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); | |
5956618c JG |
564 | if (ret) { |
565 | PERROR("Failed to create \"%s\" socket", | |
566 | formated_name ?: "Unknown"); | |
567 | goto error; | |
568 | } | |
8855795d | 569 | DBG("Listening on %s socket %d", name, sock->fd); |
d3e2ba59 JD |
570 | |
571 | ret = sock->ops->bind(sock); | |
572 | if (ret < 0) { | |
2288467f | 573 | PERROR("Failed to bind lttng-live socket"); |
d3e2ba59 JD |
574 | goto error; |
575 | } | |
576 | ||
577 | ret = sock->ops->listen(sock, -1); | |
578 | if (ret < 0) { | |
579 | goto error; | |
580 | ||
581 | } | |
582 | ||
5956618c | 583 | free(formated_name); |
d3e2ba59 JD |
584 | return sock; |
585 | ||
586 | error: | |
587 | if (sock) { | |
588 | lttcomm_destroy_sock(sock); | |
589 | } | |
5956618c | 590 | free(formated_name); |
d3e2ba59 JD |
591 | return NULL; |
592 | } | |
593 | ||
594 | /* | |
595 | * This thread manages the listening for new connections on the network | |
596 | */ | |
597 | static | |
598 | void *thread_listener(void *data) | |
599 | { | |
600 | int i, ret, pollfd, err = -1; | |
d3e2ba59 JD |
601 | uint32_t revents, nb_fd; |
602 | struct lttng_poll_event events; | |
603 | struct lttcomm_sock *live_control_sock; | |
604 | ||
605 | DBG("[thread] Relay live listener started"); | |
606 | ||
8fba2b8d | 607 | rcu_register_thread(); |
eea7556c MD |
608 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_LISTENER); |
609 | ||
610 | health_code_update(); | |
611 | ||
8855795d | 612 | live_control_sock = init_socket(live_uri, "Live listener"); |
d3e2ba59 JD |
613 | if (!live_control_sock) { |
614 | goto error_sock_control; | |
615 | } | |
616 | ||
fb4d42ab | 617 | /* Pass 2 as size here for the thread quit pipe and control sockets. */ |
23f940ff JG |
618 | ret = create_named_thread_poll_set(&events, 2, |
619 | "Live listener thread epoll"); | |
d3e2ba59 JD |
620 | if (ret < 0) { |
621 | goto error_create_poll; | |
622 | } | |
623 | ||
624 | /* Add the control socket */ | |
625 | ret = lttng_poll_add(&events, live_control_sock->fd, LPOLLIN | LPOLLRDHUP); | |
626 | if (ret < 0) { | |
627 | goto error_poll_add; | |
628 | } | |
629 | ||
3fd27398 MD |
630 | lttng_relay_notify_ready(); |
631 | ||
9b5e0863 MD |
632 | if (testpoint(relayd_thread_live_listener)) { |
633 | goto error_testpoint; | |
634 | } | |
635 | ||
d3e2ba59 | 636 | while (1) { |
eea7556c MD |
637 | health_code_update(); |
638 | ||
d3e2ba59 JD |
639 | DBG("Listener accepting live viewers connections"); |
640 | ||
641 | restart: | |
eea7556c | 642 | health_poll_entry(); |
d3e2ba59 | 643 | ret = lttng_poll_wait(&events, -1); |
eea7556c | 644 | health_poll_exit(); |
d3e2ba59 JD |
645 | if (ret < 0) { |
646 | /* | |
647 | * Restart interrupted system call. | |
648 | */ | |
649 | if (errno == EINTR) { | |
650 | goto restart; | |
651 | } | |
652 | goto error; | |
653 | } | |
654 | nb_fd = ret; | |
655 | ||
656 | DBG("Relay new viewer connection received"); | |
657 | for (i = 0; i < nb_fd; i++) { | |
eea7556c MD |
658 | health_code_update(); |
659 | ||
d3e2ba59 JD |
660 | /* Fetch once the poll data */ |
661 | revents = LTTNG_POLL_GETEV(&events, i); | |
662 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
663 | ||
664 | /* Thread quit pipe has been closed. Killing thread. */ | |
bcf4a440 | 665 | ret = check_thread_quit_pipe(pollfd, revents); |
d3e2ba59 JD |
666 | if (ret) { |
667 | err = 0; | |
668 | goto exit; | |
669 | } | |
670 | ||
03e43155 | 671 | if (revents & LPOLLIN) { |
d3e2ba59 | 672 | /* |
7591bab1 MD |
673 | * A new connection is requested, therefore a |
674 | * viewer connection is allocated in this | |
675 | * thread, enqueued to a global queue and | |
676 | * dequeued (and freed) in the worker thread. | |
d3e2ba59 | 677 | */ |
58eb9381 DG |
678 | int val = 1; |
679 | struct relay_connection *new_conn; | |
d3e2ba59 JD |
680 | struct lttcomm_sock *newsock; |
681 | ||
29555a78 JG |
682 | newsock = accept_live_sock(live_control_sock, |
683 | "Live socket to client"); | |
d3e2ba59 JD |
684 | if (!newsock) { |
685 | PERROR("accepting control sock"); | |
d3e2ba59 JD |
686 | goto error; |
687 | } | |
688 | DBG("Relay viewer connection accepted socket %d", newsock->fd); | |
58eb9381 | 689 | |
d3e2ba59 | 690 | ret = setsockopt(newsock->fd, SOL_SOCKET, SO_REUSEADDR, &val, |
58eb9381 | 691 | sizeof(val)); |
d3e2ba59 JD |
692 | if (ret < 0) { |
693 | PERROR("setsockopt inet"); | |
694 | lttcomm_destroy_sock(newsock); | |
d3e2ba59 JD |
695 | goto error; |
696 | } | |
7591bab1 MD |
697 | new_conn = connection_create(newsock, RELAY_CONNECTION_UNKNOWN); |
698 | if (!new_conn) { | |
699 | lttcomm_destroy_sock(newsock); | |
700 | goto error; | |
701 | } | |
702 | /* Ownership assumed by the connection. */ | |
703 | newsock = NULL; | |
d3e2ba59 | 704 | |
58eb9381 | 705 | /* Enqueue request for the dispatcher thread. */ |
8bdee6e2 SM |
706 | cds_wfcq_enqueue(&viewer_conn_queue.head, &viewer_conn_queue.tail, |
707 | &new_conn->qnode); | |
d3e2ba59 JD |
708 | |
709 | /* | |
7591bab1 MD |
710 | * Wake the dispatch queue futex. |
711 | * Implicit memory barrier with the | |
712 | * exchange in cds_wfcq_enqueue. | |
d3e2ba59 | 713 | */ |
58eb9381 | 714 | futex_nto1_wake(&viewer_conn_queue.futex); |
03e43155 MD |
715 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
716 | ERR("socket poll error"); | |
717 | goto error; | |
718 | } else { | |
719 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
720 | goto error; | |
d3e2ba59 JD |
721 | } |
722 | } | |
723 | } | |
724 | ||
725 | exit: | |
726 | error: | |
727 | error_poll_add: | |
9b5e0863 | 728 | error_testpoint: |
23f940ff | 729 | (void) fd_tracker_util_poll_clean(the_fd_tracker, &events); |
d3e2ba59 JD |
730 | error_create_poll: |
731 | if (live_control_sock->fd >= 0) { | |
8855795d JG |
732 | int sock_fd = live_control_sock->fd; |
733 | ||
734 | ret = fd_tracker_close_unsuspendable_fd(the_fd_tracker, | |
735 | &sock_fd, 1, close_sock, | |
736 | live_control_sock); | |
d3e2ba59 JD |
737 | if (ret) { |
738 | PERROR("close"); | |
739 | } | |
8855795d | 740 | live_control_sock->fd = -1; |
d3e2ba59 JD |
741 | } |
742 | lttcomm_destroy_sock(live_control_sock); | |
743 | error_sock_control: | |
744 | if (err) { | |
eea7556c | 745 | health_error(); |
d3e2ba59 JD |
746 | DBG("Live viewer listener thread exited with error"); |
747 | } | |
eea7556c | 748 | health_unregister(health_relayd); |
8fba2b8d | 749 | rcu_unregister_thread(); |
d3e2ba59 | 750 | DBG("Live viewer listener thread cleanup complete"); |
b4aacfdc MD |
751 | if (lttng_relay_stop_threads()) { |
752 | ERR("Error stopping threads"); | |
178a0557 | 753 | } |
d3e2ba59 JD |
754 | return NULL; |
755 | } | |
756 | ||
757 | /* | |
758 | * This thread manages the dispatching of the requests to worker threads | |
759 | */ | |
760 | static | |
761 | void *thread_dispatcher(void *data) | |
762 | { | |
6cd525e8 MD |
763 | int err = -1; |
764 | ssize_t ret; | |
8bdee6e2 | 765 | struct cds_wfcq_node *node; |
58eb9381 | 766 | struct relay_connection *conn = NULL; |
d3e2ba59 JD |
767 | |
768 | DBG("[thread] Live viewer relay dispatcher started"); | |
769 | ||
eea7556c MD |
770 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_DISPATCHER); |
771 | ||
9b5e0863 MD |
772 | if (testpoint(relayd_thread_live_dispatcher)) { |
773 | goto error_testpoint; | |
774 | } | |
775 | ||
eea7556c MD |
776 | health_code_update(); |
777 | ||
0ed3b1a8 | 778 | for (;;) { |
eea7556c MD |
779 | health_code_update(); |
780 | ||
d3e2ba59 | 781 | /* Atomically prepare the queue futex */ |
58eb9381 | 782 | futex_nto1_prepare(&viewer_conn_queue.futex); |
d3e2ba59 | 783 | |
0ed3b1a8 MD |
784 | if (CMM_LOAD_SHARED(live_dispatch_thread_exit)) { |
785 | break; | |
786 | } | |
787 | ||
d3e2ba59 | 788 | do { |
eea7556c MD |
789 | health_code_update(); |
790 | ||
d3e2ba59 | 791 | /* Dequeue commands */ |
8bdee6e2 SM |
792 | node = cds_wfcq_dequeue_blocking(&viewer_conn_queue.head, |
793 | &viewer_conn_queue.tail); | |
d3e2ba59 JD |
794 | if (node == NULL) { |
795 | DBG("Woken up but nothing in the live-viewer " | |
796 | "relay command queue"); | |
797 | /* Continue thread execution */ | |
798 | break; | |
799 | } | |
58eb9381 | 800 | conn = caa_container_of(node, struct relay_connection, qnode); |
d3e2ba59 | 801 | DBG("Dispatching viewer request waiting on sock %d", |
58eb9381 | 802 | conn->sock->fd); |
d3e2ba59 JD |
803 | |
804 | /* | |
7591bab1 MD |
805 | * Inform worker thread of the new request. This |
806 | * call is blocking so we can be assured that | |
807 | * the data will be read at some point in time | |
808 | * or wait to the end of the world :) | |
d3e2ba59 | 809 | */ |
58eb9381 DG |
810 | ret = lttng_write(live_conn_pipe[1], &conn, sizeof(conn)); |
811 | if (ret < 0) { | |
812 | PERROR("write conn pipe"); | |
7591bab1 | 813 | connection_put(conn); |
d3e2ba59 JD |
814 | goto error; |
815 | } | |
816 | } while (node != NULL); | |
817 | ||
818 | /* Futex wait on queue. Blocking call on futex() */ | |
eea7556c | 819 | health_poll_entry(); |
58eb9381 | 820 | futex_nto1_wait(&viewer_conn_queue.futex); |
eea7556c | 821 | health_poll_exit(); |
d3e2ba59 JD |
822 | } |
823 | ||
eea7556c MD |
824 | /* Normal exit, no error */ |
825 | err = 0; | |
826 | ||
d3e2ba59 | 827 | error: |
9b5e0863 | 828 | error_testpoint: |
eea7556c MD |
829 | if (err) { |
830 | health_error(); | |
831 | ERR("Health error occurred in %s", __func__); | |
832 | } | |
833 | health_unregister(health_relayd); | |
d3e2ba59 | 834 | DBG("Live viewer dispatch thread dying"); |
b4aacfdc MD |
835 | if (lttng_relay_stop_threads()) { |
836 | ERR("Error stopping threads"); | |
178a0557 | 837 | } |
d3e2ba59 JD |
838 | return NULL; |
839 | } | |
840 | ||
841 | /* | |
842 | * Establish connection with the viewer and check the versions. | |
843 | * | |
844 | * Return 0 on success or else negative value. | |
845 | */ | |
846 | static | |
58eb9381 | 847 | int viewer_connect(struct relay_connection *conn) |
d3e2ba59 JD |
848 | { |
849 | int ret; | |
850 | struct lttng_viewer_connect reply, msg; | |
851 | ||
58eb9381 | 852 | conn->version_check_done = 1; |
d3e2ba59 | 853 | |
eea7556c MD |
854 | health_code_update(); |
855 | ||
2f8f53af DG |
856 | DBG("Viewer is establishing a connection to the relayd."); |
857 | ||
58eb9381 | 858 | ret = recv_request(conn->sock, &msg, sizeof(msg)); |
2f8f53af | 859 | if (ret < 0) { |
d3e2ba59 JD |
860 | goto end; |
861 | } | |
862 | ||
eea7556c MD |
863 | health_code_update(); |
864 | ||
f46b2ce6 | 865 | memset(&reply, 0, sizeof(reply)); |
d3e2ba59 JD |
866 | reply.major = RELAYD_VERSION_COMM_MAJOR; |
867 | reply.minor = RELAYD_VERSION_COMM_MINOR; | |
868 | ||
869 | /* Major versions must be the same */ | |
870 | if (reply.major != be32toh(msg.major)) { | |
2f8f53af DG |
871 | DBG("Incompatible major versions ([relayd] %u vs [client] %u)", |
872 | reply.major, be32toh(msg.major)); | |
72180669 | 873 | ret = -1; |
d3e2ba59 JD |
874 | goto end; |
875 | } | |
876 | ||
58eb9381 | 877 | conn->major = reply.major; |
d3e2ba59 JD |
878 | /* We adapt to the lowest compatible version */ |
879 | if (reply.minor <= be32toh(msg.minor)) { | |
58eb9381 | 880 | conn->minor = reply.minor; |
d3e2ba59 | 881 | } else { |
58eb9381 | 882 | conn->minor = be32toh(msg.minor); |
d3e2ba59 JD |
883 | } |
884 | ||
c4e361a4 | 885 | if (be32toh(msg.type) == LTTNG_VIEWER_CLIENT_COMMAND) { |
58eb9381 | 886 | conn->type = RELAY_VIEWER_COMMAND; |
c4e361a4 | 887 | } else if (be32toh(msg.type) == LTTNG_VIEWER_CLIENT_NOTIFICATION) { |
58eb9381 | 888 | conn->type = RELAY_VIEWER_NOTIFICATION; |
d3e2ba59 JD |
889 | } else { |
890 | ERR("Unknown connection type : %u", be32toh(msg.type)); | |
891 | ret = -1; | |
892 | goto end; | |
893 | } | |
894 | ||
895 | reply.major = htobe32(reply.major); | |
896 | reply.minor = htobe32(reply.minor); | |
58eb9381 | 897 | if (conn->type == RELAY_VIEWER_COMMAND) { |
93b4787b | 898 | /* |
7591bab1 MD |
899 | * Increment outside of htobe64 macro, because the argument can |
900 | * be used more than once within the macro, and thus the | |
901 | * operation may be undefined. | |
93b4787b | 902 | */ |
7591bab1 | 903 | pthread_mutex_lock(&last_relay_viewer_session_id_lock); |
93b4787b | 904 | last_relay_viewer_session_id++; |
7591bab1 | 905 | pthread_mutex_unlock(&last_relay_viewer_session_id_lock); |
93b4787b | 906 | reply.viewer_session_id = htobe64(last_relay_viewer_session_id); |
d3e2ba59 | 907 | } |
eea7556c MD |
908 | |
909 | health_code_update(); | |
910 | ||
58eb9381 | 911 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 912 | if (ret < 0) { |
2f8f53af | 913 | goto end; |
d3e2ba59 JD |
914 | } |
915 | ||
eea7556c MD |
916 | health_code_update(); |
917 | ||
58eb9381 | 918 | DBG("Version check done using protocol %u.%u", conn->major, conn->minor); |
d3e2ba59 JD |
919 | ret = 0; |
920 | ||
921 | end: | |
922 | return ret; | |
923 | } | |
924 | ||
925 | /* | |
926 | * Send the viewer the list of current sessions. | |
7591bab1 MD |
927 | * We need to create a copy of the hash table content because otherwise |
928 | * we cannot assume the number of entries stays the same between getting | |
929 | * the number of HT elements and iteration over the HT. | |
d3e2ba59 JD |
930 | * |
931 | * Return 0 on success or else a negative value. | |
932 | */ | |
933 | static | |
58eb9381 | 934 | int viewer_list_sessions(struct relay_connection *conn) |
d3e2ba59 | 935 | { |
5f10c6b1 | 936 | int ret = 0; |
d3e2ba59 | 937 | struct lttng_viewer_list_sessions session_list; |
d3e2ba59 | 938 | struct lttng_ht_iter iter; |
d3e2ba59 | 939 | struct relay_session *session; |
7591bab1 MD |
940 | struct lttng_viewer_session *send_session_buf = NULL; |
941 | uint32_t buf_count = SESSION_BUF_DEFAULT_COUNT; | |
942 | uint32_t count = 0; | |
d3e2ba59 JD |
943 | |
944 | DBG("List sessions received"); | |
945 | ||
7591bab1 MD |
946 | send_session_buf = zmalloc(SESSION_BUF_DEFAULT_COUNT * sizeof(*send_session_buf)); |
947 | if (!send_session_buf) { | |
948 | return -1; | |
d3e2ba59 JD |
949 | } |
950 | ||
7591bab1 MD |
951 | rcu_read_lock(); |
952 | cds_lfht_for_each_entry(sessions_ht->ht, &iter.iter, session, | |
2f8f53af | 953 | session_n.node) { |
7591bab1 | 954 | struct lttng_viewer_session *send_session; |
d3e2ba59 | 955 | |
eea7556c MD |
956 | health_code_update(); |
957 | ||
d995f382 | 958 | pthread_mutex_lock(&session->lock); |
7e0a4379 JR |
959 | if (session->connection_closed) { |
960 | /* Skip closed session */ | |
d995f382 JG |
961 | goto next_session; |
962 | } | |
963 | if (!session->current_trace_chunk) { | |
964 | /* | |
965 | * Skip un-attachable session. It is either | |
966 | * being destroyed or has not had a trace | |
967 | * chunk created against it yet. | |
968 | */ | |
969 | goto next_session; | |
7e0a4379 JR |
970 | } |
971 | ||
7591bab1 MD |
972 | if (count >= buf_count) { |
973 | struct lttng_viewer_session *newbuf; | |
974 | uint32_t new_buf_count = buf_count << 1; | |
eea7556c | 975 | |
7591bab1 MD |
976 | newbuf = realloc(send_session_buf, |
977 | new_buf_count * sizeof(*send_session_buf)); | |
978 | if (!newbuf) { | |
979 | ret = -1; | |
d995f382 | 980 | goto break_loop; |
7591bab1 MD |
981 | } |
982 | send_session_buf = newbuf; | |
983 | buf_count = new_buf_count; | |
6763619c | 984 | } |
7591bab1 | 985 | send_session = &send_session_buf[count]; |
bfc3fb17 MD |
986 | if (lttng_strncpy(send_session->session_name, |
987 | session->session_name, | |
988 | sizeof(send_session->session_name))) { | |
989 | ret = -1; | |
d995f382 | 990 | goto break_loop; |
bfc3fb17 MD |
991 | } |
992 | if (lttng_strncpy(send_session->hostname, session->hostname, | |
993 | sizeof(send_session->hostname))) { | |
994 | ret = -1; | |
d995f382 | 995 | goto break_loop; |
bfc3fb17 | 996 | } |
7591bab1 MD |
997 | send_session->id = htobe64(session->id); |
998 | send_session->live_timer = htobe32(session->live_timer); | |
999 | if (session->viewer_attached) { | |
1000 | send_session->clients = htobe32(1); | |
1001 | } else { | |
1002 | send_session->clients = htobe32(0); | |
d227d5bd | 1003 | } |
7591bab1 MD |
1004 | send_session->streams = htobe32(session->stream_count); |
1005 | count++; | |
d995f382 JG |
1006 | next_session: |
1007 | pthread_mutex_unlock(&session->lock); | |
1008 | continue; | |
1009 | break_loop: | |
1010 | pthread_mutex_unlock(&session->lock); | |
1011 | break; | |
7591bab1 MD |
1012 | } |
1013 | rcu_read_unlock(); | |
5f10c6b1 JG |
1014 | if (ret < 0) { |
1015 | goto end_free; | |
1016 | } | |
d227d5bd | 1017 | |
7591bab1 | 1018 | session_list.sessions_count = htobe32(count); |
d227d5bd | 1019 | |
7591bab1 | 1020 | health_code_update(); |
d227d5bd | 1021 | |
7591bab1 MD |
1022 | ret = send_response(conn->sock, &session_list, sizeof(session_list)); |
1023 | if (ret < 0) { | |
1024 | goto end_free; | |
d227d5bd | 1025 | } |
d227d5bd | 1026 | |
7591bab1 | 1027 | health_code_update(); |
d227d5bd | 1028 | |
7591bab1 MD |
1029 | ret = send_response(conn->sock, send_session_buf, |
1030 | count * sizeof(*send_session_buf)); | |
1031 | if (ret < 0) { | |
1032 | goto end_free; | |
d227d5bd | 1033 | } |
7591bab1 | 1034 | health_code_update(); |
d227d5bd | 1035 | |
7591bab1 MD |
1036 | ret = 0; |
1037 | end_free: | |
1038 | free(send_session_buf); | |
1039 | return ret; | |
d227d5bd JD |
1040 | } |
1041 | ||
80e8027a | 1042 | /* |
7591bab1 | 1043 | * Send the viewer the list of current streams. |
80e8027a JD |
1044 | */ |
1045 | static | |
58eb9381 | 1046 | int viewer_get_new_streams(struct relay_connection *conn) |
80e8027a JD |
1047 | { |
1048 | int ret, send_streams = 0; | |
7591bab1 | 1049 | uint32_t nb_created = 0, nb_unsent = 0, nb_streams = 0, nb_total = 0; |
80e8027a JD |
1050 | struct lttng_viewer_new_streams_request request; |
1051 | struct lttng_viewer_new_streams_response response; | |
b66a15d1 | 1052 | struct relay_session *session = NULL; |
6763619c | 1053 | uint64_t session_id; |
bddf80e4 | 1054 | bool closed = false; |
80e8027a | 1055 | |
58eb9381 | 1056 | assert(conn); |
80e8027a JD |
1057 | |
1058 | DBG("Get new streams received"); | |
1059 | ||
80e8027a JD |
1060 | health_code_update(); |
1061 | ||
2f8f53af | 1062 | /* Receive the request from the connected client. */ |
58eb9381 | 1063 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 1064 | if (ret < 0) { |
80e8027a JD |
1065 | goto error; |
1066 | } | |
6763619c | 1067 | session_id = be64toh(request.session_id); |
80e8027a JD |
1068 | |
1069 | health_code_update(); | |
1070 | ||
53efb85a MD |
1071 | memset(&response, 0, sizeof(response)); |
1072 | ||
7591bab1 | 1073 | session = session_get_by_id(session_id); |
2f8f53af | 1074 | if (!session) { |
6763619c | 1075 | DBG("Relay session %" PRIu64 " not found", session_id); |
c4e361a4 | 1076 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_ERR); |
80e8027a JD |
1077 | goto send_reply; |
1078 | } | |
1079 | ||
7591bab1 | 1080 | if (!viewer_session_is_attached(conn->viewer_session, session)) { |
c4e361a4 | 1081 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_ERR); |
80e8027a JD |
1082 | goto send_reply; |
1083 | } | |
1084 | ||
c06fdd95 | 1085 | pthread_mutex_lock(&session->lock); |
b66a15d1 JG |
1086 | ret = make_viewer_streams(session, |
1087 | conn->viewer_session->current_trace_chunk, | |
1088 | LTTNG_VIEWER_SEEK_LAST, &nb_total, &nb_unsent, | |
bddf80e4 | 1089 | &nb_created, &closed); |
2f8f53af | 1090 | if (ret < 0) { |
b66a15d1 | 1091 | goto error_unlock_session; |
2f8f53af | 1092 | } |
3d0bbd40 JG |
1093 | send_streams = 1; |
1094 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_OK); | |
b66a15d1 | 1095 | |
2f8f53af DG |
1096 | /* Only send back the newly created streams with the unsent ones. */ |
1097 | nb_streams = nb_created + nb_unsent; | |
80e8027a JD |
1098 | response.streams_count = htobe32(nb_streams); |
1099 | ||
4479f682 | 1100 | /* |
2229a09c MD |
1101 | * If the session is closed, HUP when there are no more streams |
1102 | * with data. | |
4479f682 | 1103 | */ |
bddf80e4 | 1104 | if (closed && nb_total == 0) { |
4479f682 | 1105 | send_streams = 0; |
bddf80e4 | 1106 | response.streams_count = 0; |
4479f682 | 1107 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_HUP); |
3d0bbd40 | 1108 | goto send_reply_unlock; |
4479f682 | 1109 | } |
3d0bbd40 JG |
1110 | send_reply_unlock: |
1111 | pthread_mutex_unlock(&session->lock); | |
4479f682 | 1112 | |
80e8027a JD |
1113 | send_reply: |
1114 | health_code_update(); | |
58eb9381 | 1115 | ret = send_response(conn->sock, &response, sizeof(response)); |
80e8027a | 1116 | if (ret < 0) { |
7591bab1 | 1117 | goto end_put_session; |
80e8027a JD |
1118 | } |
1119 | health_code_update(); | |
1120 | ||
1121 | /* | |
7591bab1 MD |
1122 | * Unknown or empty session, just return gracefully, the viewer |
1123 | * knows what is happening. | |
80e8027a JD |
1124 | */ |
1125 | if (!send_streams || !nb_streams) { | |
1126 | ret = 0; | |
7591bab1 | 1127 | goto end_put_session; |
80e8027a JD |
1128 | } |
1129 | ||
2f8f53af | 1130 | /* |
7591bab1 MD |
1131 | * Send stream and *DON'T* ignore the sent flag so every viewer |
1132 | * streams that were not sent from that point will be sent to | |
1133 | * the viewer. | |
2f8f53af | 1134 | */ |
c06fdd95 | 1135 | ret = send_viewer_streams(conn->sock, session_id, 0); |
2f8f53af | 1136 | if (ret < 0) { |
7591bab1 | 1137 | goto end_put_session; |
80e8027a JD |
1138 | } |
1139 | ||
7591bab1 MD |
1140 | end_put_session: |
1141 | if (session) { | |
1142 | session_put(session); | |
1143 | } | |
80e8027a JD |
1144 | error: |
1145 | return ret; | |
b66a15d1 JG |
1146 | error_unlock_session: |
1147 | pthread_mutex_unlock(&session->lock); | |
1148 | session_put(session); | |
1149 | return ret; | |
80e8027a JD |
1150 | } |
1151 | ||
d3e2ba59 JD |
1152 | /* |
1153 | * Send the viewer the list of current sessions. | |
1154 | */ | |
1155 | static | |
58eb9381 | 1156 | int viewer_attach_session(struct relay_connection *conn) |
d3e2ba59 | 1157 | { |
2f8f53af DG |
1158 | int send_streams = 0; |
1159 | ssize_t ret; | |
80e8027a | 1160 | uint32_t nb_streams = 0; |
2f8f53af | 1161 | enum lttng_viewer_seek seek_type; |
d3e2ba59 JD |
1162 | struct lttng_viewer_attach_session_request request; |
1163 | struct lttng_viewer_attach_session_response response; | |
7591bab1 | 1164 | struct relay_session *session = NULL; |
dbd6665b | 1165 | enum lttng_viewer_attach_return_code viewer_attach_status; |
bddf80e4 | 1166 | bool closed = false; |
c06fdd95 | 1167 | uint64_t session_id; |
d3e2ba59 | 1168 | |
58eb9381 | 1169 | assert(conn); |
d3e2ba59 | 1170 | |
eea7556c MD |
1171 | health_code_update(); |
1172 | ||
2f8f53af | 1173 | /* Receive the request from the connected client. */ |
58eb9381 | 1174 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 1175 | if (ret < 0) { |
d3e2ba59 JD |
1176 | goto error; |
1177 | } | |
1178 | ||
c06fdd95 | 1179 | session_id = be64toh(request.session_id); |
eea7556c MD |
1180 | health_code_update(); |
1181 | ||
53efb85a MD |
1182 | memset(&response, 0, sizeof(response)); |
1183 | ||
c3b7390b JD |
1184 | if (!conn->viewer_session) { |
1185 | DBG("Client trying to attach before creating a live viewer session"); | |
1186 | response.status = htobe32(LTTNG_VIEWER_ATTACH_NO_SESSION); | |
1187 | goto send_reply; | |
1188 | } | |
1189 | ||
c06fdd95 | 1190 | session = session_get_by_id(session_id); |
2f8f53af | 1191 | if (!session) { |
c06fdd95 | 1192 | DBG("Relay session %" PRIu64 " not found", session_id); |
c4e361a4 | 1193 | response.status = htobe32(LTTNG_VIEWER_ATTACH_UNK); |
d3e2ba59 JD |
1194 | goto send_reply; |
1195 | } | |
c06fdd95 | 1196 | DBG("Attach session ID %" PRIu64 " received", session_id); |
d3e2ba59 | 1197 | |
c06fdd95 | 1198 | pthread_mutex_lock(&session->lock); |
79a42980 JG |
1199 | if (!session->current_trace_chunk) { |
1200 | /* | |
1201 | * Session is either being destroyed or it never had a trace | |
1202 | * chunk created against it. | |
1203 | */ | |
1204 | DBG("Session requested by live client has no current trace chunk, returning unknown session"); | |
1205 | response.status = htobe32(LTTNG_VIEWER_ATTACH_UNK); | |
1206 | goto send_reply; | |
1207 | } | |
7591bab1 | 1208 | if (session->live_timer == 0) { |
d3e2ba59 | 1209 | DBG("Not live session"); |
c4e361a4 | 1210 | response.status = htobe32(LTTNG_VIEWER_ATTACH_NOT_LIVE); |
d3e2ba59 | 1211 | goto send_reply; |
7591bab1 MD |
1212 | } |
1213 | ||
1214 | send_streams = 1; | |
dbd6665b JG |
1215 | viewer_attach_status = viewer_session_attach(conn->viewer_session, |
1216 | session); | |
1217 | if (viewer_attach_status != LTTNG_VIEWER_ATTACH_OK) { | |
1218 | response.status = htobe32(viewer_attach_status); | |
7591bab1 | 1219 | goto send_reply; |
d3e2ba59 JD |
1220 | } |
1221 | ||
1222 | switch (be32toh(request.seek)) { | |
c4e361a4 JD |
1223 | case LTTNG_VIEWER_SEEK_BEGINNING: |
1224 | case LTTNG_VIEWER_SEEK_LAST: | |
7591bab1 | 1225 | response.status = htobe32(LTTNG_VIEWER_ATTACH_OK); |
2f8f53af | 1226 | seek_type = be32toh(request.seek); |
d3e2ba59 JD |
1227 | break; |
1228 | default: | |
1229 | ERR("Wrong seek parameter"); | |
c4e361a4 | 1230 | response.status = htobe32(LTTNG_VIEWER_ATTACH_SEEK_ERR); |
d3e2ba59 JD |
1231 | send_streams = 0; |
1232 | goto send_reply; | |
1233 | } | |
1234 | ||
b66a15d1 JG |
1235 | ret = make_viewer_streams(session, |
1236 | conn->viewer_session->current_trace_chunk, seek_type, | |
1237 | &nb_streams, NULL, NULL, &closed); | |
2f8f53af | 1238 | if (ret < 0) { |
7591bab1 | 1239 | goto end_put_session; |
d3e2ba59 | 1240 | } |
c06fdd95 JG |
1241 | pthread_mutex_unlock(&session->lock); |
1242 | session_put(session); | |
1243 | session = NULL; | |
1244 | ||
1245 | response.streams_count = htobe32(nb_streams); | |
bddf80e4 MD |
1246 | /* |
1247 | * If the session is closed when the viewer is attaching, it | |
1248 | * means some of the streams may have been concurrently removed, | |
1249 | * so we don't allow the viewer to attach, even if there are | |
1250 | * streams available. | |
1251 | */ | |
1252 | if (closed) { | |
1253 | send_streams = 0; | |
1254 | response.streams_count = 0; | |
06079f15 | 1255 | response.status = htobe32(LTTNG_VIEWER_ATTACH_UNK); |
bddf80e4 MD |
1256 | goto send_reply; |
1257 | } | |
1258 | ||
d3e2ba59 | 1259 | send_reply: |
eea7556c | 1260 | health_code_update(); |
58eb9381 | 1261 | ret = send_response(conn->sock, &response, sizeof(response)); |
d3e2ba59 | 1262 | if (ret < 0) { |
7591bab1 | 1263 | goto end_put_session; |
d3e2ba59 | 1264 | } |
eea7556c | 1265 | health_code_update(); |
d3e2ba59 JD |
1266 | |
1267 | /* | |
7591bab1 MD |
1268 | * Unknown or empty session, just return gracefully, the viewer |
1269 | * knows what is happening. | |
d3e2ba59 | 1270 | */ |
157df586 | 1271 | if (!send_streams || !nb_streams) { |
d3e2ba59 | 1272 | ret = 0; |
7591bab1 | 1273 | goto end_put_session; |
d3e2ba59 JD |
1274 | } |
1275 | ||
2f8f53af | 1276 | /* Send stream and ignore the sent flag. */ |
c06fdd95 | 1277 | ret = send_viewer_streams(conn->sock, session_id, 1); |
2f8f53af | 1278 | if (ret < 0) { |
7591bab1 | 1279 | goto end_put_session; |
d3e2ba59 | 1280 | } |
d3e2ba59 | 1281 | |
7591bab1 MD |
1282 | end_put_session: |
1283 | if (session) { | |
c06fdd95 | 1284 | pthread_mutex_unlock(&session->lock); |
7591bab1 MD |
1285 | session_put(session); |
1286 | } | |
4a9daf17 JD |
1287 | error: |
1288 | return ret; | |
1289 | } | |
1290 | ||
878c34cf DG |
1291 | /* |
1292 | * Open the index file if needed for the given vstream. | |
1293 | * | |
f8f3885c MD |
1294 | * If an index file is successfully opened, the vstream will set it as its |
1295 | * current index file. | |
878c34cf DG |
1296 | * |
1297 | * Return 0 on success, a negative value on error (-ENOENT if not ready yet). | |
7591bab1 MD |
1298 | * |
1299 | * Called with rstream lock held. | |
878c34cf DG |
1300 | */ |
1301 | static int try_open_index(struct relay_viewer_stream *vstream, | |
1302 | struct relay_stream *rstream) | |
1303 | { | |
1304 | int ret = 0; | |
ebb29c10 JG |
1305 | const uint32_t connection_major = rstream->trace->session->major; |
1306 | const uint32_t connection_minor = rstream->trace->session->minor; | |
3ff5c5db | 1307 | enum lttng_trace_chunk_status chunk_status; |
878c34cf | 1308 | |
f8f3885c | 1309 | if (vstream->index_file) { |
878c34cf DG |
1310 | goto end; |
1311 | } | |
1312 | ||
1313 | /* | |
7591bab1 | 1314 | * First time, we open the index file and at least one index is ready. |
878c34cf | 1315 | */ |
a44ca2ca | 1316 | if (rstream->index_received_seqcount == 0) { |
878c34cf DG |
1317 | ret = -ENOENT; |
1318 | goto end; | |
1319 | } | |
3ff5c5db | 1320 | chunk_status = lttng_index_file_create_from_trace_chunk_read_only( |
b66a15d1 | 1321 | vstream->stream_file.trace_chunk, rstream->path_name, |
ebb29c10 JG |
1322 | rstream->channel_name, rstream->tracefile_size, |
1323 | vstream->current_tracefile_id, | |
1324 | lttng_to_index_major(connection_major, connection_minor), | |
3ff5c5db MD |
1325 | lttng_to_index_minor(connection_major, connection_minor), |
1326 | true, &vstream->index_file); | |
1327 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
1328 | if (chunk_status == LTTNG_TRACE_CHUNK_STATUS_NO_FILE) { | |
1329 | ret = -ENOENT; | |
1330 | } else { | |
1331 | ret = -1; | |
1332 | } | |
878c34cf DG |
1333 | } |
1334 | ||
1335 | end: | |
1336 | return ret; | |
1337 | } | |
1338 | ||
1339 | /* | |
7591bab1 MD |
1340 | * Check the status of the index for the given stream. This function |
1341 | * updates the index structure if needed and can put (close) the vstream | |
1342 | * in the HUP situation. | |
1343 | * | |
1344 | * Return 0 means that we can proceed with the index. A value of 1 means | |
1345 | * that the index has been updated and is ready to be sent to the | |
1346 | * client. A negative value indicates an error that can't be handled. | |
878c34cf | 1347 | * |
7591bab1 | 1348 | * Called with rstream lock held. |
878c34cf DG |
1349 | */ |
1350 | static int check_index_status(struct relay_viewer_stream *vstream, | |
1351 | struct relay_stream *rstream, struct ctf_trace *trace, | |
1352 | struct lttng_viewer_index *index) | |
1353 | { | |
1354 | int ret; | |
1355 | ||
68c40154 MD |
1356 | DBG("Check index status: index_received_seqcount %" PRIu64 " " |
1357 | "index_sent_seqcount %" PRIu64 " " | |
1358 | "for stream %" PRIu64, | |
1359 | rstream->index_received_seqcount, | |
1360 | vstream->index_sent_seqcount, | |
1361 | vstream->stream->stream_handle); | |
797bc362 | 1362 | if ((trace->session->connection_closed || rstream->closed) |
a44ca2ca MD |
1363 | && rstream->index_received_seqcount |
1364 | == vstream->index_sent_seqcount) { | |
797bc362 MD |
1365 | /* |
1366 | * Last index sent and session connection or relay | |
1367 | * stream are closed. | |
1368 | */ | |
7591bab1 MD |
1369 | index->status = htobe32(LTTNG_VIEWER_INDEX_HUP); |
1370 | goto hup; | |
1371 | } else if (rstream->beacon_ts_end != -1ULL && | |
b0d240a2 MD |
1372 | (rstream->index_received_seqcount == 0 || |
1373 | (vstream->index_sent_seqcount != 0 && | |
a44ca2ca | 1374 | rstream->index_received_seqcount |
b0d240a2 | 1375 | <= vstream->index_sent_seqcount))) { |
7591bab1 MD |
1376 | /* |
1377 | * We've received a synchronization beacon and the last index | |
1378 | * available has been sent, the index for now is inactive. | |
1379 | * | |
1380 | * In this case, we have received a beacon which allows us to | |
1381 | * inform the client of a time interval during which we can | |
1382 | * guarantee that there are no events to read (and never will | |
1383 | * be). | |
b0d240a2 MD |
1384 | * |
1385 | * The sent seqcount can grow higher than receive seqcount on | |
1386 | * clear because the rotation performed by clear will push | |
1387 | * the index_sent_seqcount ahead (see | |
1388 | * viewer_stream_sync_tracefile_array_tail) and skip over | |
1389 | * packet sequence numbers. | |
7591bab1 MD |
1390 | */ |
1391 | index->status = htobe32(LTTNG_VIEWER_INDEX_INACTIVE); | |
1392 | index->timestamp_end = htobe64(rstream->beacon_ts_end); | |
1393 | index->stream_id = htobe64(rstream->ctf_stream_id); | |
68c40154 MD |
1394 | DBG("Check index status: inactive with beacon, for stream %" PRIu64, |
1395 | vstream->stream->stream_handle); | |
7591bab1 | 1396 | goto index_ready; |
b0d240a2 MD |
1397 | } else if (rstream->index_received_seqcount == 0 || |
1398 | (vstream->index_sent_seqcount != 0 && | |
1399 | rstream->index_received_seqcount | |
1400 | <= vstream->index_sent_seqcount)) { | |
7591bab1 | 1401 | /* |
b0d240a2 | 1402 | * This checks whether received <= sent seqcount. In |
a44ca2ca MD |
1403 | * this case, we have not received a beacon. Therefore, |
1404 | * we can only ask the client to retry later. | |
b0d240a2 MD |
1405 | * |
1406 | * The sent seqcount can grow higher than receive seqcount on | |
1407 | * clear because the rotation performed by clear will push | |
1408 | * the index_sent_seqcount ahead (see | |
1409 | * viewer_stream_sync_tracefile_array_tail) and skip over | |
1410 | * packet sequence numbers. | |
7591bab1 MD |
1411 | */ |
1412 | index->status = htobe32(LTTNG_VIEWER_INDEX_RETRY); | |
68c40154 MD |
1413 | DBG("Check index status: retry for stream %" PRIu64, |
1414 | vstream->stream->stream_handle); | |
7591bab1 | 1415 | goto index_ready; |
a44ca2ca MD |
1416 | } else if (!tracefile_array_seq_in_file(rstream->tfa, |
1417 | vstream->current_tracefile_id, | |
1418 | vstream->index_sent_seqcount)) { | |
7591bab1 | 1419 | /* |
a44ca2ca MD |
1420 | * The next index we want to send cannot be read either |
1421 | * because we need to perform a rotation, or due to | |
1422 | * the producer having overwritten its trace file. | |
7591bab1 | 1423 | */ |
a44ca2ca | 1424 | DBG("Viewer stream %" PRIu64 " rotation", |
7591bab1 MD |
1425 | vstream->stream->stream_handle); |
1426 | ret = viewer_stream_rotate(vstream); | |
b0d240a2 | 1427 | if (ret == 1) { |
7591bab1 MD |
1428 | /* EOF across entire stream. */ |
1429 | index->status = htobe32(LTTNG_VIEWER_INDEX_HUP); | |
1430 | goto hup; | |
1431 | } | |
7591bab1 | 1432 | /* |
a44ca2ca MD |
1433 | * If we have been pushed due to overwrite, it |
1434 | * necessarily means there is data that can be read in | |
1435 | * the stream. If we rotated because we reached the end | |
1436 | * of a tracefile, it means the following tracefile | |
1437 | * needs to contain at least one index, else we would | |
1438 | * have already returned LTTNG_VIEWER_INDEX_RETRY to the | |
1439 | * viewer. The updated index_sent_seqcount needs to | |
1440 | * point to a readable index entry now. | |
1441 | * | |
1442 | * In the case where we "rotate" on a single file, we | |
1443 | * can end up in a case where the requested index is | |
1444 | * still unavailable. | |
7591bab1 | 1445 | */ |
a44ca2ca MD |
1446 | if (rstream->tracefile_count == 1 && |
1447 | !tracefile_array_seq_in_file( | |
1448 | rstream->tfa, | |
1449 | vstream->current_tracefile_id, | |
1450 | vstream->index_sent_seqcount)) { | |
1451 | index->status = htobe32(LTTNG_VIEWER_INDEX_RETRY); | |
68c40154 MD |
1452 | DBG("Check index status: retry: " |
1453 | "tracefile array sequence number %" PRIu64 | |
1454 | " not in file for stream %" PRIu64, | |
1455 | vstream->index_sent_seqcount, | |
1456 | vstream->stream->stream_handle); | |
a44ca2ca | 1457 | goto index_ready; |
878c34cf | 1458 | } |
a44ca2ca MD |
1459 | assert(tracefile_array_seq_in_file(rstream->tfa, |
1460 | vstream->current_tracefile_id, | |
1461 | vstream->index_sent_seqcount)); | |
878c34cf | 1462 | } |
a44ca2ca MD |
1463 | /* ret == 0 means successful so we continue. */ |
1464 | ret = 0; | |
878c34cf DG |
1465 | return ret; |
1466 | ||
1467 | hup: | |
7591bab1 | 1468 | viewer_stream_put(vstream); |
878c34cf DG |
1469 | index_ready: |
1470 | return 1; | |
1471 | } | |
1472 | ||
d3e2ba59 JD |
1473 | /* |
1474 | * Send the next index for a stream. | |
1475 | * | |
1476 | * Return 0 on success or else a negative value. | |
1477 | */ | |
1478 | static | |
58eb9381 | 1479 | int viewer_get_next_index(struct relay_connection *conn) |
d3e2ba59 JD |
1480 | { |
1481 | int ret; | |
1482 | struct lttng_viewer_get_next_index request_index; | |
1483 | struct lttng_viewer_index viewer_index; | |
50adc264 | 1484 | struct ctf_packet_index packet_index; |
7591bab1 MD |
1485 | struct relay_viewer_stream *vstream = NULL; |
1486 | struct relay_stream *rstream = NULL; | |
1487 | struct ctf_trace *ctf_trace = NULL; | |
1488 | struct relay_viewer_stream *metadata_viewer_stream = NULL; | |
d3e2ba59 | 1489 | |
58eb9381 | 1490 | assert(conn); |
d3e2ba59 JD |
1491 | |
1492 | DBG("Viewer get next index"); | |
1493 | ||
7591bab1 | 1494 | memset(&viewer_index, 0, sizeof(viewer_index)); |
eea7556c | 1495 | health_code_update(); |
2f8f53af | 1496 | |
58eb9381 | 1497 | ret = recv_request(conn->sock, &request_index, sizeof(request_index)); |
2f8f53af | 1498 | if (ret < 0) { |
d3e2ba59 JD |
1499 | goto end; |
1500 | } | |
eea7556c | 1501 | health_code_update(); |
d3e2ba59 | 1502 | |
7591bab1 | 1503 | vstream = viewer_stream_get_by_id(be64toh(request_index.stream_id)); |
6763619c | 1504 | if (!vstream) { |
a44ca2ca | 1505 | DBG("Client requested index of unknown stream id %" PRIu64, |
9b9f9f94 | 1506 | (uint64_t) be64toh(request_index.stream_id)); |
f1883937 MD |
1507 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
1508 | goto send_reply; | |
2a174661 DG |
1509 | } |
1510 | ||
7591bab1 MD |
1511 | /* Use back. ref. Protected by refcounts. */ |
1512 | rstream = vstream->stream; | |
1513 | ctf_trace = rstream->trace; | |
d3e2ba59 | 1514 | |
7591bab1 MD |
1515 | /* metadata_viewer_stream may be NULL. */ |
1516 | metadata_viewer_stream = | |
1517 | ctf_trace_get_viewer_metadata_stream(ctf_trace); | |
2a174661 | 1518 | |
7591bab1 | 1519 | pthread_mutex_lock(&rstream->lock); |
d3e2ba59 JD |
1520 | |
1521 | /* | |
1522 | * The viewer should not ask for index on metadata stream. | |
1523 | */ | |
7591bab1 | 1524 | if (rstream->is_metadata) { |
c4e361a4 | 1525 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_HUP); |
d3e2ba59 JD |
1526 | goto send_reply; |
1527 | } | |
1528 | ||
b0d240a2 MD |
1529 | if (rstream->ongoing_rotation.is_set) { |
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->session->ongoing_rotation) { | |
1536 | /* Rotation is ongoing, try again later. */ | |
1537 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_RETRY); | |
1538 | goto send_reply; | |
1539 | } | |
1540 | ||
1541 | if (rstream->trace_chunk) { | |
1542 | uint64_t rchunk_id, vchunk_id; | |
1543 | ||
1544 | /* | |
1545 | * If the relay stream is not yet closed, ensure the viewer | |
1546 | * chunk matches the relay chunk after clear. | |
1547 | */ | |
1548 | if (lttng_trace_chunk_get_id(rstream->trace_chunk, | |
1549 | &rchunk_id) != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
c4e361a4 | 1550 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
b0d240a2 MD |
1551 | goto send_reply; |
1552 | } | |
1553 | if (lttng_trace_chunk_get_id( | |
1554 | conn->viewer_session->current_trace_chunk, | |
1555 | &vchunk_id) != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
1556 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); | |
1557 | goto send_reply; | |
1558 | } | |
1559 | ||
1560 | if (rchunk_id != vchunk_id) { | |
1561 | DBG("Relay and viewer chunk ids differ: " | |
1562 | "rchunk_id %" PRIu64 " vchunk_id %" PRIu64, | |
1563 | rchunk_id, vchunk_id); | |
1564 | ||
1565 | lttng_trace_chunk_put( | |
1566 | conn->viewer_session->current_trace_chunk); | |
1567 | conn->viewer_session->current_trace_chunk = NULL; | |
1568 | ret = viewer_session_set_trace_chunk_copy( | |
1569 | conn->viewer_session, | |
1570 | rstream->trace_chunk); | |
1571 | if (ret) { | |
1572 | viewer_index.status = | |
1573 | htobe32(LTTNG_VIEWER_INDEX_ERR); | |
1574 | goto send_reply; | |
1575 | } | |
d3e2ba59 | 1576 | } |
b0d240a2 MD |
1577 | } |
1578 | if (conn->viewer_session->current_trace_chunk != | |
1579 | vstream->stream_file.trace_chunk) { | |
1580 | bool acquired_reference; | |
1581 | ||
1582 | DBG("Viewer session and viewer stream chunk differ: " | |
1583 | "vsession chunk %p vstream chunk %p", | |
1584 | conn->viewer_session->current_trace_chunk, | |
1585 | vstream->stream_file.trace_chunk); | |
1586 | lttng_trace_chunk_put(vstream->stream_file.trace_chunk); | |
1587 | acquired_reference = lttng_trace_chunk_get(conn->viewer_session->current_trace_chunk); | |
1588 | assert(acquired_reference); | |
1589 | vstream->stream_file.trace_chunk = | |
1590 | conn->viewer_session->current_trace_chunk; | |
1591 | viewer_stream_sync_tracefile_array_tail(vstream); | |
1592 | viewer_stream_close_files(vstream); | |
d3e2ba59 JD |
1593 | } |
1594 | ||
878c34cf | 1595 | ret = check_index_status(vstream, rstream, ctf_trace, &viewer_index); |
878c34cf | 1596 | if (ret < 0) { |
7591bab1 | 1597 | goto error_put; |
878c34cf DG |
1598 | } else if (ret == 1) { |
1599 | /* | |
7591bab1 MD |
1600 | * We have no index to send and check_index_status has populated |
1601 | * viewer_index's status. | |
878c34cf | 1602 | */ |
d3e2ba59 JD |
1603 | goto send_reply; |
1604 | } | |
7591bab1 | 1605 | /* At this point, ret is 0 thus we will be able to read the index. */ |
878c34cf | 1606 | assert(!ret); |
d3e2ba59 | 1607 | |
b0d240a2 MD |
1608 | /* Try to open an index if one is needed for that stream. */ |
1609 | ret = try_open_index(vstream, rstream); | |
1610 | if (ret == -ENOENT) { | |
1611 | if (rstream->closed) { | |
1612 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_HUP); | |
1613 | goto send_reply; | |
1614 | } else { | |
1615 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_RETRY); | |
1616 | goto send_reply; | |
1617 | } | |
1618 | } | |
1619 | if (ret < 0) { | |
1620 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); | |
1621 | goto send_reply; | |
1622 | } | |
1623 | ||
7591bab1 MD |
1624 | /* |
1625 | * vstream->stream_fd may be NULL if it has been closed by | |
1626 | * tracefile rotation, or if we are at the beginning of the | |
1627 | * stream. We open the data stream file here to protect against | |
1628 | * overwrite caused by tracefile rotation (in association with | |
1629 | * unlink performed before overwrite). | |
1630 | */ | |
8bb66c3c | 1631 | if (!vstream->stream_file.handle) { |
ebb29c10 JG |
1632 | char file_path[LTTNG_PATH_MAX]; |
1633 | enum lttng_trace_chunk_status status; | |
8bb66c3c | 1634 | struct fs_handle *fs_handle; |
ebb29c10 JG |
1635 | |
1636 | ret = utils_stream_file_path(rstream->path_name, | |
1637 | rstream->channel_name, rstream->tracefile_size, | |
1638 | vstream->current_tracefile_id, NULL, file_path, | |
1639 | sizeof(file_path)); | |
7591bab1 MD |
1640 | if (ret < 0) { |
1641 | goto error_put; | |
1642 | } | |
ebb29c10 | 1643 | |
3ff5c5db MD |
1644 | /* |
1645 | * It is possible the the file we are trying to open is | |
1646 | * missing if the stream has been closed (application exits with | |
1647 | * per-pid buffers) and a clear command has been performed. | |
1648 | */ | |
8bb66c3c | 1649 | status = lttng_trace_chunk_open_fs_handle( |
ebb29c10 | 1650 | vstream->stream_file.trace_chunk, |
8bb66c3c | 1651 | file_path, O_RDONLY, 0, &fs_handle, true); |
ebb29c10 | 1652 | if (status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
b0d240a2 MD |
1653 | if (status == LTTNG_TRACE_CHUNK_STATUS_NO_FILE && |
1654 | rstream->closed) { | |
1655 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_HUP); | |
1656 | goto send_reply; | |
1657 | } | |
ebb29c10 | 1658 | PERROR("Failed to open trace file for viewer stream"); |
7591bab1 MD |
1659 | goto error_put; |
1660 | } | |
8bb66c3c | 1661 | vstream->stream_file.handle = fs_handle; |
d3e2ba59 JD |
1662 | } |
1663 | ||
f04a971b | 1664 | ret = check_new_streams(conn); |
4a9daf17 | 1665 | if (ret < 0) { |
7591bab1 MD |
1666 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
1667 | goto send_reply; | |
4a9daf17 JD |
1668 | } else if (ret == 1) { |
1669 | viewer_index.flags |= LTTNG_VIEWER_FLAG_NEW_STREAM; | |
1670 | } | |
1671 | ||
f8f3885c MD |
1672 | ret = lttng_index_file_read(vstream->index_file, &packet_index); |
1673 | if (ret) { | |
8bb66c3c | 1674 | ERR("Relay error reading index file"); |
7591bab1 | 1675 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
6b6b9a5a | 1676 | goto send_reply; |
d3e2ba59 | 1677 | } else { |
c4e361a4 | 1678 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_OK); |
a44ca2ca | 1679 | vstream->index_sent_seqcount++; |
d3e2ba59 JD |
1680 | } |
1681 | ||
1682 | /* | |
1683 | * Indexes are stored in big endian, no need to switch before sending. | |
1684 | */ | |
7591bab1 MD |
1685 | DBG("Sending viewer index for stream %" PRIu64 " offset %" PRIu64, |
1686 | rstream->stream_handle, | |
9b9f9f94 | 1687 | (uint64_t) be64toh(packet_index.offset)); |
d3e2ba59 JD |
1688 | viewer_index.offset = packet_index.offset; |
1689 | viewer_index.packet_size = packet_index.packet_size; | |
1690 | viewer_index.content_size = packet_index.content_size; | |
1691 | viewer_index.timestamp_begin = packet_index.timestamp_begin; | |
1692 | viewer_index.timestamp_end = packet_index.timestamp_end; | |
1693 | viewer_index.events_discarded = packet_index.events_discarded; | |
1694 | viewer_index.stream_id = packet_index.stream_id; | |
1695 | ||
1696 | send_reply: | |
f1883937 MD |
1697 | if (rstream) { |
1698 | pthread_mutex_unlock(&rstream->lock); | |
1699 | } | |
7591bab1 MD |
1700 | |
1701 | if (metadata_viewer_stream) { | |
1702 | pthread_mutex_lock(&metadata_viewer_stream->stream->lock); | |
1703 | DBG("get next index metadata check: recv %" PRIu64 | |
1704 | " sent %" PRIu64, | |
1705 | metadata_viewer_stream->stream->metadata_received, | |
1706 | metadata_viewer_stream->metadata_sent); | |
1707 | if (!metadata_viewer_stream->stream->metadata_received || | |
1708 | metadata_viewer_stream->stream->metadata_received > | |
1709 | metadata_viewer_stream->metadata_sent) { | |
1710 | viewer_index.flags |= LTTNG_VIEWER_FLAG_NEW_METADATA; | |
1711 | } | |
1712 | pthread_mutex_unlock(&metadata_viewer_stream->stream->lock); | |
1713 | } | |
1714 | ||
d3e2ba59 | 1715 | viewer_index.flags = htobe32(viewer_index.flags); |
eea7556c | 1716 | health_code_update(); |
2f8f53af | 1717 | |
58eb9381 | 1718 | ret = send_response(conn->sock, &viewer_index, sizeof(viewer_index)); |
d3e2ba59 | 1719 | if (ret < 0) { |
7591bab1 | 1720 | goto end; |
d3e2ba59 | 1721 | } |
eea7556c | 1722 | health_code_update(); |
d3e2ba59 | 1723 | |
9237e6a1 MD |
1724 | if (vstream) { |
1725 | DBG("Index %" PRIu64 " for stream %" PRIu64 " sent", | |
a44ca2ca | 1726 | vstream->index_sent_seqcount, |
9237e6a1 MD |
1727 | vstream->stream->stream_handle); |
1728 | } | |
d3e2ba59 | 1729 | end: |
7591bab1 MD |
1730 | if (metadata_viewer_stream) { |
1731 | viewer_stream_put(metadata_viewer_stream); | |
1732 | } | |
1733 | if (vstream) { | |
1734 | viewer_stream_put(vstream); | |
1735 | } | |
1736 | return ret; | |
1737 | ||
1738 | error_put: | |
1739 | pthread_mutex_unlock(&rstream->lock); | |
1740 | if (metadata_viewer_stream) { | |
1741 | viewer_stream_put(metadata_viewer_stream); | |
1742 | } | |
1743 | viewer_stream_put(vstream); | |
d3e2ba59 JD |
1744 | return ret; |
1745 | } | |
1746 | ||
1747 | /* | |
1748 | * Send the next index for a stream | |
1749 | * | |
1750 | * Return 0 on success or else a negative value. | |
1751 | */ | |
1752 | static | |
58eb9381 | 1753 | int viewer_get_packet(struct relay_connection *conn) |
d3e2ba59 | 1754 | { |
b6025e94 | 1755 | int ret; |
a5df8828 | 1756 | off_t lseek_ret; |
553b2adb | 1757 | char *reply = NULL; |
d3e2ba59 | 1758 | struct lttng_viewer_get_packet get_packet_info; |
553b2adb | 1759 | struct lttng_viewer_trace_packet reply_header; |
7591bab1 | 1760 | struct relay_viewer_stream *vstream = NULL; |
553b2adb | 1761 | uint32_t reply_size = sizeof(reply_header); |
b6025e94 JR |
1762 | uint32_t packet_data_len = 0; |
1763 | ssize_t read_len; | |
8bb66c3c | 1764 | uint64_t stream_id; |
d3e2ba59 JD |
1765 | |
1766 | DBG2("Relay get data packet"); | |
1767 | ||
eea7556c | 1768 | health_code_update(); |
2f8f53af | 1769 | |
7591bab1 MD |
1770 | ret = recv_request(conn->sock, &get_packet_info, |
1771 | sizeof(get_packet_info)); | |
2f8f53af | 1772 | if (ret < 0) { |
d3e2ba59 JD |
1773 | goto end; |
1774 | } | |
eea7556c | 1775 | health_code_update(); |
d3e2ba59 | 1776 | |
0233a6a5 | 1777 | /* From this point on, the error label can be reached. */ |
553b2adb | 1778 | memset(&reply_header, 0, sizeof(reply_header)); |
8bb66c3c | 1779 | stream_id = (uint64_t) be64toh(get_packet_info.stream_id); |
0233a6a5 | 1780 | |
8bb66c3c | 1781 | vstream = viewer_stream_get_by_id(stream_id); |
7591bab1 | 1782 | if (!vstream) { |
a44ca2ca | 1783 | DBG("Client requested packet of unknown stream id %" PRIu64, |
8bb66c3c | 1784 | stream_id); |
553b2adb JG |
1785 | reply_header.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); |
1786 | goto send_reply_nolock; | |
b6025e94 JR |
1787 | } else { |
1788 | packet_data_len = be32toh(get_packet_info.len); | |
553b2adb | 1789 | reply_size += packet_data_len; |
d3e2ba59 | 1790 | } |
2a174661 | 1791 | |
553b2adb JG |
1792 | reply = zmalloc(reply_size); |
1793 | if (!reply) { | |
1794 | PERROR("packet reply zmalloc"); | |
1795 | reply_size = sizeof(reply_header); | |
d3e2ba59 JD |
1796 | goto error; |
1797 | } | |
1798 | ||
b6025e94 | 1799 | pthread_mutex_lock(&vstream->stream->lock); |
8bb66c3c | 1800 | lseek_ret = fs_handle_seek(vstream->stream_file.handle, |
ebb29c10 | 1801 | be64toh(get_packet_info.offset), SEEK_SET); |
a5df8828 | 1802 | if (lseek_ret < 0) { |
8bb66c3c JG |
1803 | PERROR("Failed to seek file system handle of viewer stream %" PRIu64 |
1804 | " to offset %" PRIu64, | |
1805 | stream_id, | |
ebb29c10 | 1806 | (uint64_t) be64toh(get_packet_info.offset)); |
7591bab1 | 1807 | goto error; |
d3e2ba59 | 1808 | } |
8bb66c3c | 1809 | read_len = fs_handle_read(vstream->stream_file.handle, |
ebb29c10 | 1810 | reply + sizeof(reply_header), packet_data_len); |
b6025e94 | 1811 | if (read_len < packet_data_len) { |
8bb66c3c JG |
1812 | PERROR("Failed to read from file system handle of viewer stream id %" PRIu64 |
1813 | ", offset: %" PRIu64, | |
1814 | stream_id, | |
9b9f9f94 | 1815 | (uint64_t) be64toh(get_packet_info.offset)); |
7591bab1 | 1816 | goto error; |
d3e2ba59 | 1817 | } |
553b2adb JG |
1818 | reply_header.status = htobe32(LTTNG_VIEWER_GET_PACKET_OK); |
1819 | reply_header.len = htobe32(packet_data_len); | |
d3e2ba59 JD |
1820 | goto send_reply; |
1821 | ||
1822 | error: | |
553b2adb | 1823 | reply_header.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); |
d3e2ba59 JD |
1824 | |
1825 | send_reply: | |
7591bab1 MD |
1826 | if (vstream) { |
1827 | pthread_mutex_unlock(&vstream->stream->lock); | |
1828 | } | |
1829 | send_reply_nolock: | |
eea7556c MD |
1830 | |
1831 | health_code_update(); | |
2f8f53af | 1832 | |
553b2adb JG |
1833 | if (reply) { |
1834 | memcpy(reply, &reply_header, sizeof(reply_header)); | |
1835 | ret = send_response(conn->sock, reply, reply_size); | |
1836 | } else { | |
1837 | /* No reply to send. */ | |
1838 | ret = send_response(conn->sock, &reply_header, | |
1839 | reply_size); | |
1840 | } | |
1841 | ||
b6025e94 | 1842 | health_code_update(); |
d3e2ba59 | 1843 | if (ret < 0) { |
b6025e94 | 1844 | PERROR("sendmsg of packet data failed"); |
7591bab1 | 1845 | goto end_free; |
d3e2ba59 | 1846 | } |
d3e2ba59 | 1847 | |
8bb66c3c | 1848 | DBG("Sent %u bytes for stream %" PRIu64, reply_size, stream_id); |
d3e2ba59 | 1849 | |
7591bab1 | 1850 | end_free: |
553b2adb | 1851 | free(reply); |
d3e2ba59 | 1852 | end: |
7591bab1 MD |
1853 | if (vstream) { |
1854 | viewer_stream_put(vstream); | |
1855 | } | |
d3e2ba59 JD |
1856 | return ret; |
1857 | } | |
1858 | ||
1859 | /* | |
1860 | * Send the session's metadata | |
1861 | * | |
1862 | * Return 0 on success else a negative value. | |
1863 | */ | |
1864 | static | |
58eb9381 | 1865 | int viewer_get_metadata(struct relay_connection *conn) |
d3e2ba59 JD |
1866 | { |
1867 | int ret = 0; | |
8bb66c3c | 1868 | int fd = -1; |
d3e2ba59 JD |
1869 | ssize_t read_len; |
1870 | uint64_t len = 0; | |
1871 | char *data = NULL; | |
1872 | struct lttng_viewer_get_metadata request; | |
1873 | struct lttng_viewer_metadata_packet reply; | |
7591bab1 | 1874 | struct relay_viewer_stream *vstream = NULL; |
d3e2ba59 | 1875 | |
58eb9381 | 1876 | assert(conn); |
d3e2ba59 JD |
1877 | |
1878 | DBG("Relay get metadata"); | |
1879 | ||
eea7556c | 1880 | health_code_update(); |
2f8f53af | 1881 | |
58eb9381 | 1882 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 1883 | if (ret < 0) { |
d3e2ba59 JD |
1884 | goto end; |
1885 | } | |
eea7556c | 1886 | health_code_update(); |
d3e2ba59 | 1887 | |
53efb85a MD |
1888 | memset(&reply, 0, sizeof(reply)); |
1889 | ||
7591bab1 MD |
1890 | vstream = viewer_stream_get_by_id(be64toh(request.stream_id)); |
1891 | if (!vstream) { | |
3b463131 MD |
1892 | /* |
1893 | * The metadata stream can be closed by a CLOSE command | |
1894 | * just before we attach. It can also be closed by | |
1895 | * per-pid tracing during tracing. Therefore, it is | |
1896 | * possible that we cannot find this viewer stream. | |
1897 | * Reply back to the client with an error if we cannot | |
1898 | * find it. | |
1899 | */ | |
a44ca2ca | 1900 | DBG("Client requested metadata of unknown stream id %" PRIu64, |
9b9f9f94 | 1901 | (uint64_t) be64toh(request.stream_id)); |
3b463131 | 1902 | reply.status = htobe32(LTTNG_VIEWER_METADATA_ERR); |
7591bab1 | 1903 | goto send_reply; |
d3e2ba59 | 1904 | } |
7591bab1 MD |
1905 | pthread_mutex_lock(&vstream->stream->lock); |
1906 | if (!vstream->stream->is_metadata) { | |
1907 | ERR("Invalid metadata stream"); | |
6763619c JD |
1908 | goto error; |
1909 | } | |
1910 | ||
b0d240a2 | 1911 | if (vstream->metadata_sent >= vstream->stream->metadata_received) { |
94f73d08 MD |
1912 | /* |
1913 | * The live viewers expect to receive a NO_NEW_METADATA | |
1914 | * status before a stream disappears, otherwise they abort the | |
1915 | * entire live connection when receiving an error status. | |
b0d240a2 MD |
1916 | * |
1917 | * Clear feature resets the metadata_sent to 0 until the | |
1918 | * same metadata is received again. | |
94f73d08 | 1919 | */ |
c4e361a4 | 1920 | reply.status = htobe32(LTTNG_VIEWER_NO_NEW_METADATA); |
94f73d08 MD |
1921 | /* |
1922 | * The live viewer considers a closed 0 byte metadata stream as | |
1923 | * an error. | |
1924 | */ | |
1925 | if (vstream->metadata_sent > 0) { | |
1926 | vstream->stream->no_new_metadata_notified = true; | |
1927 | if (vstream->stream->closed) { | |
1928 | /* Release ownership for the viewer metadata stream. */ | |
1929 | viewer_stream_put(vstream); | |
1930 | } | |
1931 | } | |
d3e2ba59 JD |
1932 | goto send_reply; |
1933 | } | |
1934 | ||
b0d240a2 MD |
1935 | len = vstream->stream->metadata_received - vstream->metadata_sent; |
1936 | ||
d3e2ba59 | 1937 | /* first time, we open the metadata file */ |
8bb66c3c JG |
1938 | if (!vstream->stream_file.handle) { |
1939 | struct fs_handle *fs_handle; | |
ebb29c10 JG |
1940 | char file_path[LTTNG_PATH_MAX]; |
1941 | enum lttng_trace_chunk_status status; | |
1942 | struct relay_stream *rstream = vstream->stream; | |
1943 | ||
1944 | ret = utils_stream_file_path(rstream->path_name, | |
1945 | rstream->channel_name, rstream->tracefile_size, | |
1946 | vstream->current_tracefile_id, NULL, file_path, | |
1947 | sizeof(file_path)); | |
d3e2ba59 JD |
1948 | if (ret < 0) { |
1949 | goto error; | |
1950 | } | |
ebb29c10 | 1951 | |
3ff5c5db MD |
1952 | /* |
1953 | * It is possible the the metadata file we are trying to open is | |
1954 | * missing if the stream has been closed (application exits with | |
1955 | * per-pid buffers) and a clear command has been performed. | |
1956 | */ | |
8bb66c3c | 1957 | status = lttng_trace_chunk_open_fs_handle( |
ebb29c10 | 1958 | vstream->stream_file.trace_chunk, |
8bb66c3c | 1959 | file_path, O_RDONLY, 0, &fs_handle, true); |
ebb29c10 | 1960 | if (status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
b0d240a2 MD |
1961 | if (status == LTTNG_TRACE_CHUNK_STATUS_NO_FILE) { |
1962 | reply.status = htobe32(LTTNG_VIEWER_NO_NEW_METADATA); | |
1963 | len = 0; | |
1964 | if (vstream->stream->closed) { | |
1965 | viewer_stream_put(vstream); | |
1966 | } | |
1967 | goto send_reply; | |
1968 | } | |
ebb29c10 | 1969 | PERROR("Failed to open metadata file for viewer stream"); |
d3e2ba59 JD |
1970 | goto error; |
1971 | } | |
8bb66c3c | 1972 | vstream->stream_file.handle = fs_handle; |
d3e2ba59 JD |
1973 | } |
1974 | ||
1975 | reply.len = htobe64(len); | |
1976 | data = zmalloc(len); | |
1977 | if (!data) { | |
1978 | PERROR("viewer metadata zmalloc"); | |
1979 | goto error; | |
1980 | } | |
1981 | ||
8bb66c3c JG |
1982 | fd = fs_handle_get_fd(vstream->stream_file.handle); |
1983 | if (fd < 0) { | |
1984 | ERR("Failed to restore viewer stream file system handle"); | |
1985 | goto error; | |
1986 | } | |
1987 | read_len = lttng_read(fd, data, len); | |
1988 | fs_handle_put_fd(vstream->stream_file.handle); | |
1989 | fd = -1; | |
6cd525e8 | 1990 | if (read_len < len) { |
d3e2ba59 JD |
1991 | PERROR("Relay reading metadata file"); |
1992 | goto error; | |
1993 | } | |
7591bab1 | 1994 | vstream->metadata_sent += read_len; |
c4e361a4 | 1995 | reply.status = htobe32(LTTNG_VIEWER_METADATA_OK); |
7591bab1 | 1996 | |
d3e2ba59 JD |
1997 | goto send_reply; |
1998 | ||
1999 | error: | |
c4e361a4 | 2000 | reply.status = htobe32(LTTNG_VIEWER_METADATA_ERR); |
d3e2ba59 JD |
2001 | |
2002 | send_reply: | |
eea7556c | 2003 | health_code_update(); |
7591bab1 MD |
2004 | if (vstream) { |
2005 | pthread_mutex_unlock(&vstream->stream->lock); | |
2006 | } | |
58eb9381 | 2007 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 2008 | if (ret < 0) { |
7591bab1 | 2009 | goto end_free; |
d3e2ba59 | 2010 | } |
eea7556c | 2011 | health_code_update(); |
d3e2ba59 JD |
2012 | |
2013 | if (len > 0) { | |
58eb9381 | 2014 | ret = send_response(conn->sock, data, len); |
d3e2ba59 | 2015 | if (ret < 0) { |
7591bab1 | 2016 | goto end_free; |
d3e2ba59 JD |
2017 | } |
2018 | } | |
2019 | ||
2020 | DBG("Sent %" PRIu64 " bytes of metadata for stream %" PRIu64, len, | |
9b9f9f94 | 2021 | (uint64_t) be64toh(request.stream_id)); |
d3e2ba59 JD |
2022 | |
2023 | DBG("Metadata sent"); | |
2024 | ||
7591bab1 | 2025 | end_free: |
d3e2ba59 | 2026 | free(data); |
d3e2ba59 | 2027 | end: |
7591bab1 MD |
2028 | if (vstream) { |
2029 | viewer_stream_put(vstream); | |
2030 | } | |
d3e2ba59 JD |
2031 | return ret; |
2032 | } | |
2033 | ||
c3b7390b JD |
2034 | /* |
2035 | * Create a viewer session. | |
2036 | * | |
2037 | * Return 0 on success or else a negative value. | |
2038 | */ | |
2039 | static | |
2040 | int viewer_create_session(struct relay_connection *conn) | |
2041 | { | |
2042 | int ret; | |
2043 | struct lttng_viewer_create_session_response resp; | |
2044 | ||
2045 | DBG("Viewer create session received"); | |
2046 | ||
53efb85a | 2047 | memset(&resp, 0, sizeof(resp)); |
c3b7390b | 2048 | resp.status = htobe32(LTTNG_VIEWER_CREATE_SESSION_OK); |
7591bab1 | 2049 | conn->viewer_session = viewer_session_create(); |
c3b7390b JD |
2050 | if (!conn->viewer_session) { |
2051 | ERR("Allocation viewer session"); | |
2052 | resp.status = htobe32(LTTNG_VIEWER_CREATE_SESSION_ERR); | |
2053 | goto send_reply; | |
2054 | } | |
c3b7390b JD |
2055 | |
2056 | send_reply: | |
2057 | health_code_update(); | |
2058 | ret = send_response(conn->sock, &resp, sizeof(resp)); | |
2059 | if (ret < 0) { | |
2060 | goto end; | |
2061 | } | |
2062 | health_code_update(); | |
2063 | ret = 0; | |
2064 | ||
2065 | end: | |
2066 | return ret; | |
2067 | } | |
2068 | ||
d62023be JD |
2069 | /* |
2070 | * Detach a viewer session. | |
2071 | * | |
2072 | * Return 0 on success or else a negative value. | |
2073 | */ | |
2074 | static | |
2075 | int viewer_detach_session(struct relay_connection *conn) | |
2076 | { | |
2077 | int ret; | |
2078 | struct lttng_viewer_detach_session_response response; | |
2079 | struct lttng_viewer_detach_session_request request; | |
2080 | struct relay_session *session = NULL; | |
2081 | uint64_t viewer_session_to_close; | |
2082 | ||
2083 | DBG("Viewer detach session received"); | |
2084 | ||
2085 | assert(conn); | |
2086 | ||
2087 | health_code_update(); | |
2088 | ||
2089 | /* Receive the request from the connected client. */ | |
2090 | ret = recv_request(conn->sock, &request, sizeof(request)); | |
2091 | if (ret < 0) { | |
2092 | goto end; | |
2093 | } | |
2094 | viewer_session_to_close = be64toh(request.session_id); | |
2095 | ||
2096 | if (!conn->viewer_session) { | |
2097 | DBG("Client trying to detach before creating a live viewer session"); | |
2098 | response.status = htobe32(LTTNG_VIEWER_DETACH_SESSION_ERR); | |
2099 | goto send_reply; | |
2100 | } | |
2101 | ||
2102 | health_code_update(); | |
2103 | ||
2104 | memset(&response, 0, sizeof(response)); | |
2105 | DBG("Detaching from session ID %" PRIu64, viewer_session_to_close); | |
2106 | ||
2107 | session = session_get_by_id(be64toh(request.session_id)); | |
2108 | if (!session) { | |
2109 | DBG("Relay session %" PRIu64 " not found", | |
9b9f9f94 | 2110 | (uint64_t) be64toh(request.session_id)); |
d62023be JD |
2111 | response.status = htobe32(LTTNG_VIEWER_DETACH_SESSION_UNK); |
2112 | goto send_reply; | |
2113 | } | |
2114 | ||
2115 | ret = viewer_session_is_attached(conn->viewer_session, session); | |
2116 | if (ret != 1) { | |
2117 | DBG("Not attached to this session"); | |
2118 | response.status = htobe32(LTTNG_VIEWER_DETACH_SESSION_ERR); | |
2119 | goto send_reply_put; | |
2120 | } | |
2121 | ||
2122 | viewer_session_close_one_session(conn->viewer_session, session); | |
2123 | response.status = htobe32(LTTNG_VIEWER_DETACH_SESSION_OK); | |
2124 | DBG("Session %" PRIu64 " detached.", viewer_session_to_close); | |
2125 | ||
2126 | send_reply_put: | |
2127 | session_put(session); | |
2128 | ||
2129 | send_reply: | |
2130 | health_code_update(); | |
2131 | ret = send_response(conn->sock, &response, sizeof(response)); | |
2132 | if (ret < 0) { | |
2133 | goto end; | |
2134 | } | |
2135 | health_code_update(); | |
2136 | ret = 0; | |
2137 | ||
2138 | end: | |
2139 | return ret; | |
2140 | } | |
c3b7390b | 2141 | |
d3e2ba59 JD |
2142 | /* |
2143 | * live_relay_unknown_command: send -1 if received unknown command | |
2144 | */ | |
2145 | static | |
58eb9381 | 2146 | void live_relay_unknown_command(struct relay_connection *conn) |
d3e2ba59 JD |
2147 | { |
2148 | struct lttcomm_relayd_generic_reply reply; | |
d3e2ba59 | 2149 | |
53efb85a | 2150 | memset(&reply, 0, sizeof(reply)); |
d3e2ba59 | 2151 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
58eb9381 | 2152 | (void) send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 JD |
2153 | } |
2154 | ||
2155 | /* | |
2156 | * Process the commands received on the control socket | |
2157 | */ | |
2158 | static | |
2159 | int process_control(struct lttng_viewer_cmd *recv_hdr, | |
58eb9381 | 2160 | struct relay_connection *conn) |
d3e2ba59 JD |
2161 | { |
2162 | int ret = 0; | |
2f8f53af DG |
2163 | uint32_t msg_value; |
2164 | ||
2f8f53af DG |
2165 | msg_value = be32toh(recv_hdr->cmd); |
2166 | ||
2167 | /* | |
2168 | * Make sure we've done the version check before any command other then a | |
2169 | * new client connection. | |
2170 | */ | |
c4e361a4 | 2171 | if (msg_value != LTTNG_VIEWER_CONNECT && !conn->version_check_done) { |
58eb9381 | 2172 | ERR("Viewer conn value %" PRIu32 " before version check", msg_value); |
2f8f53af DG |
2173 | ret = -1; |
2174 | goto end; | |
2175 | } | |
d3e2ba59 | 2176 | |
2f8f53af | 2177 | switch (msg_value) { |
c4e361a4 | 2178 | case LTTNG_VIEWER_CONNECT: |
58eb9381 | 2179 | ret = viewer_connect(conn); |
d3e2ba59 | 2180 | break; |
c4e361a4 | 2181 | case LTTNG_VIEWER_LIST_SESSIONS: |
58eb9381 | 2182 | ret = viewer_list_sessions(conn); |
d3e2ba59 | 2183 | break; |
c4e361a4 | 2184 | case LTTNG_VIEWER_ATTACH_SESSION: |
58eb9381 | 2185 | ret = viewer_attach_session(conn); |
d3e2ba59 | 2186 | break; |
c4e361a4 | 2187 | case LTTNG_VIEWER_GET_NEXT_INDEX: |
58eb9381 | 2188 | ret = viewer_get_next_index(conn); |
d3e2ba59 | 2189 | break; |
c4e361a4 | 2190 | case LTTNG_VIEWER_GET_PACKET: |
58eb9381 | 2191 | ret = viewer_get_packet(conn); |
d3e2ba59 | 2192 | break; |
c4e361a4 | 2193 | case LTTNG_VIEWER_GET_METADATA: |
58eb9381 | 2194 | ret = viewer_get_metadata(conn); |
d3e2ba59 | 2195 | break; |
c4e361a4 | 2196 | case LTTNG_VIEWER_GET_NEW_STREAMS: |
58eb9381 | 2197 | ret = viewer_get_new_streams(conn); |
80e8027a | 2198 | break; |
c3b7390b JD |
2199 | case LTTNG_VIEWER_CREATE_SESSION: |
2200 | ret = viewer_create_session(conn); | |
2201 | break; | |
d62023be JD |
2202 | case LTTNG_VIEWER_DETACH_SESSION: |
2203 | ret = viewer_detach_session(conn); | |
2204 | break; | |
d3e2ba59 | 2205 | default: |
7591bab1 MD |
2206 | ERR("Received unknown viewer command (%u)", |
2207 | be32toh(recv_hdr->cmd)); | |
58eb9381 | 2208 | live_relay_unknown_command(conn); |
d3e2ba59 JD |
2209 | ret = -1; |
2210 | goto end; | |
2211 | } | |
2212 | ||
2213 | end: | |
2214 | return ret; | |
2215 | } | |
2216 | ||
2217 | static | |
58eb9381 | 2218 | void cleanup_connection_pollfd(struct lttng_poll_event *events, int pollfd) |
d3e2ba59 JD |
2219 | { |
2220 | int ret; | |
2221 | ||
58eb9381 | 2222 | (void) lttng_poll_del(events, pollfd); |
d3e2ba59 | 2223 | |
29555a78 JG |
2224 | ret = fd_tracker_close_unsuspendable_fd(the_fd_tracker, &pollfd, 1, |
2225 | fd_tracker_util_close_fd, NULL); | |
d3e2ba59 JD |
2226 | if (ret < 0) { |
2227 | ERR("Closing pollfd %d", pollfd); | |
2228 | } | |
2229 | } | |
2230 | ||
d3e2ba59 JD |
2231 | /* |
2232 | * This thread does the actual work | |
2233 | */ | |
2234 | static | |
2235 | void *thread_worker(void *data) | |
2236 | { | |
2237 | int ret, err = -1; | |
2238 | uint32_t nb_fd; | |
d3e2ba59 | 2239 | struct lttng_poll_event events; |
7591bab1 | 2240 | struct lttng_ht *viewer_connections_ht; |
d3e2ba59 JD |
2241 | struct lttng_ht_iter iter; |
2242 | struct lttng_viewer_cmd recv_hdr; | |
302d8906 | 2243 | struct relay_connection *destroy_conn; |
d3e2ba59 JD |
2244 | |
2245 | DBG("[thread] Live viewer relay worker started"); | |
2246 | ||
2247 | rcu_register_thread(); | |
2248 | ||
eea7556c MD |
2249 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_WORKER); |
2250 | ||
9b5e0863 MD |
2251 | if (testpoint(relayd_thread_live_worker)) { |
2252 | goto error_testpoint; | |
2253 | } | |
2254 | ||
d3e2ba59 | 2255 | /* table of connections indexed on socket */ |
7591bab1 MD |
2256 | viewer_connections_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
2257 | if (!viewer_connections_ht) { | |
2258 | goto viewer_connections_ht_error; | |
d3e2ba59 JD |
2259 | } |
2260 | ||
35bc1f58 JG |
2261 | ret = create_named_thread_poll_set(&events, 2, |
2262 | "Live viewer worker thread epoll"); | |
d3e2ba59 JD |
2263 | if (ret < 0) { |
2264 | goto error_poll_create; | |
2265 | } | |
2266 | ||
58eb9381 | 2267 | ret = lttng_poll_add(&events, live_conn_pipe[0], LPOLLIN | LPOLLRDHUP); |
d3e2ba59 JD |
2268 | if (ret < 0) { |
2269 | goto error; | |
2270 | } | |
2271 | ||
2272 | restart: | |
2273 | while (1) { | |
2274 | int i; | |
2275 | ||
eea7556c MD |
2276 | health_code_update(); |
2277 | ||
d3e2ba59 JD |
2278 | /* Infinite blocking call, waiting for transmission */ |
2279 | DBG3("Relayd live viewer worker thread polling..."); | |
eea7556c | 2280 | health_poll_entry(); |
d3e2ba59 | 2281 | ret = lttng_poll_wait(&events, -1); |
eea7556c | 2282 | health_poll_exit(); |
d3e2ba59 JD |
2283 | if (ret < 0) { |
2284 | /* | |
2285 | * Restart interrupted system call. | |
2286 | */ | |
2287 | if (errno == EINTR) { | |
2288 | goto restart; | |
2289 | } | |
2290 | goto error; | |
2291 | } | |
2292 | ||
2293 | nb_fd = ret; | |
2294 | ||
2295 | /* | |
2296 | * Process control. The control connection is prioritised so we don't | |
2297 | * starve it with high throughput tracing data on the data | |
2298 | * connection. | |
2299 | */ | |
2300 | for (i = 0; i < nb_fd; i++) { | |
2301 | /* Fetch once the poll data */ | |
2302 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
2303 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
2304 | ||
eea7556c MD |
2305 | health_code_update(); |
2306 | ||
d3e2ba59 | 2307 | /* Thread quit pipe has been closed. Killing thread. */ |
bcf4a440 | 2308 | ret = check_thread_quit_pipe(pollfd, revents); |
d3e2ba59 JD |
2309 | if (ret) { |
2310 | err = 0; | |
2311 | goto exit; | |
2312 | } | |
2313 | ||
7591bab1 | 2314 | /* Inspect the relay conn pipe for new connection. */ |
58eb9381 | 2315 | if (pollfd == live_conn_pipe[0]) { |
03e43155 | 2316 | if (revents & LPOLLIN) { |
302d8906 JG |
2317 | struct relay_connection *conn; |
2318 | ||
7591bab1 MD |
2319 | ret = lttng_read(live_conn_pipe[0], |
2320 | &conn, sizeof(conn)); | |
d3e2ba59 JD |
2321 | if (ret < 0) { |
2322 | goto error; | |
2323 | } | |
73039936 FD |
2324 | ret = lttng_poll_add(&events, |
2325 | conn->sock->fd, | |
58eb9381 | 2326 | LPOLLIN | LPOLLRDHUP); |
73039936 FD |
2327 | if (ret) { |
2328 | ERR("Failed to add new live connection file descriptor to poll set"); | |
2329 | goto error; | |
2330 | } | |
7591bab1 MD |
2331 | connection_ht_add(viewer_connections_ht, conn); |
2332 | DBG("Connection socket %d added to poll", conn->sock->fd); | |
03e43155 MD |
2333 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
2334 | ERR("Relay live pipe error"); | |
2335 | goto error; | |
2336 | } else { | |
2337 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
2338 | goto error; | |
d3e2ba59 | 2339 | } |
58eb9381 | 2340 | } else { |
7591bab1 | 2341 | /* Connection activity. */ |
302d8906 JG |
2342 | struct relay_connection *conn; |
2343 | ||
7591bab1 MD |
2344 | conn = connection_get_by_sock(viewer_connections_ht, pollfd); |
2345 | if (!conn) { | |
2346 | continue; | |
2347 | } | |
58eb9381 | 2348 | |
03e43155 | 2349 | if (revents & LPOLLIN) { |
58eb9381 DG |
2350 | ret = conn->sock->ops->recvmsg(conn->sock, &recv_hdr, |
2351 | sizeof(recv_hdr), 0); | |
d3e2ba59 | 2352 | if (ret <= 0) { |
7591bab1 | 2353 | /* Connection closed. */ |
58eb9381 | 2354 | cleanup_connection_pollfd(&events, pollfd); |
7591bab1 MD |
2355 | /* Put "create" ownership reference. */ |
2356 | connection_put(conn); | |
58eb9381 | 2357 | DBG("Viewer control conn closed with %d", pollfd); |
d3e2ba59 | 2358 | } else { |
58eb9381 | 2359 | ret = process_control(&recv_hdr, conn); |
d3e2ba59 JD |
2360 | if (ret < 0) { |
2361 | /* Clear the session on error. */ | |
58eb9381 | 2362 | cleanup_connection_pollfd(&events, pollfd); |
7591bab1 MD |
2363 | /* Put "create" ownership reference. */ |
2364 | connection_put(conn); | |
d3e2ba59 JD |
2365 | DBG("Viewer connection closed with %d", pollfd); |
2366 | } | |
2367 | } | |
03e43155 MD |
2368 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
2369 | cleanup_connection_pollfd(&events, pollfd); | |
2370 | /* Put "create" ownership reference. */ | |
2371 | connection_put(conn); | |
2372 | } else { | |
2373 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
2374 | connection_put(conn); | |
2375 | goto error; | |
d3e2ba59 | 2376 | } |
7591bab1 MD |
2377 | /* Put local "get_by_sock" reference. */ |
2378 | connection_put(conn); | |
d3e2ba59 JD |
2379 | } |
2380 | } | |
2381 | } | |
2382 | ||
2383 | exit: | |
2384 | error: | |
35bc1f58 | 2385 | (void) fd_tracker_util_poll_clean(the_fd_tracker, &events); |
d3e2ba59 | 2386 | |
71efa8ef | 2387 | /* Cleanup remaining connection object. */ |
d3e2ba59 | 2388 | rcu_read_lock(); |
7591bab1 | 2389 | cds_lfht_for_each_entry(viewer_connections_ht->ht, &iter.iter, |
302d8906 | 2390 | destroy_conn, |
58eb9381 | 2391 | sock_n.node) { |
eea7556c | 2392 | health_code_update(); |
7591bab1 | 2393 | connection_put(destroy_conn); |
d3e2ba59 JD |
2394 | } |
2395 | rcu_read_unlock(); | |
2396 | error_poll_create: | |
7591bab1 MD |
2397 | lttng_ht_destroy(viewer_connections_ht); |
2398 | viewer_connections_ht_error: | |
58eb9381 | 2399 | /* Close relay conn pipes */ |
87bcbe91 | 2400 | (void) fd_tracker_util_pipe_close(the_fd_tracker, live_conn_pipe); |
d3e2ba59 JD |
2401 | if (err) { |
2402 | DBG("Viewer worker thread exited with error"); | |
2403 | } | |
2404 | DBG("Viewer worker thread cleanup complete"); | |
9b5e0863 | 2405 | error_testpoint: |
eea7556c MD |
2406 | if (err) { |
2407 | health_error(); | |
2408 | ERR("Health error occurred in %s", __func__); | |
2409 | } | |
2410 | health_unregister(health_relayd); | |
b4aacfdc MD |
2411 | if (lttng_relay_stop_threads()) { |
2412 | ERR("Error stopping threads"); | |
178a0557 | 2413 | } |
d3e2ba59 JD |
2414 | rcu_unregister_thread(); |
2415 | return NULL; | |
2416 | } | |
2417 | ||
2418 | /* | |
2419 | * Create the relay command pipe to wake thread_manage_apps. | |
2420 | * Closed in cleanup(). | |
2421 | */ | |
58eb9381 | 2422 | static int create_conn_pipe(void) |
d3e2ba59 | 2423 | { |
87bcbe91 JG |
2424 | return fd_tracker_util_pipe_open_cloexec(the_fd_tracker, |
2425 | "Live connection pipe", live_conn_pipe); | |
178a0557 | 2426 | } |
d3e2ba59 | 2427 | |
178a0557 | 2428 | int relayd_live_join(void) |
d3e2ba59 | 2429 | { |
178a0557 | 2430 | int ret, retval = 0; |
d3e2ba59 JD |
2431 | void *status; |
2432 | ||
d3e2ba59 | 2433 | ret = pthread_join(live_listener_thread, &status); |
178a0557 MD |
2434 | if (ret) { |
2435 | errno = ret; | |
d3e2ba59 | 2436 | PERROR("pthread_join live listener"); |
178a0557 | 2437 | retval = -1; |
d3e2ba59 JD |
2438 | } |
2439 | ||
2440 | ret = pthread_join(live_worker_thread, &status); | |
178a0557 MD |
2441 | if (ret) { |
2442 | errno = ret; | |
d3e2ba59 | 2443 | PERROR("pthread_join live worker"); |
178a0557 | 2444 | retval = -1; |
d3e2ba59 JD |
2445 | } |
2446 | ||
2447 | ret = pthread_join(live_dispatcher_thread, &status); | |
178a0557 MD |
2448 | if (ret) { |
2449 | errno = ret; | |
d3e2ba59 | 2450 | PERROR("pthread_join live dispatcher"); |
178a0557 | 2451 | retval = -1; |
d3e2ba59 JD |
2452 | } |
2453 | ||
178a0557 | 2454 | cleanup_relayd_live(); |
d3e2ba59 | 2455 | |
178a0557 | 2456 | return retval; |
d3e2ba59 JD |
2457 | } |
2458 | ||
2459 | /* | |
2460 | * main | |
2461 | */ | |
7591bab1 | 2462 | int relayd_live_create(struct lttng_uri *uri) |
d3e2ba59 | 2463 | { |
178a0557 | 2464 | int ret = 0, retval = 0; |
d3e2ba59 JD |
2465 | void *status; |
2466 | int is_root; | |
2467 | ||
178a0557 MD |
2468 | if (!uri) { |
2469 | retval = -1; | |
2470 | goto exit_init_data; | |
2471 | } | |
d3e2ba59 JD |
2472 | live_uri = uri; |
2473 | ||
d3e2ba59 JD |
2474 | /* Check if daemon is UID = 0 */ |
2475 | is_root = !getuid(); | |
2476 | ||
2477 | if (!is_root) { | |
2478 | if (live_uri->port < 1024) { | |
2479 | ERR("Need to be root to use ports < 1024"); | |
178a0557 MD |
2480 | retval = -1; |
2481 | goto exit_init_data; | |
d3e2ba59 JD |
2482 | } |
2483 | } | |
2484 | ||
2485 | /* Setup the thread apps communication pipe. */ | |
178a0557 MD |
2486 | if (create_conn_pipe()) { |
2487 | retval = -1; | |
2488 | goto exit_init_data; | |
d3e2ba59 JD |
2489 | } |
2490 | ||
2491 | /* Init relay command queue. */ | |
8bdee6e2 | 2492 | cds_wfcq_init(&viewer_conn_queue.head, &viewer_conn_queue.tail); |
d3e2ba59 JD |
2493 | |
2494 | /* Set up max poll set size */ | |
25b397f9 MD |
2495 | if (lttng_poll_set_max_size()) { |
2496 | retval = -1; | |
2497 | goto exit_init_data; | |
2498 | } | |
d3e2ba59 JD |
2499 | |
2500 | /* Setup the dispatcher thread */ | |
1a1a34b4 | 2501 | ret = pthread_create(&live_dispatcher_thread, default_pthread_attr(), |
d3e2ba59 | 2502 | thread_dispatcher, (void *) NULL); |
178a0557 MD |
2503 | if (ret) { |
2504 | errno = ret; | |
d3e2ba59 | 2505 | PERROR("pthread_create viewer dispatcher"); |
178a0557 MD |
2506 | retval = -1; |
2507 | goto exit_dispatcher_thread; | |
d3e2ba59 JD |
2508 | } |
2509 | ||
2510 | /* Setup the worker thread */ | |
1a1a34b4 | 2511 | ret = pthread_create(&live_worker_thread, default_pthread_attr(), |
7591bab1 | 2512 | thread_worker, NULL); |
178a0557 MD |
2513 | if (ret) { |
2514 | errno = ret; | |
d3e2ba59 | 2515 | PERROR("pthread_create viewer worker"); |
178a0557 MD |
2516 | retval = -1; |
2517 | goto exit_worker_thread; | |
d3e2ba59 JD |
2518 | } |
2519 | ||
2520 | /* Setup the listener thread */ | |
1a1a34b4 | 2521 | ret = pthread_create(&live_listener_thread, default_pthread_attr(), |
d3e2ba59 | 2522 | thread_listener, (void *) NULL); |
178a0557 MD |
2523 | if (ret) { |
2524 | errno = ret; | |
d3e2ba59 | 2525 | PERROR("pthread_create viewer listener"); |
178a0557 MD |
2526 | retval = -1; |
2527 | goto exit_listener_thread; | |
d3e2ba59 JD |
2528 | } |
2529 | ||
178a0557 MD |
2530 | /* |
2531 | * All OK, started all threads. | |
2532 | */ | |
2533 | return retval; | |
2534 | ||
9911d21b JG |
2535 | /* |
2536 | * Join on the live_listener_thread should anything be added after | |
2537 | * the live_listener thread's creation. | |
2538 | */ | |
d3e2ba59 | 2539 | |
178a0557 | 2540 | exit_listener_thread: |
d3e2ba59 | 2541 | |
d3e2ba59 | 2542 | ret = pthread_join(live_worker_thread, &status); |
178a0557 MD |
2543 | if (ret) { |
2544 | errno = ret; | |
d3e2ba59 | 2545 | PERROR("pthread_join live worker"); |
178a0557 | 2546 | retval = -1; |
d3e2ba59 | 2547 | } |
178a0557 | 2548 | exit_worker_thread: |
d3e2ba59 | 2549 | |
d3e2ba59 | 2550 | ret = pthread_join(live_dispatcher_thread, &status); |
178a0557 MD |
2551 | if (ret) { |
2552 | errno = ret; | |
d3e2ba59 | 2553 | PERROR("pthread_join live dispatcher"); |
178a0557 | 2554 | retval = -1; |
d3e2ba59 | 2555 | } |
178a0557 | 2556 | exit_dispatcher_thread: |
d3e2ba59 | 2557 | |
178a0557 MD |
2558 | exit_init_data: |
2559 | cleanup_relayd_live(); | |
d3e2ba59 | 2560 | |
178a0557 | 2561 | return retval; |
d3e2ba59 | 2562 | } |