Commit | Line | Data |
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d3e2ba59 JD |
1 | /* |
2 | * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com> | |
3 | * David Goulet <dgoulet@efficios.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License, version 2 only, | |
7 | * as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along | |
15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
17 | */ | |
18 | ||
19 | #define _GNU_SOURCE | |
20 | #include <getopt.h> | |
21 | #include <grp.h> | |
22 | #include <limits.h> | |
23 | #include <pthread.h> | |
24 | #include <signal.h> | |
25 | #include <stdio.h> | |
26 | #include <stdlib.h> | |
27 | #include <string.h> | |
28 | #include <sys/mman.h> | |
29 | #include <sys/mount.h> | |
30 | #include <sys/resource.h> | |
31 | #include <sys/socket.h> | |
32 | #include <sys/stat.h> | |
33 | #include <sys/types.h> | |
34 | #include <sys/wait.h> | |
35 | #include <inttypes.h> | |
36 | #include <urcu/futex.h> | |
37 | #include <urcu/uatomic.h> | |
38 | #include <unistd.h> | |
39 | #include <fcntl.h> | |
40 | #include <config.h> | |
41 | ||
42 | #include <lttng/lttng.h> | |
43 | #include <common/common.h> | |
44 | #include <common/compat/poll.h> | |
45 | #include <common/compat/socket.h> | |
46 | #include <common/defaults.h> | |
47 | #include <common/futex.h> | |
2f8f53af | 48 | #include <common/index/index.h> |
d3e2ba59 JD |
49 | #include <common/sessiond-comm/sessiond-comm.h> |
50 | #include <common/sessiond-comm/inet.h> | |
51 | #include <common/sessiond-comm/relayd.h> | |
52 | #include <common/uri.h> | |
53 | #include <common/utils.h> | |
54 | ||
55 | #include "cmd.h" | |
56 | #include "live.h" | |
57 | #include "lttng-relayd.h" | |
d3e2ba59 | 58 | #include "utils.h" |
eea7556c | 59 | #include "health-relayd.h" |
9b5e0863 | 60 | #include "testpoint.h" |
2f8f53af | 61 | #include "viewer-stream.h" |
2a174661 DG |
62 | #include "stream.h" |
63 | #include "session.h" | |
64 | #include "ctf-trace.h" | |
58eb9381 | 65 | #include "connection.h" |
d3e2ba59 JD |
66 | |
67 | static struct lttng_uri *live_uri; | |
68 | ||
d3e2ba59 JD |
69 | /* |
70 | * This pipe is used to inform the worker thread that a command is queued and | |
71 | * ready to be processed. | |
72 | */ | |
58eb9381 | 73 | static int live_conn_pipe[2] = { -1, -1 }; |
d3e2ba59 JD |
74 | |
75 | /* Shared between threads */ | |
76 | static int live_dispatch_thread_exit; | |
77 | ||
78 | static pthread_t live_listener_thread; | |
79 | static pthread_t live_dispatcher_thread; | |
80 | static pthread_t live_worker_thread; | |
81 | ||
82 | /* | |
83 | * Relay command queue. | |
84 | * | |
85 | * The live_thread_listener and live_thread_dispatcher communicate with this | |
86 | * queue. | |
87 | */ | |
58eb9381 | 88 | static struct relay_conn_queue viewer_conn_queue; |
d3e2ba59 JD |
89 | |
90 | static uint64_t last_relay_viewer_session_id; | |
91 | ||
92 | /* | |
93 | * Cleanup the daemon | |
94 | */ | |
95 | static | |
96 | void cleanup(void) | |
97 | { | |
98 | DBG("Cleaning up"); | |
99 | ||
d3e2ba59 JD |
100 | free(live_uri); |
101 | } | |
102 | ||
2f8f53af DG |
103 | /* |
104 | * Receive a request buffer using a given socket, destination allocated buffer | |
105 | * of length size. | |
106 | * | |
107 | * Return the size of the received message or else a negative value on error | |
108 | * with errno being set by recvmsg() syscall. | |
109 | */ | |
110 | static | |
111 | ssize_t recv_request(struct lttcomm_sock *sock, void *buf, size_t size) | |
112 | { | |
113 | ssize_t ret; | |
114 | ||
115 | assert(sock); | |
116 | assert(buf); | |
117 | ||
118 | ret = sock->ops->recvmsg(sock, buf, size, 0); | |
119 | if (ret < 0 || ret != size) { | |
120 | if (ret == 0) { | |
121 | /* Orderly shutdown. Not necessary to print an error. */ | |
122 | DBG("Socket %d did an orderly shutdown", sock->fd); | |
123 | } else { | |
124 | ERR("Relay failed to receive request."); | |
125 | } | |
126 | ret = -1; | |
127 | } | |
128 | ||
129 | return ret; | |
130 | } | |
131 | ||
132 | /* | |
133 | * Send a response buffer using a given socket, source allocated buffer of | |
134 | * length size. | |
135 | * | |
136 | * Return the size of the sent message or else a negative value on error with | |
137 | * errno being set by sendmsg() syscall. | |
138 | */ | |
139 | static | |
140 | ssize_t send_response(struct lttcomm_sock *sock, void *buf, size_t size) | |
141 | { | |
142 | ssize_t ret; | |
143 | ||
144 | assert(sock); | |
145 | assert(buf); | |
146 | ||
147 | ret = sock->ops->sendmsg(sock, buf, size, 0); | |
148 | if (ret < 0) { | |
149 | ERR("Relayd failed to send response."); | |
150 | } | |
151 | ||
152 | return ret; | |
153 | } | |
154 | ||
155 | /* | |
156 | * Atomically check if new streams got added in the session since the last | |
157 | * check and reset the flag to 0. | |
158 | * | |
159 | * Returns 1 if new streams got added, 0 if nothing changed, a negative value | |
160 | * on error. | |
161 | */ | |
162 | static | |
163 | int check_new_streams(uint64_t session_id, struct lttng_ht *sessions_ht) | |
164 | { | |
165 | int ret; | |
166 | unsigned long current_val; | |
167 | struct relay_session *session; | |
168 | ||
169 | assert(sessions_ht); | |
170 | ||
171 | session = session_find_by_id(sessions_ht, session_id); | |
172 | if (!session) { | |
173 | DBG("Relay session %" PRIu64 " not found", session_id); | |
174 | ret = -1; | |
175 | goto error; | |
176 | } | |
177 | ||
178 | current_val = uatomic_cmpxchg(&session->new_streams, 1, 0); | |
179 | ret = current_val; | |
180 | ||
181 | error: | |
182 | return ret; | |
183 | } | |
184 | ||
185 | /* | |
186 | * Send viewer streams to the given socket. The ignore_sent_flag indicates if | |
187 | * this function should ignore the sent flag or not. | |
188 | * | |
189 | * Return 0 on success or else a negative value. | |
190 | */ | |
191 | static | |
192 | ssize_t send_viewer_streams(struct lttcomm_sock *sock, | |
193 | struct relay_session *session, unsigned int ignore_sent_flag) | |
194 | { | |
195 | ssize_t ret; | |
196 | struct lttng_viewer_stream send_stream; | |
197 | struct lttng_ht_iter iter; | |
198 | struct relay_viewer_stream *vstream; | |
199 | ||
200 | assert(session); | |
201 | ||
202 | rcu_read_lock(); | |
203 | ||
204 | cds_lfht_for_each_entry(viewer_streams_ht->ht, &iter.iter, vstream, | |
205 | stream_n.node) { | |
2a174661 DG |
206 | struct ctf_trace *ctf_trace; |
207 | ||
2f8f53af DG |
208 | health_code_update(); |
209 | ||
210 | /* Ignore if not the same session. */ | |
211 | if (vstream->session_id != session->id || | |
212 | (!ignore_sent_flag && vstream->sent_flag)) { | |
213 | continue; | |
214 | } | |
215 | ||
2a174661 DG |
216 | ctf_trace = ctf_trace_find_by_path(session->ctf_traces_ht, |
217 | vstream->path_name); | |
218 | assert(ctf_trace); | |
219 | ||
2f8f53af | 220 | send_stream.id = htobe64(vstream->stream_handle); |
2a174661 | 221 | send_stream.ctf_trace_id = htobe64(ctf_trace->id); |
2f8f53af DG |
222 | send_stream.metadata_flag = htobe32(vstream->metadata_flag); |
223 | strncpy(send_stream.path_name, vstream->path_name, | |
224 | sizeof(send_stream.path_name)); | |
225 | strncpy(send_stream.channel_name, vstream->channel_name, | |
226 | sizeof(send_stream.channel_name)); | |
227 | ||
228 | DBG("Sending stream %" PRIu64 " to viewer", vstream->stream_handle); | |
229 | ret = send_response(sock, &send_stream, sizeof(send_stream)); | |
230 | if (ret < 0) { | |
231 | goto end_unlock; | |
232 | } | |
233 | vstream->sent_flag = 1; | |
234 | } | |
235 | ||
236 | ret = 0; | |
237 | ||
238 | end_unlock: | |
239 | rcu_read_unlock(); | |
240 | return ret; | |
241 | } | |
242 | ||
243 | /* | |
244 | * Create every viewer stream possible for the given session with the seek | |
245 | * type. Three counters *can* be return which are in order the total amount of | |
246 | * viewer stream of the session, the number of unsent stream and the number of | |
247 | * stream created. Those counters can be NULL and thus will be ignored. | |
248 | * | |
249 | * Return 0 on success or else a negative value. | |
250 | */ | |
251 | static | |
252 | int make_viewer_streams(struct relay_session *session, | |
253 | enum lttng_viewer_seek seek_t, uint32_t *nb_total, uint32_t *nb_unsent, | |
254 | uint32_t *nb_created) | |
255 | { | |
256 | int ret; | |
2f8f53af | 257 | struct lttng_ht_iter iter; |
2a174661 | 258 | struct ctf_trace *ctf_trace; |
2f8f53af DG |
259 | |
260 | assert(session); | |
261 | ||
262 | /* | |
263 | * This is to make sure we create viewer streams for a full received | |
264 | * channel. For instance, if we have 8 streams for a channel that are | |
265 | * concurrently being flagged ready, we can end up creating just a subset | |
266 | * of the 8 streams (the ones that are flagged). This lock avoids this | |
267 | * limbo state. | |
268 | */ | |
269 | pthread_mutex_lock(&session->viewer_ready_lock); | |
270 | ||
271 | /* | |
272 | * Create viewer streams for relay streams that are ready to be used for a | |
273 | * the given session id only. | |
274 | */ | |
2a174661 DG |
275 | rcu_read_lock(); |
276 | cds_lfht_for_each_entry(session->ctf_traces_ht->ht, &iter.iter, ctf_trace, | |
277 | node.node) { | |
278 | struct relay_stream *stream; | |
2f8f53af DG |
279 | |
280 | health_code_update(); | |
281 | ||
2a174661 | 282 | if (ctf_trace->invalid_flag) { |
2f8f53af DG |
283 | continue; |
284 | } | |
285 | ||
2a174661 DG |
286 | cds_list_for_each_entry(stream, &ctf_trace->stream_list, trace_list) { |
287 | struct relay_viewer_stream *vstream; | |
288 | ||
289 | if (!stream->viewer_ready) { | |
290 | continue; | |
291 | } | |
292 | ||
293 | vstream = viewer_stream_find_by_id(stream->stream_handle); | |
2f8f53af | 294 | if (!vstream) { |
2a174661 DG |
295 | vstream = viewer_stream_create(stream, seek_t, ctf_trace); |
296 | if (!vstream) { | |
297 | ret = -1; | |
298 | goto error_unlock; | |
299 | } | |
300 | /* Acquire reference to ctf_trace. */ | |
301 | ctf_trace_get_ref(ctf_trace); | |
302 | ||
303 | if (nb_created) { | |
304 | /* Update number of created stream counter. */ | |
305 | (*nb_created)++; | |
306 | } | |
307 | } else if (!vstream->sent_flag && nb_unsent) { | |
308 | /* Update number of unsent stream counter. */ | |
309 | (*nb_unsent)++; | |
2f8f53af | 310 | } |
2a174661 DG |
311 | /* Update number of total stream counter. */ |
312 | if (nb_total) { | |
313 | (*nb_total)++; | |
2f8f53af | 314 | } |
2f8f53af DG |
315 | } |
316 | } | |
317 | ||
318 | ret = 0; | |
319 | ||
320 | error_unlock: | |
2a174661 | 321 | rcu_read_unlock(); |
2f8f53af DG |
322 | pthread_mutex_unlock(&session->viewer_ready_lock); |
323 | return ret; | |
324 | } | |
325 | ||
d3e2ba59 JD |
326 | /* |
327 | * Write to writable pipe used to notify a thread. | |
328 | */ | |
329 | static | |
330 | int notify_thread_pipe(int wpipe) | |
331 | { | |
6cd525e8 | 332 | ssize_t ret; |
d3e2ba59 | 333 | |
6cd525e8 MD |
334 | ret = lttng_write(wpipe, "!", 1); |
335 | if (ret < 1) { | |
d3e2ba59 JD |
336 | PERROR("write poll pipe"); |
337 | } | |
338 | ||
6cd525e8 | 339 | return (int) ret; |
d3e2ba59 JD |
340 | } |
341 | ||
342 | /* | |
343 | * Stop all threads by closing the thread quit pipe. | |
344 | */ | |
345 | static | |
346 | void stop_threads(void) | |
347 | { | |
348 | int ret; | |
349 | ||
350 | /* Stopping all threads */ | |
351 | DBG("Terminating all live threads"); | |
2a174661 | 352 | ret = notify_thread_pipe(live_conn_pipe[1]); |
d3e2ba59 JD |
353 | if (ret < 0) { |
354 | ERR("write error on thread quit pipe"); | |
355 | } | |
356 | ||
357 | /* Dispatch thread */ | |
358 | CMM_STORE_SHARED(live_dispatch_thread_exit, 1); | |
58eb9381 | 359 | futex_nto1_wake(&viewer_conn_queue.futex); |
d3e2ba59 JD |
360 | } |
361 | ||
d3e2ba59 JD |
362 | /* |
363 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
364 | */ | |
365 | static | |
366 | int create_thread_poll_set(struct lttng_poll_event *events, int size) | |
367 | { | |
368 | int ret; | |
369 | ||
370 | if (events == NULL || size == 0) { | |
371 | ret = -1; | |
372 | goto error; | |
373 | } | |
374 | ||
375 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
376 | if (ret < 0) { | |
377 | goto error; | |
378 | } | |
379 | ||
380 | /* Add quit pipe */ | |
2a174661 | 381 | ret = lttng_poll_add(events, live_conn_pipe[0], LPOLLIN | LPOLLERR); |
d3e2ba59 JD |
382 | if (ret < 0) { |
383 | goto error; | |
384 | } | |
385 | ||
386 | return 0; | |
387 | ||
388 | error: | |
389 | return ret; | |
390 | } | |
391 | ||
392 | /* | |
393 | * Check if the thread quit pipe was triggered. | |
394 | * | |
395 | * Return 1 if it was triggered else 0; | |
396 | */ | |
397 | static | |
2a174661 | 398 | int check_live_conn_pipe(int fd, uint32_t events) |
d3e2ba59 | 399 | { |
2a174661 | 400 | if (fd == live_conn_pipe[0] && (events & LPOLLIN)) { |
d3e2ba59 JD |
401 | return 1; |
402 | } | |
403 | ||
404 | return 0; | |
405 | } | |
406 | ||
407 | /* | |
408 | * Create and init socket from uri. | |
409 | */ | |
410 | static | |
411 | struct lttcomm_sock *init_socket(struct lttng_uri *uri) | |
412 | { | |
413 | int ret; | |
414 | struct lttcomm_sock *sock = NULL; | |
415 | ||
416 | sock = lttcomm_alloc_sock_from_uri(uri); | |
417 | if (sock == NULL) { | |
418 | ERR("Allocating socket"); | |
419 | goto error; | |
420 | } | |
421 | ||
422 | ret = lttcomm_create_sock(sock); | |
423 | if (ret < 0) { | |
424 | goto error; | |
425 | } | |
426 | DBG("Listening on sock %d for live", sock->fd); | |
427 | ||
428 | ret = sock->ops->bind(sock); | |
429 | if (ret < 0) { | |
430 | goto error; | |
431 | } | |
432 | ||
433 | ret = sock->ops->listen(sock, -1); | |
434 | if (ret < 0) { | |
435 | goto error; | |
436 | ||
437 | } | |
438 | ||
439 | return sock; | |
440 | ||
441 | error: | |
442 | if (sock) { | |
443 | lttcomm_destroy_sock(sock); | |
444 | } | |
445 | return NULL; | |
446 | } | |
447 | ||
448 | /* | |
449 | * This thread manages the listening for new connections on the network | |
450 | */ | |
451 | static | |
452 | void *thread_listener(void *data) | |
453 | { | |
454 | int i, ret, pollfd, err = -1; | |
d3e2ba59 JD |
455 | uint32_t revents, nb_fd; |
456 | struct lttng_poll_event events; | |
457 | struct lttcomm_sock *live_control_sock; | |
458 | ||
459 | DBG("[thread] Relay live listener started"); | |
460 | ||
eea7556c MD |
461 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_LISTENER); |
462 | ||
463 | health_code_update(); | |
464 | ||
d3e2ba59 JD |
465 | live_control_sock = init_socket(live_uri); |
466 | if (!live_control_sock) { | |
467 | goto error_sock_control; | |
468 | } | |
469 | ||
fb4d42ab | 470 | /* Pass 2 as size here for the thread quit pipe and control sockets. */ |
d3e2ba59 JD |
471 | ret = create_thread_poll_set(&events, 2); |
472 | if (ret < 0) { | |
473 | goto error_create_poll; | |
474 | } | |
475 | ||
476 | /* Add the control socket */ | |
477 | ret = lttng_poll_add(&events, live_control_sock->fd, LPOLLIN | LPOLLRDHUP); | |
478 | if (ret < 0) { | |
479 | goto error_poll_add; | |
480 | } | |
481 | ||
3fd27398 MD |
482 | lttng_relay_notify_ready(); |
483 | ||
9b5e0863 MD |
484 | if (testpoint(relayd_thread_live_listener)) { |
485 | goto error_testpoint; | |
486 | } | |
487 | ||
d3e2ba59 | 488 | while (1) { |
eea7556c MD |
489 | health_code_update(); |
490 | ||
d3e2ba59 JD |
491 | DBG("Listener accepting live viewers connections"); |
492 | ||
493 | restart: | |
eea7556c | 494 | health_poll_entry(); |
d3e2ba59 | 495 | ret = lttng_poll_wait(&events, -1); |
eea7556c | 496 | health_poll_exit(); |
d3e2ba59 JD |
497 | if (ret < 0) { |
498 | /* | |
499 | * Restart interrupted system call. | |
500 | */ | |
501 | if (errno == EINTR) { | |
502 | goto restart; | |
503 | } | |
504 | goto error; | |
505 | } | |
506 | nb_fd = ret; | |
507 | ||
508 | DBG("Relay new viewer connection received"); | |
509 | for (i = 0; i < nb_fd; i++) { | |
eea7556c MD |
510 | health_code_update(); |
511 | ||
d3e2ba59 JD |
512 | /* Fetch once the poll data */ |
513 | revents = LTTNG_POLL_GETEV(&events, i); | |
514 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
515 | ||
516 | /* Thread quit pipe has been closed. Killing thread. */ | |
2a174661 | 517 | ret = check_live_conn_pipe(pollfd, revents); |
d3e2ba59 JD |
518 | if (ret) { |
519 | err = 0; | |
520 | goto exit; | |
521 | } | |
522 | ||
523 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
524 | ERR("socket poll error"); | |
525 | goto error; | |
526 | } else if (revents & LPOLLIN) { | |
527 | /* | |
528 | * Get allocated in this thread, enqueued to a global queue, | |
529 | * dequeued and freed in the worker thread. | |
530 | */ | |
58eb9381 DG |
531 | int val = 1; |
532 | struct relay_connection *new_conn; | |
d3e2ba59 JD |
533 | struct lttcomm_sock *newsock; |
534 | ||
58eb9381 DG |
535 | new_conn = connection_create(); |
536 | if (!new_conn) { | |
d3e2ba59 JD |
537 | goto error; |
538 | } | |
539 | ||
d3e2ba59 JD |
540 | newsock = live_control_sock->ops->accept(live_control_sock); |
541 | if (!newsock) { | |
542 | PERROR("accepting control sock"); | |
58eb9381 | 543 | connection_free(new_conn); |
d3e2ba59 JD |
544 | goto error; |
545 | } | |
546 | DBG("Relay viewer connection accepted socket %d", newsock->fd); | |
58eb9381 | 547 | |
d3e2ba59 | 548 | ret = setsockopt(newsock->fd, SOL_SOCKET, SO_REUSEADDR, &val, |
58eb9381 | 549 | sizeof(val)); |
d3e2ba59 JD |
550 | if (ret < 0) { |
551 | PERROR("setsockopt inet"); | |
552 | lttcomm_destroy_sock(newsock); | |
58eb9381 | 553 | connection_free(new_conn); |
d3e2ba59 JD |
554 | goto error; |
555 | } | |
58eb9381 | 556 | new_conn->sock = newsock; |
d3e2ba59 | 557 | |
58eb9381 DG |
558 | /* Enqueue request for the dispatcher thread. */ |
559 | cds_wfq_enqueue(&viewer_conn_queue.queue, &new_conn->qnode); | |
d3e2ba59 JD |
560 | |
561 | /* | |
58eb9381 DG |
562 | * Wake the dispatch queue futex. Implicit memory barrier with |
563 | * the exchange in cds_wfq_enqueue. | |
d3e2ba59 | 564 | */ |
58eb9381 | 565 | futex_nto1_wake(&viewer_conn_queue.futex); |
d3e2ba59 JD |
566 | } |
567 | } | |
568 | } | |
569 | ||
570 | exit: | |
571 | error: | |
572 | error_poll_add: | |
9b5e0863 | 573 | error_testpoint: |
d3e2ba59 JD |
574 | lttng_poll_clean(&events); |
575 | error_create_poll: | |
576 | if (live_control_sock->fd >= 0) { | |
577 | ret = live_control_sock->ops->close(live_control_sock); | |
578 | if (ret) { | |
579 | PERROR("close"); | |
580 | } | |
581 | } | |
582 | lttcomm_destroy_sock(live_control_sock); | |
583 | error_sock_control: | |
584 | if (err) { | |
eea7556c | 585 | health_error(); |
d3e2ba59 JD |
586 | DBG("Live viewer listener thread exited with error"); |
587 | } | |
eea7556c | 588 | health_unregister(health_relayd); |
d3e2ba59 JD |
589 | DBG("Live viewer listener thread cleanup complete"); |
590 | stop_threads(); | |
591 | return NULL; | |
592 | } | |
593 | ||
594 | /* | |
595 | * This thread manages the dispatching of the requests to worker threads | |
596 | */ | |
597 | static | |
598 | void *thread_dispatcher(void *data) | |
599 | { | |
6cd525e8 MD |
600 | int err = -1; |
601 | ssize_t ret; | |
d3e2ba59 | 602 | struct cds_wfq_node *node; |
58eb9381 | 603 | struct relay_connection *conn = NULL; |
d3e2ba59 JD |
604 | |
605 | DBG("[thread] Live viewer relay dispatcher started"); | |
606 | ||
eea7556c MD |
607 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_DISPATCHER); |
608 | ||
9b5e0863 MD |
609 | if (testpoint(relayd_thread_live_dispatcher)) { |
610 | goto error_testpoint; | |
611 | } | |
612 | ||
eea7556c MD |
613 | health_code_update(); |
614 | ||
d3e2ba59 | 615 | while (!CMM_LOAD_SHARED(live_dispatch_thread_exit)) { |
eea7556c MD |
616 | health_code_update(); |
617 | ||
d3e2ba59 | 618 | /* Atomically prepare the queue futex */ |
58eb9381 | 619 | futex_nto1_prepare(&viewer_conn_queue.futex); |
d3e2ba59 JD |
620 | |
621 | do { | |
eea7556c MD |
622 | health_code_update(); |
623 | ||
d3e2ba59 | 624 | /* Dequeue commands */ |
58eb9381 | 625 | node = cds_wfq_dequeue_blocking(&viewer_conn_queue.queue); |
d3e2ba59 JD |
626 | if (node == NULL) { |
627 | DBG("Woken up but nothing in the live-viewer " | |
628 | "relay command queue"); | |
629 | /* Continue thread execution */ | |
630 | break; | |
631 | } | |
58eb9381 | 632 | conn = caa_container_of(node, struct relay_connection, qnode); |
d3e2ba59 | 633 | DBG("Dispatching viewer request waiting on sock %d", |
58eb9381 | 634 | conn->sock->fd); |
d3e2ba59 JD |
635 | |
636 | /* | |
637 | * Inform worker thread of the new request. This call is blocking | |
638 | * so we can be assured that the data will be read at some point in | |
639 | * time or wait to the end of the world :) | |
640 | */ | |
58eb9381 DG |
641 | ret = lttng_write(live_conn_pipe[1], &conn, sizeof(conn)); |
642 | if (ret < 0) { | |
643 | PERROR("write conn pipe"); | |
644 | connection_destroy(conn); | |
d3e2ba59 JD |
645 | goto error; |
646 | } | |
647 | } while (node != NULL); | |
648 | ||
649 | /* Futex wait on queue. Blocking call on futex() */ | |
eea7556c | 650 | health_poll_entry(); |
58eb9381 | 651 | futex_nto1_wait(&viewer_conn_queue.futex); |
eea7556c | 652 | health_poll_exit(); |
d3e2ba59 JD |
653 | } |
654 | ||
eea7556c MD |
655 | /* Normal exit, no error */ |
656 | err = 0; | |
657 | ||
d3e2ba59 | 658 | error: |
9b5e0863 | 659 | error_testpoint: |
eea7556c MD |
660 | if (err) { |
661 | health_error(); | |
662 | ERR("Health error occurred in %s", __func__); | |
663 | } | |
664 | health_unregister(health_relayd); | |
d3e2ba59 JD |
665 | DBG("Live viewer dispatch thread dying"); |
666 | stop_threads(); | |
667 | return NULL; | |
668 | } | |
669 | ||
670 | /* | |
671 | * Establish connection with the viewer and check the versions. | |
672 | * | |
673 | * Return 0 on success or else negative value. | |
674 | */ | |
675 | static | |
58eb9381 | 676 | int viewer_connect(struct relay_connection *conn) |
d3e2ba59 JD |
677 | { |
678 | int ret; | |
679 | struct lttng_viewer_connect reply, msg; | |
680 | ||
58eb9381 | 681 | assert(conn); |
d3e2ba59 | 682 | |
58eb9381 | 683 | conn->version_check_done = 1; |
d3e2ba59 | 684 | |
eea7556c MD |
685 | health_code_update(); |
686 | ||
2f8f53af DG |
687 | DBG("Viewer is establishing a connection to the relayd."); |
688 | ||
58eb9381 | 689 | ret = recv_request(conn->sock, &msg, sizeof(msg)); |
2f8f53af | 690 | if (ret < 0) { |
d3e2ba59 JD |
691 | goto end; |
692 | } | |
693 | ||
eea7556c MD |
694 | health_code_update(); |
695 | ||
d3e2ba59 JD |
696 | reply.major = RELAYD_VERSION_COMM_MAJOR; |
697 | reply.minor = RELAYD_VERSION_COMM_MINOR; | |
698 | ||
699 | /* Major versions must be the same */ | |
700 | if (reply.major != be32toh(msg.major)) { | |
2f8f53af DG |
701 | DBG("Incompatible major versions ([relayd] %u vs [client] %u)", |
702 | reply.major, be32toh(msg.major)); | |
72180669 | 703 | ret = -1; |
d3e2ba59 JD |
704 | goto end; |
705 | } | |
706 | ||
58eb9381 | 707 | conn->major = reply.major; |
d3e2ba59 JD |
708 | /* We adapt to the lowest compatible version */ |
709 | if (reply.minor <= be32toh(msg.minor)) { | |
58eb9381 | 710 | conn->minor = reply.minor; |
d3e2ba59 | 711 | } else { |
58eb9381 | 712 | conn->minor = be32toh(msg.minor); |
d3e2ba59 JD |
713 | } |
714 | ||
c4e361a4 | 715 | if (be32toh(msg.type) == LTTNG_VIEWER_CLIENT_COMMAND) { |
58eb9381 | 716 | conn->type = RELAY_VIEWER_COMMAND; |
c4e361a4 | 717 | } else if (be32toh(msg.type) == LTTNG_VIEWER_CLIENT_NOTIFICATION) { |
58eb9381 | 718 | conn->type = RELAY_VIEWER_NOTIFICATION; |
d3e2ba59 JD |
719 | } else { |
720 | ERR("Unknown connection type : %u", be32toh(msg.type)); | |
721 | ret = -1; | |
722 | goto end; | |
723 | } | |
724 | ||
725 | reply.major = htobe32(reply.major); | |
726 | reply.minor = htobe32(reply.minor); | |
58eb9381 | 727 | if (conn->type == RELAY_VIEWER_COMMAND) { |
d3e2ba59 JD |
728 | reply.viewer_session_id = htobe64(++last_relay_viewer_session_id); |
729 | } | |
eea7556c MD |
730 | |
731 | health_code_update(); | |
732 | ||
58eb9381 | 733 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 734 | if (ret < 0) { |
2f8f53af | 735 | goto end; |
d3e2ba59 JD |
736 | } |
737 | ||
eea7556c MD |
738 | health_code_update(); |
739 | ||
58eb9381 | 740 | DBG("Version check done using protocol %u.%u", conn->major, conn->minor); |
d3e2ba59 JD |
741 | ret = 0; |
742 | ||
743 | end: | |
744 | return ret; | |
745 | } | |
746 | ||
747 | /* | |
748 | * Send the viewer the list of current sessions. | |
749 | * | |
750 | * Return 0 on success or else a negative value. | |
751 | */ | |
752 | static | |
58eb9381 | 753 | int viewer_list_sessions(struct relay_connection *conn) |
d3e2ba59 JD |
754 | { |
755 | int ret; | |
756 | struct lttng_viewer_list_sessions session_list; | |
757 | unsigned long count; | |
758 | long approx_before, approx_after; | |
d3e2ba59 JD |
759 | struct lttng_ht_iter iter; |
760 | struct lttng_viewer_session send_session; | |
761 | struct relay_session *session; | |
762 | ||
763 | DBG("List sessions received"); | |
764 | ||
d3e2ba59 | 765 | rcu_read_lock(); |
58eb9381 DG |
766 | cds_lfht_count_nodes(conn->sessions_ht->ht, &approx_before, &count, |
767 | &approx_after); | |
d3e2ba59 JD |
768 | session_list.sessions_count = htobe32(count); |
769 | ||
eea7556c MD |
770 | health_code_update(); |
771 | ||
58eb9381 | 772 | ret = send_response(conn->sock, &session_list, sizeof(session_list)); |
d3e2ba59 | 773 | if (ret < 0) { |
d3e2ba59 JD |
774 | goto end_unlock; |
775 | } | |
776 | ||
eea7556c MD |
777 | health_code_update(); |
778 | ||
58eb9381 | 779 | cds_lfht_for_each_entry(conn->sessions_ht->ht, &iter.iter, session, |
2f8f53af | 780 | session_n.node) { |
eea7556c MD |
781 | health_code_update(); |
782 | ||
d3e2ba59 JD |
783 | strncpy(send_session.session_name, session->session_name, |
784 | sizeof(send_session.session_name)); | |
785 | strncpy(send_session.hostname, session->hostname, | |
786 | sizeof(send_session.hostname)); | |
787 | send_session.id = htobe64(session->id); | |
788 | send_session.live_timer = htobe32(session->live_timer); | |
2a174661 | 789 | send_session.clients = htobe32(session->viewer_refcount); |
87b576ec | 790 | send_session.streams = htobe32(session->stream_count); |
d3e2ba59 | 791 | |
eea7556c MD |
792 | health_code_update(); |
793 | ||
58eb9381 | 794 | ret = send_response(conn->sock, &send_session, sizeof(send_session)); |
d3e2ba59 | 795 | if (ret < 0) { |
d3e2ba59 JD |
796 | goto end_unlock; |
797 | } | |
798 | } | |
eea7556c MD |
799 | health_code_update(); |
800 | ||
d3e2ba59 JD |
801 | rcu_read_unlock(); |
802 | ret = 0; | |
803 | goto end; | |
804 | ||
805 | end_unlock: | |
806 | rcu_read_unlock(); | |
807 | ||
808 | end: | |
d3e2ba59 JD |
809 | return ret; |
810 | } | |
811 | ||
6763619c JD |
812 | /* |
813 | * Check if a connection is attached to a session. | |
814 | * Return 1 if attached, 0 if not attached, a negative value on error. | |
815 | */ | |
816 | static | |
817 | int session_attached(struct relay_connection *conn, uint64_t session_id) | |
818 | { | |
819 | struct relay_session *session; | |
820 | int found = 0; | |
821 | ||
822 | if (!conn->viewer_session) { | |
823 | goto end; | |
824 | } | |
825 | cds_list_for_each_entry(session, | |
826 | &conn->viewer_session->sessions_head, | |
827 | viewer_session_list) { | |
828 | if (session->id == session_id) { | |
829 | found = 1; | |
830 | goto end; | |
831 | } | |
832 | } | |
833 | ||
834 | end: | |
835 | return found; | |
836 | } | |
837 | ||
80e8027a JD |
838 | /* |
839 | * Send the viewer the list of current sessions. | |
840 | */ | |
841 | static | |
58eb9381 | 842 | int viewer_get_new_streams(struct relay_connection *conn) |
80e8027a JD |
843 | { |
844 | int ret, send_streams = 0; | |
2f8f53af | 845 | uint32_t nb_created = 0, nb_unsent = 0, nb_streams = 0; |
80e8027a JD |
846 | struct lttng_viewer_new_streams_request request; |
847 | struct lttng_viewer_new_streams_response response; | |
80e8027a | 848 | struct relay_session *session; |
6763619c | 849 | uint64_t session_id; |
80e8027a | 850 | |
58eb9381 | 851 | assert(conn); |
80e8027a JD |
852 | |
853 | DBG("Get new streams received"); | |
854 | ||
80e8027a JD |
855 | health_code_update(); |
856 | ||
2f8f53af | 857 | /* Receive the request from the connected client. */ |
58eb9381 | 858 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 859 | if (ret < 0) { |
80e8027a JD |
860 | goto error; |
861 | } | |
6763619c | 862 | session_id = be64toh(request.session_id); |
80e8027a JD |
863 | |
864 | health_code_update(); | |
865 | ||
866 | rcu_read_lock(); | |
6763619c | 867 | session = session_find_by_id(conn->sessions_ht, session_id); |
2f8f53af | 868 | if (!session) { |
6763619c | 869 | DBG("Relay session %" PRIu64 " not found", session_id); |
c4e361a4 | 870 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_ERR); |
80e8027a JD |
871 | goto send_reply; |
872 | } | |
873 | ||
6763619c | 874 | if (!session_attached(conn, session_id)) { |
80e8027a | 875 | send_streams = 0; |
c4e361a4 | 876 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_ERR); |
80e8027a JD |
877 | goto send_reply; |
878 | } | |
879 | ||
6763619c JD |
880 | send_streams = 1; |
881 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_OK); | |
882 | ||
2f8f53af DG |
883 | if (!send_streams) { |
884 | goto send_reply; | |
80e8027a | 885 | } |
80e8027a | 886 | |
c4e361a4 | 887 | ret = make_viewer_streams(session, LTTNG_VIEWER_SEEK_LAST, NULL, &nb_unsent, |
2f8f53af DG |
888 | &nb_created); |
889 | if (ret < 0) { | |
890 | goto end_unlock; | |
891 | } | |
892 | /* Only send back the newly created streams with the unsent ones. */ | |
893 | nb_streams = nb_created + nb_unsent; | |
80e8027a JD |
894 | response.streams_count = htobe32(nb_streams); |
895 | ||
4479f682 JD |
896 | /* |
897 | * If the session is closed and we have no new streams to send, | |
898 | * it means that the viewer has already received the whole trace | |
899 | * for this session and should now close it. | |
900 | */ | |
901 | if (nb_streams == 0 && session->close_flag) { | |
902 | send_streams = 0; | |
903 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_HUP); | |
6763619c JD |
904 | /* |
905 | * Remove the session from the attached list of the connection | |
906 | * and try to destroy it. | |
907 | */ | |
908 | cds_list_del(&session->viewer_session_list); | |
909 | session_viewer_try_destroy(conn->sessions_ht, session); | |
4479f682 JD |
910 | goto send_reply; |
911 | } | |
912 | ||
80e8027a JD |
913 | send_reply: |
914 | health_code_update(); | |
58eb9381 | 915 | ret = send_response(conn->sock, &response, sizeof(response)); |
80e8027a | 916 | if (ret < 0) { |
80e8027a JD |
917 | goto end_unlock; |
918 | } | |
919 | health_code_update(); | |
920 | ||
921 | /* | |
922 | * Unknown or empty session, just return gracefully, the viewer knows what | |
923 | * is happening. | |
924 | */ | |
925 | if (!send_streams || !nb_streams) { | |
926 | ret = 0; | |
927 | goto end_unlock; | |
928 | } | |
929 | ||
2f8f53af DG |
930 | /* |
931 | * Send stream and *DON'T* ignore the sent flag so every viewer streams | |
932 | * that were not sent from that point will be sent to the viewer. | |
933 | */ | |
58eb9381 | 934 | ret = send_viewer_streams(conn->sock, session, 0); |
2f8f53af DG |
935 | if (ret < 0) { |
936 | goto end_unlock; | |
80e8027a JD |
937 | } |
938 | ||
80e8027a JD |
939 | end_unlock: |
940 | rcu_read_unlock(); | |
80e8027a JD |
941 | error: |
942 | return ret; | |
943 | } | |
944 | ||
d3e2ba59 JD |
945 | /* |
946 | * Send the viewer the list of current sessions. | |
947 | */ | |
948 | static | |
58eb9381 | 949 | int viewer_attach_session(struct relay_connection *conn) |
d3e2ba59 | 950 | { |
2f8f53af DG |
951 | int send_streams = 0; |
952 | ssize_t ret; | |
80e8027a | 953 | uint32_t nb_streams = 0; |
2f8f53af | 954 | enum lttng_viewer_seek seek_type; |
d3e2ba59 JD |
955 | struct lttng_viewer_attach_session_request request; |
956 | struct lttng_viewer_attach_session_response response; | |
d3e2ba59 JD |
957 | struct relay_session *session; |
958 | ||
58eb9381 | 959 | assert(conn); |
d3e2ba59 | 960 | |
eea7556c MD |
961 | health_code_update(); |
962 | ||
2f8f53af | 963 | /* Receive the request from the connected client. */ |
58eb9381 | 964 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 965 | if (ret < 0) { |
d3e2ba59 JD |
966 | goto error; |
967 | } | |
968 | ||
eea7556c MD |
969 | health_code_update(); |
970 | ||
c3b7390b JD |
971 | if (!conn->viewer_session) { |
972 | DBG("Client trying to attach before creating a live viewer session"); | |
973 | response.status = htobe32(LTTNG_VIEWER_ATTACH_NO_SESSION); | |
974 | goto send_reply; | |
975 | } | |
976 | ||
d3e2ba59 | 977 | rcu_read_lock(); |
58eb9381 DG |
978 | session = session_find_by_id(conn->sessions_ht, |
979 | be64toh(request.session_id)); | |
2f8f53af | 980 | if (!session) { |
d3e2ba59 JD |
981 | DBG("Relay session %" PRIu64 " not found", |
982 | be64toh(request.session_id)); | |
c4e361a4 | 983 | response.status = htobe32(LTTNG_VIEWER_ATTACH_UNK); |
d3e2ba59 JD |
984 | goto send_reply; |
985 | } | |
2a174661 DG |
986 | session_viewer_attach(session); |
987 | DBG("Attach session ID %" PRIu64 " received", be64toh(request.session_id)); | |
d3e2ba59 | 988 | |
2a174661 | 989 | if (uatomic_read(&session->viewer_refcount) > 1) { |
d3e2ba59 | 990 | DBG("Already a viewer attached"); |
c4e361a4 | 991 | response.status = htobe32(LTTNG_VIEWER_ATTACH_ALREADY); |
2a174661 | 992 | session_viewer_detach(session); |
d3e2ba59 JD |
993 | goto send_reply; |
994 | } else if (session->live_timer == 0) { | |
995 | DBG("Not live session"); | |
c4e361a4 | 996 | response.status = htobe32(LTTNG_VIEWER_ATTACH_NOT_LIVE); |
d3e2ba59 JD |
997 | goto send_reply; |
998 | } else { | |
d3e2ba59 | 999 | send_streams = 1; |
c4e361a4 | 1000 | response.status = htobe32(LTTNG_VIEWER_ATTACH_OK); |
6763619c JD |
1001 | cds_list_add(&session->viewer_session_list, |
1002 | &conn->viewer_session->sessions_head); | |
d3e2ba59 JD |
1003 | } |
1004 | ||
1005 | switch (be32toh(request.seek)) { | |
c4e361a4 JD |
1006 | case LTTNG_VIEWER_SEEK_BEGINNING: |
1007 | case LTTNG_VIEWER_SEEK_LAST: | |
2f8f53af | 1008 | seek_type = be32toh(request.seek); |
d3e2ba59 JD |
1009 | break; |
1010 | default: | |
1011 | ERR("Wrong seek parameter"); | |
c4e361a4 | 1012 | response.status = htobe32(LTTNG_VIEWER_ATTACH_SEEK_ERR); |
d3e2ba59 JD |
1013 | send_streams = 0; |
1014 | goto send_reply; | |
1015 | } | |
1016 | ||
2f8f53af DG |
1017 | if (!send_streams) { |
1018 | goto send_reply; | |
1019 | } | |
a4baae1b | 1020 | |
2f8f53af DG |
1021 | ret = make_viewer_streams(session, seek_type, &nb_streams, NULL, NULL); |
1022 | if (ret < 0) { | |
1023 | goto end_unlock; | |
d3e2ba59 | 1024 | } |
2f8f53af | 1025 | response.streams_count = htobe32(nb_streams); |
d3e2ba59 JD |
1026 | |
1027 | send_reply: | |
eea7556c | 1028 | health_code_update(); |
58eb9381 | 1029 | ret = send_response(conn->sock, &response, sizeof(response)); |
d3e2ba59 | 1030 | if (ret < 0) { |
d3e2ba59 JD |
1031 | goto end_unlock; |
1032 | } | |
eea7556c | 1033 | health_code_update(); |
d3e2ba59 JD |
1034 | |
1035 | /* | |
157df586 | 1036 | * Unknown or empty session, just return gracefully, the viewer knows what |
d3e2ba59 JD |
1037 | * is happening. |
1038 | */ | |
157df586 | 1039 | if (!send_streams || !nb_streams) { |
d3e2ba59 JD |
1040 | ret = 0; |
1041 | goto end_unlock; | |
1042 | } | |
1043 | ||
2f8f53af | 1044 | /* Send stream and ignore the sent flag. */ |
58eb9381 | 1045 | ret = send_viewer_streams(conn->sock, session, 1); |
2f8f53af DG |
1046 | if (ret < 0) { |
1047 | goto end_unlock; | |
d3e2ba59 | 1048 | } |
d3e2ba59 JD |
1049 | |
1050 | end_unlock: | |
1051 | rcu_read_unlock(); | |
4a9daf17 JD |
1052 | error: |
1053 | return ret; | |
1054 | } | |
1055 | ||
d3e2ba59 JD |
1056 | /* |
1057 | * Send the next index for a stream. | |
1058 | * | |
1059 | * Return 0 on success or else a negative value. | |
1060 | */ | |
1061 | static | |
58eb9381 | 1062 | int viewer_get_next_index(struct relay_connection *conn) |
d3e2ba59 JD |
1063 | { |
1064 | int ret; | |
1065 | struct lttng_viewer_get_next_index request_index; | |
1066 | struct lttng_viewer_index viewer_index; | |
50adc264 | 1067 | struct ctf_packet_index packet_index; |
d3e2ba59 JD |
1068 | struct relay_viewer_stream *vstream; |
1069 | struct relay_stream *rstream; | |
2a174661 DG |
1070 | struct ctf_trace *ctf_trace; |
1071 | struct relay_session *session; | |
d3e2ba59 | 1072 | |
58eb9381 | 1073 | assert(conn); |
d3e2ba59 JD |
1074 | |
1075 | DBG("Viewer get next index"); | |
1076 | ||
eea7556c | 1077 | health_code_update(); |
2f8f53af | 1078 | |
58eb9381 | 1079 | ret = recv_request(conn->sock, &request_index, sizeof(request_index)); |
2f8f53af | 1080 | if (ret < 0) { |
d3e2ba59 JD |
1081 | goto end; |
1082 | } | |
eea7556c | 1083 | health_code_update(); |
d3e2ba59 JD |
1084 | |
1085 | rcu_read_lock(); | |
6763619c JD |
1086 | vstream = viewer_stream_find_by_id(be64toh(request_index.stream_id)); |
1087 | if (!vstream) { | |
2a174661 DG |
1088 | ret = -1; |
1089 | goto end_unlock; | |
1090 | } | |
1091 | ||
6763619c JD |
1092 | session = session_find_by_id(conn->sessions_ht, vstream->session_id); |
1093 | if (!session) { | |
d3e2ba59 JD |
1094 | ret = -1; |
1095 | goto end_unlock; | |
1096 | } | |
1097 | ||
2a174661 DG |
1098 | ctf_trace = ctf_trace_find_by_path(session->ctf_traces_ht, vstream->path_name); |
1099 | assert(ctf_trace); | |
1100 | ||
d3e2ba59 JD |
1101 | memset(&viewer_index, 0, sizeof(viewer_index)); |
1102 | ||
1103 | /* | |
1104 | * The viewer should not ask for index on metadata stream. | |
1105 | */ | |
1106 | if (vstream->metadata_flag) { | |
c4e361a4 | 1107 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_HUP); |
d3e2ba59 JD |
1108 | goto send_reply; |
1109 | } | |
1110 | ||
1111 | /* First time, we open the index file */ | |
1112 | if (vstream->index_read_fd < 0) { | |
2f8f53af DG |
1113 | ret = index_open(vstream->path_name, vstream->channel_name, |
1114 | vstream->tracefile_count, vstream->tracefile_count_current); | |
0e6830aa | 1115 | if (ret == -ENOENT) { |
d3e2ba59 JD |
1116 | /* |
1117 | * The index is created only when the first data packet arrives, it | |
1118 | * might not be ready at the beginning of the session | |
1119 | */ | |
c4e361a4 | 1120 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_RETRY); |
d3e2ba59 JD |
1121 | goto send_reply; |
1122 | } else if (ret < 0) { | |
c4e361a4 | 1123 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
d3e2ba59 JD |
1124 | goto send_reply; |
1125 | } | |
2f8f53af | 1126 | vstream->index_read_fd = ret; |
d3e2ba59 JD |
1127 | } |
1128 | ||
2a174661 DG |
1129 | rstream = stream_find_by_id(relay_streams_ht, vstream->stream_handle); |
1130 | assert(rstream); | |
1131 | ||
1132 | if (!rstream->close_flag) { | |
6b6b9a5a JD |
1133 | if (vstream->abort_flag) { |
1134 | /* Rotate on abort (overwrite). */ | |
1135 | DBG("Viewer rotate because of overwrite"); | |
2f8f53af | 1136 | ret = viewer_stream_rotate(vstream, rstream); |
6b6b9a5a JD |
1137 | if (ret < 0) { |
1138 | goto end_unlock; | |
a020f610 | 1139 | } else if (ret == 1) { |
c4e361a4 | 1140 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_HUP); |
2f8f53af | 1141 | viewer_stream_delete(vstream); |
2a174661 | 1142 | viewer_stream_destroy(ctf_trace, vstream); |
a020f610 | 1143 | goto send_reply; |
6b6b9a5a | 1144 | } |
2a174661 | 1145 | /* ret == 0 means successful so we continue. */ |
6b6b9a5a | 1146 | } |
2a174661 | 1147 | |
6b6b9a5a | 1148 | pthread_mutex_lock(&rstream->viewer_stream_rotation_lock); |
cef0f7d5 JD |
1149 | if (rstream->tracefile_count_current == vstream->tracefile_count_current) { |
1150 | if (rstream->beacon_ts_end != -1ULL && | |
1151 | vstream->last_sent_index == rstream->total_index_received) { | |
c4e361a4 | 1152 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_INACTIVE); |
cef0f7d5 JD |
1153 | viewer_index.timestamp_end = htobe64(rstream->beacon_ts_end); |
1154 | pthread_mutex_unlock(&rstream->viewer_stream_rotation_lock); | |
1155 | goto send_reply; | |
cef0f7d5 JD |
1156 | } else if (rstream->total_index_received <= vstream->last_sent_index |
1157 | && !vstream->close_write_flag) { | |
2a174661 DG |
1158 | /* |
1159 | * Reader and writer are working in the same tracefile, so we care | |
1160 | * about the number of index received and sent. Otherwise, we read | |
1161 | * up to EOF. | |
1162 | */ | |
cef0f7d5 JD |
1163 | pthread_mutex_unlock(&rstream->viewer_stream_rotation_lock); |
1164 | /* No new index to send, retry later. */ | |
c4e361a4 | 1165 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_RETRY); |
cef0f7d5 JD |
1166 | goto send_reply; |
1167 | } | |
d3e2ba59 | 1168 | } |
6b6b9a5a | 1169 | pthread_mutex_unlock(&rstream->viewer_stream_rotation_lock); |
2a174661 | 1170 | } else if (rstream->close_flag && vstream->close_write_flag && |
d3e2ba59 | 1171 | vstream->total_index_received == vstream->last_sent_index) { |
6b6b9a5a | 1172 | /* Last index sent and current tracefile closed in write */ |
c4e361a4 | 1173 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_HUP); |
2f8f53af | 1174 | viewer_stream_delete(vstream); |
2a174661 | 1175 | viewer_stream_destroy(ctf_trace, vstream); |
d3e2ba59 | 1176 | goto send_reply; |
6b6b9a5a JD |
1177 | } else { |
1178 | vstream->close_write_flag = 1; | |
d3e2ba59 JD |
1179 | } |
1180 | ||
2a174661 DG |
1181 | if (!ctf_trace->metadata_received || |
1182 | ctf_trace->metadata_received > ctf_trace->metadata_sent) { | |
d3e2ba59 JD |
1183 | viewer_index.flags |= LTTNG_VIEWER_FLAG_NEW_METADATA; |
1184 | } | |
1185 | ||
58eb9381 | 1186 | ret = check_new_streams(vstream->session_id, conn->sessions_ht); |
4a9daf17 JD |
1187 | if (ret < 0) { |
1188 | goto end_unlock; | |
1189 | } else if (ret == 1) { | |
1190 | viewer_index.flags |= LTTNG_VIEWER_FLAG_NEW_STREAM; | |
1191 | } | |
1192 | ||
cef0f7d5 JD |
1193 | pthread_mutex_lock(&vstream->overwrite_lock); |
1194 | if (vstream->abort_flag) { | |
1195 | /* | |
2a174661 | 1196 | * The file is being overwritten by the writer, we cannot * use it. |
cef0f7d5 | 1197 | */ |
c4e361a4 | 1198 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_RETRY); |
cef0f7d5 | 1199 | pthread_mutex_unlock(&vstream->overwrite_lock); |
2f8f53af | 1200 | ret = viewer_stream_rotate(vstream, rstream); |
cef0f7d5 JD |
1201 | if (ret < 0) { |
1202 | goto end_unlock; | |
a020f610 | 1203 | } else if (ret == 1) { |
c4e361a4 | 1204 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_HUP); |
2f8f53af | 1205 | viewer_stream_delete(vstream); |
2a174661 | 1206 | viewer_stream_destroy(ctf_trace, vstream); |
a020f610 | 1207 | goto send_reply; |
cef0f7d5 JD |
1208 | } |
1209 | goto send_reply; | |
1210 | } | |
2f8f53af | 1211 | |
6cd525e8 MD |
1212 | ret = lttng_read(vstream->index_read_fd, &packet_index, |
1213 | sizeof(packet_index)); | |
cef0f7d5 | 1214 | pthread_mutex_unlock(&vstream->overwrite_lock); |
d3e2ba59 | 1215 | if (ret < sizeof(packet_index)) { |
6b6b9a5a JD |
1216 | /* |
1217 | * The tracefile is closed in write, so we read up to EOF. | |
1218 | */ | |
1219 | if (vstream->close_write_flag == 1) { | |
c4e361a4 | 1220 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_RETRY); |
6b6b9a5a | 1221 | /* Rotate on normal EOF */ |
2f8f53af | 1222 | ret = viewer_stream_rotate(vstream, rstream); |
6b6b9a5a JD |
1223 | if (ret < 0) { |
1224 | goto end_unlock; | |
a020f610 | 1225 | } else if (ret == 1) { |
c4e361a4 | 1226 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_HUP); |
2f8f53af | 1227 | viewer_stream_delete(vstream); |
2a174661 | 1228 | viewer_stream_destroy(ctf_trace, vstream); |
a020f610 | 1229 | goto send_reply; |
6b6b9a5a JD |
1230 | } |
1231 | } else { | |
2f8f53af | 1232 | PERROR("Relay reading index file %d", vstream->index_read_fd); |
c4e361a4 | 1233 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
6b6b9a5a JD |
1234 | } |
1235 | goto send_reply; | |
d3e2ba59 | 1236 | } else { |
c4e361a4 | 1237 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_OK); |
d3e2ba59 JD |
1238 | vstream->last_sent_index++; |
1239 | } | |
1240 | ||
1241 | /* | |
1242 | * Indexes are stored in big endian, no need to switch before sending. | |
1243 | */ | |
1244 | viewer_index.offset = packet_index.offset; | |
1245 | viewer_index.packet_size = packet_index.packet_size; | |
1246 | viewer_index.content_size = packet_index.content_size; | |
1247 | viewer_index.timestamp_begin = packet_index.timestamp_begin; | |
1248 | viewer_index.timestamp_end = packet_index.timestamp_end; | |
1249 | viewer_index.events_discarded = packet_index.events_discarded; | |
1250 | viewer_index.stream_id = packet_index.stream_id; | |
1251 | ||
1252 | send_reply: | |
1253 | viewer_index.flags = htobe32(viewer_index.flags); | |
eea7556c | 1254 | health_code_update(); |
2f8f53af | 1255 | |
58eb9381 | 1256 | ret = send_response(conn->sock, &viewer_index, sizeof(viewer_index)); |
d3e2ba59 | 1257 | if (ret < 0) { |
d3e2ba59 JD |
1258 | goto end_unlock; |
1259 | } | |
eea7556c | 1260 | health_code_update(); |
d3e2ba59 | 1261 | |
2f8f53af | 1262 | DBG("Index %" PRIu64 " for stream %" PRIu64 " sent", |
d3e2ba59 JD |
1263 | vstream->last_sent_index, vstream->stream_handle); |
1264 | ||
1265 | end_unlock: | |
1266 | rcu_read_unlock(); | |
1267 | ||
d3e2ba59 JD |
1268 | end: |
1269 | return ret; | |
1270 | } | |
1271 | ||
1272 | /* | |
1273 | * Send the next index for a stream | |
1274 | * | |
1275 | * Return 0 on success or else a negative value. | |
1276 | */ | |
1277 | static | |
58eb9381 | 1278 | int viewer_get_packet(struct relay_connection *conn) |
d3e2ba59 JD |
1279 | { |
1280 | int ret, send_data = 0; | |
1281 | char *data = NULL; | |
1282 | uint32_t len = 0; | |
1283 | ssize_t read_len; | |
1284 | struct lttng_viewer_get_packet get_packet_info; | |
1285 | struct lttng_viewer_trace_packet reply; | |
1286 | struct relay_viewer_stream *stream; | |
6763619c | 1287 | struct relay_session *session; |
2a174661 | 1288 | struct ctf_trace *ctf_trace; |
d3e2ba59 | 1289 | |
58eb9381 | 1290 | assert(conn); |
d3e2ba59 JD |
1291 | |
1292 | DBG2("Relay get data packet"); | |
1293 | ||
eea7556c | 1294 | health_code_update(); |
2f8f53af | 1295 | |
58eb9381 | 1296 | ret = recv_request(conn->sock, &get_packet_info, sizeof(get_packet_info)); |
2f8f53af | 1297 | if (ret < 0) { |
d3e2ba59 JD |
1298 | goto end; |
1299 | } | |
eea7556c | 1300 | health_code_update(); |
d3e2ba59 | 1301 | |
0233a6a5 DG |
1302 | /* From this point on, the error label can be reached. */ |
1303 | memset(&reply, 0, sizeof(reply)); | |
1304 | ||
d3e2ba59 | 1305 | rcu_read_lock(); |
2f8f53af | 1306 | stream = viewer_stream_find_by_id(be64toh(get_packet_info.stream_id)); |
d3e2ba59 JD |
1307 | if (!stream) { |
1308 | goto error; | |
1309 | } | |
2a174661 | 1310 | |
6763619c JD |
1311 | session = session_find_by_id(conn->sessions_ht, stream->session_id); |
1312 | if (!session) { | |
1313 | ret = -1; | |
1314 | goto error; | |
1315 | } | |
1316 | ||
1317 | ctf_trace = ctf_trace_find_by_path(session->ctf_traces_ht, | |
2a174661 DG |
1318 | stream->path_name); |
1319 | assert(ctf_trace); | |
d3e2ba59 JD |
1320 | |
1321 | /* | |
1322 | * First time we read this stream, we need open the tracefile, we should | |
1323 | * only arrive here if an index has already been sent to the viewer, so the | |
1324 | * tracefile must exist, if it does not it is a fatal error. | |
1325 | */ | |
1326 | if (stream->read_fd < 0) { | |
1327 | char fullpath[PATH_MAX]; | |
1328 | ||
6b6b9a5a JD |
1329 | if (stream->tracefile_count > 0) { |
1330 | ret = snprintf(fullpath, PATH_MAX, "%s/%s_%" PRIu64, stream->path_name, | |
1331 | stream->channel_name, | |
1332 | stream->tracefile_count_current); | |
1333 | } else { | |
1334 | ret = snprintf(fullpath, PATH_MAX, "%s/%s", stream->path_name, | |
1335 | stream->channel_name); | |
1336 | } | |
d3e2ba59 JD |
1337 | if (ret < 0) { |
1338 | goto error; | |
1339 | } | |
1340 | ret = open(fullpath, O_RDONLY); | |
1341 | if (ret < 0) { | |
1342 | PERROR("Relay opening trace file"); | |
1343 | goto error; | |
1344 | } | |
1345 | stream->read_fd = ret; | |
1346 | } | |
1347 | ||
2a174661 DG |
1348 | if (!ctf_trace->metadata_received || |
1349 | ctf_trace->metadata_received > ctf_trace->metadata_sent) { | |
c4e361a4 | 1350 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); |
d3e2ba59 | 1351 | reply.flags |= LTTNG_VIEWER_FLAG_NEW_METADATA; |
d3e2ba59 JD |
1352 | goto send_reply; |
1353 | } | |
1354 | ||
58eb9381 | 1355 | ret = check_new_streams(stream->session_id, conn->sessions_ht); |
4a9daf17 JD |
1356 | if (ret < 0) { |
1357 | goto end_unlock; | |
1358 | } else if (ret == 1) { | |
c4e361a4 | 1359 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); |
4a9daf17 JD |
1360 | reply.flags |= LTTNG_VIEWER_FLAG_NEW_STREAM; |
1361 | goto send_reply; | |
1362 | } | |
1363 | ||
d3e2ba59 JD |
1364 | len = be32toh(get_packet_info.len); |
1365 | data = zmalloc(len); | |
1366 | if (!data) { | |
1367 | PERROR("relay data zmalloc"); | |
1368 | goto error; | |
1369 | } | |
1370 | ||
1371 | ret = lseek(stream->read_fd, be64toh(get_packet_info.offset), SEEK_SET); | |
1372 | if (ret < 0) { | |
6b6b9a5a JD |
1373 | /* |
1374 | * If the read fd was closed by the streaming side, the | |
1375 | * abort_flag will be set to 1, otherwise it is an error. | |
1376 | */ | |
1377 | if (stream->abort_flag == 0) { | |
1378 | PERROR("lseek"); | |
1379 | goto error; | |
1380 | } | |
c4e361a4 | 1381 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_EOF); |
6b6b9a5a | 1382 | goto send_reply; |
d3e2ba59 | 1383 | } |
6cd525e8 MD |
1384 | read_len = lttng_read(stream->read_fd, data, len); |
1385 | if (read_len < len) { | |
6b6b9a5a JD |
1386 | /* |
1387 | * If the read fd was closed by the streaming side, the | |
1388 | * abort_flag will be set to 1, otherwise it is an error. | |
1389 | */ | |
1390 | if (stream->abort_flag == 0) { | |
1391 | PERROR("Relay reading trace file, fd: %d, offset: %" PRIu64, | |
1392 | stream->read_fd, | |
1393 | be64toh(get_packet_info.offset)); | |
1394 | goto error; | |
1395 | } else { | |
c4e361a4 | 1396 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_EOF); |
6b6b9a5a JD |
1397 | goto send_reply; |
1398 | } | |
d3e2ba59 | 1399 | } |
c4e361a4 | 1400 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_OK); |
d3e2ba59 JD |
1401 | reply.len = htobe32(len); |
1402 | send_data = 1; | |
1403 | goto send_reply; | |
1404 | ||
1405 | error: | |
c4e361a4 | 1406 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); |
d3e2ba59 JD |
1407 | |
1408 | send_reply: | |
1409 | reply.flags = htobe32(reply.flags); | |
eea7556c MD |
1410 | |
1411 | health_code_update(); | |
2f8f53af | 1412 | |
58eb9381 | 1413 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 1414 | if (ret < 0) { |
d3e2ba59 JD |
1415 | goto end_unlock; |
1416 | } | |
eea7556c | 1417 | health_code_update(); |
d3e2ba59 JD |
1418 | |
1419 | if (send_data) { | |
eea7556c | 1420 | health_code_update(); |
58eb9381 | 1421 | ret = send_response(conn->sock, data, len); |
d3e2ba59 | 1422 | if (ret < 0) { |
d3e2ba59 JD |
1423 | goto end_unlock; |
1424 | } | |
eea7556c | 1425 | health_code_update(); |
d3e2ba59 JD |
1426 | } |
1427 | ||
1428 | DBG("Sent %u bytes for stream %" PRIu64, len, | |
1429 | be64toh(get_packet_info.stream_id)); | |
1430 | ||
1431 | end_unlock: | |
1432 | free(data); | |
1433 | rcu_read_unlock(); | |
1434 | ||
1435 | end: | |
1436 | return ret; | |
1437 | } | |
1438 | ||
1439 | /* | |
1440 | * Send the session's metadata | |
1441 | * | |
1442 | * Return 0 on success else a negative value. | |
1443 | */ | |
1444 | static | |
58eb9381 | 1445 | int viewer_get_metadata(struct relay_connection *conn) |
d3e2ba59 JD |
1446 | { |
1447 | int ret = 0; | |
1448 | ssize_t read_len; | |
1449 | uint64_t len = 0; | |
1450 | char *data = NULL; | |
1451 | struct lttng_viewer_get_metadata request; | |
1452 | struct lttng_viewer_metadata_packet reply; | |
1453 | struct relay_viewer_stream *stream; | |
2a174661 | 1454 | struct ctf_trace *ctf_trace; |
6763619c | 1455 | struct relay_session *session; |
d3e2ba59 | 1456 | |
58eb9381 | 1457 | assert(conn); |
d3e2ba59 JD |
1458 | |
1459 | DBG("Relay get metadata"); | |
1460 | ||
eea7556c | 1461 | health_code_update(); |
2f8f53af | 1462 | |
58eb9381 | 1463 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 1464 | if (ret < 0) { |
d3e2ba59 JD |
1465 | goto end; |
1466 | } | |
eea7556c | 1467 | health_code_update(); |
d3e2ba59 JD |
1468 | |
1469 | rcu_read_lock(); | |
2f8f53af | 1470 | stream = viewer_stream_find_by_id(be64toh(request.stream_id)); |
d3e2ba59 JD |
1471 | if (!stream || !stream->metadata_flag) { |
1472 | ERR("Invalid metadata stream"); | |
1473 | goto error; | |
1474 | } | |
d3e2ba59 | 1475 | |
6763619c JD |
1476 | session = session_find_by_id(conn->sessions_ht, stream->session_id); |
1477 | if (!session) { | |
1478 | ret = -1; | |
1479 | goto error; | |
1480 | } | |
1481 | ||
1482 | ctf_trace = ctf_trace_find_by_path(session->ctf_traces_ht, | |
2a174661 DG |
1483 | stream->path_name); |
1484 | assert(ctf_trace); | |
1485 | assert(ctf_trace->metadata_sent <= ctf_trace->metadata_received); | |
1486 | ||
1487 | len = ctf_trace->metadata_received - ctf_trace->metadata_sent; | |
d3e2ba59 | 1488 | if (len == 0) { |
c4e361a4 | 1489 | reply.status = htobe32(LTTNG_VIEWER_NO_NEW_METADATA); |
d3e2ba59 JD |
1490 | goto send_reply; |
1491 | } | |
1492 | ||
1493 | /* first time, we open the metadata file */ | |
1494 | if (stream->read_fd < 0) { | |
1495 | char fullpath[PATH_MAX]; | |
1496 | ||
1497 | ret = snprintf(fullpath, PATH_MAX, "%s/%s", stream->path_name, | |
1498 | stream->channel_name); | |
1499 | if (ret < 0) { | |
1500 | goto error; | |
1501 | } | |
1502 | ret = open(fullpath, O_RDONLY); | |
1503 | if (ret < 0) { | |
1504 | PERROR("Relay opening metadata file"); | |
1505 | goto error; | |
1506 | } | |
1507 | stream->read_fd = ret; | |
1508 | } | |
1509 | ||
1510 | reply.len = htobe64(len); | |
1511 | data = zmalloc(len); | |
1512 | if (!data) { | |
1513 | PERROR("viewer metadata zmalloc"); | |
1514 | goto error; | |
1515 | } | |
1516 | ||
6cd525e8 MD |
1517 | read_len = lttng_read(stream->read_fd, data, len); |
1518 | if (read_len < len) { | |
d3e2ba59 JD |
1519 | PERROR("Relay reading metadata file"); |
1520 | goto error; | |
1521 | } | |
2a174661 | 1522 | ctf_trace->metadata_sent += read_len; |
c4e361a4 | 1523 | reply.status = htobe32(LTTNG_VIEWER_METADATA_OK); |
d3e2ba59 JD |
1524 | goto send_reply; |
1525 | ||
1526 | error: | |
c4e361a4 | 1527 | reply.status = htobe32(LTTNG_VIEWER_METADATA_ERR); |
d3e2ba59 JD |
1528 | |
1529 | send_reply: | |
eea7556c | 1530 | health_code_update(); |
58eb9381 | 1531 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 1532 | if (ret < 0) { |
d3e2ba59 JD |
1533 | goto end_unlock; |
1534 | } | |
eea7556c | 1535 | health_code_update(); |
d3e2ba59 JD |
1536 | |
1537 | if (len > 0) { | |
58eb9381 | 1538 | ret = send_response(conn->sock, data, len); |
d3e2ba59 | 1539 | if (ret < 0) { |
d3e2ba59 JD |
1540 | goto end_unlock; |
1541 | } | |
1542 | } | |
1543 | ||
1544 | DBG("Sent %" PRIu64 " bytes of metadata for stream %" PRIu64, len, | |
1545 | be64toh(request.stream_id)); | |
1546 | ||
1547 | DBG("Metadata sent"); | |
1548 | ||
1549 | end_unlock: | |
1550 | free(data); | |
1551 | rcu_read_unlock(); | |
1552 | end: | |
1553 | return ret; | |
1554 | } | |
1555 | ||
c3b7390b JD |
1556 | /* |
1557 | * Create a viewer session. | |
1558 | * | |
1559 | * Return 0 on success or else a negative value. | |
1560 | */ | |
1561 | static | |
1562 | int viewer_create_session(struct relay_connection *conn) | |
1563 | { | |
1564 | int ret; | |
1565 | struct lttng_viewer_create_session_response resp; | |
1566 | ||
1567 | DBG("Viewer create session received"); | |
1568 | ||
1569 | resp.status = htobe32(LTTNG_VIEWER_CREATE_SESSION_OK); | |
1570 | conn->viewer_session = zmalloc(sizeof(conn->viewer_session)); | |
1571 | if (!conn->viewer_session) { | |
1572 | ERR("Allocation viewer session"); | |
1573 | resp.status = htobe32(LTTNG_VIEWER_CREATE_SESSION_ERR); | |
1574 | goto send_reply; | |
1575 | } | |
1576 | CDS_INIT_LIST_HEAD(&conn->viewer_session->sessions_head); | |
1577 | ||
1578 | send_reply: | |
1579 | health_code_update(); | |
1580 | ret = send_response(conn->sock, &resp, sizeof(resp)); | |
1581 | if (ret < 0) { | |
1582 | goto end; | |
1583 | } | |
1584 | health_code_update(); | |
1585 | ret = 0; | |
1586 | ||
1587 | end: | |
1588 | return ret; | |
1589 | } | |
1590 | ||
1591 | ||
d3e2ba59 JD |
1592 | /* |
1593 | * live_relay_unknown_command: send -1 if received unknown command | |
1594 | */ | |
1595 | static | |
58eb9381 | 1596 | void live_relay_unknown_command(struct relay_connection *conn) |
d3e2ba59 JD |
1597 | { |
1598 | struct lttcomm_relayd_generic_reply reply; | |
d3e2ba59 JD |
1599 | |
1600 | reply.ret_code = htobe32(LTTNG_ERR_UNK); | |
58eb9381 | 1601 | (void) send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 JD |
1602 | } |
1603 | ||
1604 | /* | |
1605 | * Process the commands received on the control socket | |
1606 | */ | |
1607 | static | |
1608 | int process_control(struct lttng_viewer_cmd *recv_hdr, | |
58eb9381 | 1609 | struct relay_connection *conn) |
d3e2ba59 JD |
1610 | { |
1611 | int ret = 0; | |
2f8f53af DG |
1612 | uint32_t msg_value; |
1613 | ||
1614 | assert(recv_hdr); | |
58eb9381 | 1615 | assert(conn); |
2f8f53af DG |
1616 | |
1617 | msg_value = be32toh(recv_hdr->cmd); | |
1618 | ||
1619 | /* | |
1620 | * Make sure we've done the version check before any command other then a | |
1621 | * new client connection. | |
1622 | */ | |
c4e361a4 | 1623 | if (msg_value != LTTNG_VIEWER_CONNECT && !conn->version_check_done) { |
58eb9381 | 1624 | ERR("Viewer conn value %" PRIu32 " before version check", msg_value); |
2f8f53af DG |
1625 | ret = -1; |
1626 | goto end; | |
1627 | } | |
d3e2ba59 | 1628 | |
2f8f53af | 1629 | switch (msg_value) { |
c4e361a4 | 1630 | case LTTNG_VIEWER_CONNECT: |
58eb9381 | 1631 | ret = viewer_connect(conn); |
d3e2ba59 | 1632 | break; |
c4e361a4 | 1633 | case LTTNG_VIEWER_LIST_SESSIONS: |
58eb9381 | 1634 | ret = viewer_list_sessions(conn); |
d3e2ba59 | 1635 | break; |
c4e361a4 | 1636 | case LTTNG_VIEWER_ATTACH_SESSION: |
58eb9381 | 1637 | ret = viewer_attach_session(conn); |
d3e2ba59 | 1638 | break; |
c4e361a4 | 1639 | case LTTNG_VIEWER_GET_NEXT_INDEX: |
58eb9381 | 1640 | ret = viewer_get_next_index(conn); |
d3e2ba59 | 1641 | break; |
c4e361a4 | 1642 | case LTTNG_VIEWER_GET_PACKET: |
58eb9381 | 1643 | ret = viewer_get_packet(conn); |
d3e2ba59 | 1644 | break; |
c4e361a4 | 1645 | case LTTNG_VIEWER_GET_METADATA: |
58eb9381 | 1646 | ret = viewer_get_metadata(conn); |
d3e2ba59 | 1647 | break; |
c4e361a4 | 1648 | case LTTNG_VIEWER_GET_NEW_STREAMS: |
58eb9381 | 1649 | ret = viewer_get_new_streams(conn); |
80e8027a | 1650 | break; |
c3b7390b JD |
1651 | case LTTNG_VIEWER_CREATE_SESSION: |
1652 | ret = viewer_create_session(conn); | |
1653 | break; | |
d3e2ba59 JD |
1654 | default: |
1655 | ERR("Received unknown viewer command (%u)", be32toh(recv_hdr->cmd)); | |
58eb9381 | 1656 | live_relay_unknown_command(conn); |
d3e2ba59 JD |
1657 | ret = -1; |
1658 | goto end; | |
1659 | } | |
1660 | ||
1661 | end: | |
1662 | return ret; | |
1663 | } | |
1664 | ||
1665 | static | |
58eb9381 | 1666 | void cleanup_connection_pollfd(struct lttng_poll_event *events, int pollfd) |
d3e2ba59 JD |
1667 | { |
1668 | int ret; | |
1669 | ||
1670 | assert(events); | |
1671 | ||
58eb9381 | 1672 | (void) lttng_poll_del(events, pollfd); |
d3e2ba59 JD |
1673 | |
1674 | ret = close(pollfd); | |
1675 | if (ret < 0) { | |
1676 | ERR("Closing pollfd %d", pollfd); | |
1677 | } | |
1678 | } | |
1679 | ||
157df586 JD |
1680 | /* |
1681 | * Delete all streams for a specific session ID. | |
1682 | */ | |
2a174661 | 1683 | static void destroy_viewer_streams_by_session(struct relay_session *session) |
d3e2ba59 | 1684 | { |
d3e2ba59 | 1685 | struct relay_viewer_stream *stream; |
d3e2ba59 JD |
1686 | struct lttng_ht_iter iter; |
1687 | ||
2a174661 DG |
1688 | assert(session); |
1689 | ||
d3e2ba59 | 1690 | rcu_read_lock(); |
157df586 JD |
1691 | cds_lfht_for_each_entry(viewer_streams_ht->ht, &iter.iter, stream, |
1692 | stream_n.node) { | |
2a174661 | 1693 | struct ctf_trace *ctf_trace; |
eea7556c | 1694 | |
2a174661 DG |
1695 | health_code_update(); |
1696 | if (stream->session_id != session->id) { | |
d3e2ba59 JD |
1697 | continue; |
1698 | } | |
1699 | ||
2a174661 DG |
1700 | ctf_trace = ctf_trace_find_by_path(session->ctf_traces_ht, |
1701 | stream->path_name); | |
1702 | assert(ctf_trace); | |
1703 | ||
2f8f53af | 1704 | viewer_stream_delete(stream); |
157df586 JD |
1705 | |
1706 | if (stream->metadata_flag) { | |
2a174661 DG |
1707 | ctf_trace->metadata_sent = 0; |
1708 | ctf_trace->viewer_metadata_stream = NULL; | |
d3e2ba59 | 1709 | } |
2a174661 DG |
1710 | |
1711 | viewer_stream_destroy(ctf_trace, stream); | |
d3e2ba59 JD |
1712 | } |
1713 | rcu_read_unlock(); | |
1714 | } | |
1715 | ||
2a174661 DG |
1716 | static void try_destroy_streams(struct relay_session *session) |
1717 | { | |
1718 | struct ctf_trace *ctf_trace; | |
1719 | struct lttng_ht_iter iter; | |
1720 | ||
1721 | assert(session); | |
1722 | ||
1723 | cds_lfht_for_each_entry(session->ctf_traces_ht->ht, &iter.iter, ctf_trace, | |
1724 | node.node) { | |
1725 | /* Attempt to destroy the ctf trace of that session. */ | |
1726 | ctf_trace_try_destroy(session, ctf_trace); | |
1727 | } | |
1728 | } | |
1729 | ||
d3e2ba59 | 1730 | /* |
58eb9381 | 1731 | * Delete and destroy a connection. |
d3e2ba59 JD |
1732 | * |
1733 | * RCU read side lock MUST be acquired. | |
1734 | */ | |
58eb9381 DG |
1735 | static void destroy_connection(struct lttng_ht *relay_connections_ht, |
1736 | struct relay_connection *conn) | |
d3e2ba59 | 1737 | { |
6763619c | 1738 | struct relay_session *session, *tmp_session; |
d3e2ba59 JD |
1739 | |
1740 | assert(relay_connections_ht); | |
58eb9381 | 1741 | assert(conn); |
d3e2ba59 | 1742 | |
58eb9381 | 1743 | connection_delete(relay_connections_ht, conn); |
d3e2ba59 | 1744 | |
6763619c JD |
1745 | if (!conn->viewer_session) { |
1746 | goto end; | |
1747 | } | |
1748 | ||
58eb9381 | 1749 | rcu_read_lock(); |
6763619c JD |
1750 | cds_list_for_each_entry_safe(session, tmp_session, |
1751 | &conn->viewer_session->sessions_head, | |
1752 | viewer_session_list) { | |
1753 | DBG("Cleaning connection of session ID %" PRIu64, session->id); | |
2a174661 DG |
1754 | /* |
1755 | * Very important that this is done before destroying the session so we | |
1756 | * can put back every viewer stream reference from the ctf_trace. | |
1757 | */ | |
1758 | destroy_viewer_streams_by_session(session); | |
1759 | try_destroy_streams(session); | |
6763619c | 1760 | cds_list_del(&session->viewer_session_list); |
58eb9381 | 1761 | session_viewer_try_destroy(conn->sessions_ht, session); |
2a174661 DG |
1762 | } |
1763 | rcu_read_unlock(); | |
d3e2ba59 | 1764 | |
6763619c | 1765 | end: |
58eb9381 | 1766 | connection_destroy(conn); |
d3e2ba59 JD |
1767 | } |
1768 | ||
1769 | /* | |
1770 | * This thread does the actual work | |
1771 | */ | |
1772 | static | |
1773 | void *thread_worker(void *data) | |
1774 | { | |
1775 | int ret, err = -1; | |
1776 | uint32_t nb_fd; | |
58eb9381 | 1777 | struct relay_connection *conn; |
d3e2ba59 JD |
1778 | struct lttng_poll_event events; |
1779 | struct lttng_ht *relay_connections_ht; | |
d3e2ba59 JD |
1780 | struct lttng_ht_iter iter; |
1781 | struct lttng_viewer_cmd recv_hdr; | |
1782 | struct relay_local_data *relay_ctx = (struct relay_local_data *) data; | |
1783 | struct lttng_ht *sessions_ht = relay_ctx->sessions_ht; | |
d3e2ba59 JD |
1784 | |
1785 | DBG("[thread] Live viewer relay worker started"); | |
1786 | ||
1787 | rcu_register_thread(); | |
1788 | ||
eea7556c MD |
1789 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_WORKER); |
1790 | ||
9b5e0863 MD |
1791 | if (testpoint(relayd_thread_live_worker)) { |
1792 | goto error_testpoint; | |
1793 | } | |
1794 | ||
d3e2ba59 JD |
1795 | /* table of connections indexed on socket */ |
1796 | relay_connections_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
1797 | if (!relay_connections_ht) { | |
1798 | goto relay_connections_ht_error; | |
1799 | } | |
1800 | ||
1801 | ret = create_thread_poll_set(&events, 2); | |
1802 | if (ret < 0) { | |
1803 | goto error_poll_create; | |
1804 | } | |
1805 | ||
58eb9381 | 1806 | ret = lttng_poll_add(&events, live_conn_pipe[0], LPOLLIN | LPOLLRDHUP); |
d3e2ba59 JD |
1807 | if (ret < 0) { |
1808 | goto error; | |
1809 | } | |
1810 | ||
1811 | restart: | |
1812 | while (1) { | |
1813 | int i; | |
1814 | ||
eea7556c MD |
1815 | health_code_update(); |
1816 | ||
d3e2ba59 JD |
1817 | /* Infinite blocking call, waiting for transmission */ |
1818 | DBG3("Relayd live viewer worker thread polling..."); | |
eea7556c | 1819 | health_poll_entry(); |
d3e2ba59 | 1820 | ret = lttng_poll_wait(&events, -1); |
eea7556c | 1821 | health_poll_exit(); |
d3e2ba59 JD |
1822 | if (ret < 0) { |
1823 | /* | |
1824 | * Restart interrupted system call. | |
1825 | */ | |
1826 | if (errno == EINTR) { | |
1827 | goto restart; | |
1828 | } | |
1829 | goto error; | |
1830 | } | |
1831 | ||
1832 | nb_fd = ret; | |
1833 | ||
1834 | /* | |
1835 | * Process control. The control connection is prioritised so we don't | |
1836 | * starve it with high throughput tracing data on the data | |
1837 | * connection. | |
1838 | */ | |
1839 | for (i = 0; i < nb_fd; i++) { | |
1840 | /* Fetch once the poll data */ | |
1841 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1842 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1843 | ||
eea7556c MD |
1844 | health_code_update(); |
1845 | ||
d3e2ba59 | 1846 | /* Thread quit pipe has been closed. Killing thread. */ |
2a174661 | 1847 | ret = check_live_conn_pipe(pollfd, revents); |
d3e2ba59 JD |
1848 | if (ret) { |
1849 | err = 0; | |
1850 | goto exit; | |
1851 | } | |
1852 | ||
58eb9381 DG |
1853 | /* Inspect the relay conn pipe for new connection */ |
1854 | if (pollfd == live_conn_pipe[0]) { | |
d3e2ba59 JD |
1855 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1856 | ERR("Relay live pipe error"); | |
1857 | goto error; | |
1858 | } else if (revents & LPOLLIN) { | |
58eb9381 | 1859 | ret = lttng_read(live_conn_pipe[0], &conn, sizeof(conn)); |
d3e2ba59 JD |
1860 | if (ret < 0) { |
1861 | goto error; | |
1862 | } | |
58eb9381 DG |
1863 | conn->sessions_ht = sessions_ht; |
1864 | connection_init(conn); | |
1865 | lttng_poll_add(&events, conn->sock->fd, | |
1866 | LPOLLIN | LPOLLRDHUP); | |
1867 | rcu_read_lock(); | |
1868 | lttng_ht_add_unique_ulong(relay_connections_ht, | |
1869 | &conn->sock_n); | |
d3e2ba59 | 1870 | rcu_read_unlock(); |
58eb9381 | 1871 | DBG("Connection socket %d added", conn->sock->fd); |
d3e2ba59 | 1872 | } |
58eb9381 DG |
1873 | } else { |
1874 | rcu_read_lock(); | |
1875 | conn = connection_find_by_sock(relay_connections_ht, pollfd); | |
1876 | /* If not found, there is a synchronization issue. */ | |
1877 | assert(conn); | |
1878 | ||
1879 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1880 | cleanup_connection_pollfd(&events, pollfd); | |
1881 | destroy_connection(relay_connections_ht, conn); | |
d3e2ba59 | 1882 | } else if (revents & LPOLLIN) { |
58eb9381 DG |
1883 | ret = conn->sock->ops->recvmsg(conn->sock, &recv_hdr, |
1884 | sizeof(recv_hdr), 0); | |
d3e2ba59 | 1885 | if (ret <= 0) { |
58eb9381 DG |
1886 | /* Connection closed */ |
1887 | cleanup_connection_pollfd(&events, pollfd); | |
1888 | destroy_connection(relay_connections_ht, conn); | |
1889 | DBG("Viewer control conn closed with %d", pollfd); | |
d3e2ba59 | 1890 | } else { |
58eb9381 | 1891 | ret = process_control(&recv_hdr, conn); |
d3e2ba59 JD |
1892 | if (ret < 0) { |
1893 | /* Clear the session on error. */ | |
58eb9381 DG |
1894 | cleanup_connection_pollfd(&events, pollfd); |
1895 | destroy_connection(relay_connections_ht, conn); | |
d3e2ba59 JD |
1896 | DBG("Viewer connection closed with %d", pollfd); |
1897 | } | |
1898 | } | |
1899 | } | |
1900 | rcu_read_unlock(); | |
1901 | } | |
1902 | } | |
1903 | } | |
1904 | ||
1905 | exit: | |
1906 | error: | |
1907 | lttng_poll_clean(&events); | |
1908 | ||
58eb9381 | 1909 | /* Cleanup reamaining connection object. */ |
d3e2ba59 | 1910 | rcu_read_lock(); |
58eb9381 DG |
1911 | cds_lfht_for_each_entry(relay_connections_ht->ht, &iter.iter, conn, |
1912 | sock_n.node) { | |
eea7556c | 1913 | health_code_update(); |
58eb9381 | 1914 | destroy_connection(relay_connections_ht, conn); |
d3e2ba59 JD |
1915 | } |
1916 | rcu_read_unlock(); | |
1917 | error_poll_create: | |
1918 | lttng_ht_destroy(relay_connections_ht); | |
1919 | relay_connections_ht_error: | |
58eb9381 DG |
1920 | /* Close relay conn pipes */ |
1921 | utils_close_pipe(live_conn_pipe); | |
d3e2ba59 JD |
1922 | if (err) { |
1923 | DBG("Viewer worker thread exited with error"); | |
1924 | } | |
1925 | DBG("Viewer worker thread cleanup complete"); | |
9b5e0863 | 1926 | error_testpoint: |
eea7556c MD |
1927 | if (err) { |
1928 | health_error(); | |
1929 | ERR("Health error occurred in %s", __func__); | |
1930 | } | |
1931 | health_unregister(health_relayd); | |
d3e2ba59 JD |
1932 | stop_threads(); |
1933 | rcu_unregister_thread(); | |
1934 | return NULL; | |
1935 | } | |
1936 | ||
1937 | /* | |
1938 | * Create the relay command pipe to wake thread_manage_apps. | |
1939 | * Closed in cleanup(). | |
1940 | */ | |
58eb9381 | 1941 | static int create_conn_pipe(void) |
d3e2ba59 JD |
1942 | { |
1943 | int ret; | |
1944 | ||
58eb9381 | 1945 | ret = utils_create_pipe_cloexec(live_conn_pipe); |
d3e2ba59 JD |
1946 | |
1947 | return ret; | |
1948 | } | |
1949 | ||
aaec7998 | 1950 | void live_stop_threads(void) |
d3e2ba59 JD |
1951 | { |
1952 | int ret; | |
1953 | void *status; | |
1954 | ||
1955 | stop_threads(); | |
1956 | ||
1957 | ret = pthread_join(live_listener_thread, &status); | |
1958 | if (ret != 0) { | |
1959 | PERROR("pthread_join live listener"); | |
1960 | goto error; /* join error, exit without cleanup */ | |
1961 | } | |
1962 | ||
1963 | ret = pthread_join(live_worker_thread, &status); | |
1964 | if (ret != 0) { | |
1965 | PERROR("pthread_join live worker"); | |
1966 | goto error; /* join error, exit without cleanup */ | |
1967 | } | |
1968 | ||
1969 | ret = pthread_join(live_dispatcher_thread, &status); | |
1970 | if (ret != 0) { | |
1971 | PERROR("pthread_join live dispatcher"); | |
1972 | goto error; /* join error, exit without cleanup */ | |
1973 | } | |
1974 | ||
1975 | cleanup(); | |
1976 | ||
1977 | error: | |
1978 | return; | |
1979 | } | |
1980 | ||
1981 | /* | |
1982 | * main | |
1983 | */ | |
1984 | int live_start_threads(struct lttng_uri *uri, | |
0b242f62 | 1985 | struct relay_local_data *relay_ctx) |
d3e2ba59 JD |
1986 | { |
1987 | int ret = 0; | |
1988 | void *status; | |
1989 | int is_root; | |
1990 | ||
1991 | assert(uri); | |
1992 | live_uri = uri; | |
1993 | ||
d3e2ba59 JD |
1994 | /* Check if daemon is UID = 0 */ |
1995 | is_root = !getuid(); | |
1996 | ||
1997 | if (!is_root) { | |
1998 | if (live_uri->port < 1024) { | |
1999 | ERR("Need to be root to use ports < 1024"); | |
2000 | ret = -1; | |
2001 | goto exit; | |
2002 | } | |
2003 | } | |
2004 | ||
2005 | /* Setup the thread apps communication pipe. */ | |
58eb9381 | 2006 | if ((ret = create_conn_pipe()) < 0) { |
d3e2ba59 JD |
2007 | goto exit; |
2008 | } | |
2009 | ||
2010 | /* Init relay command queue. */ | |
58eb9381 | 2011 | cds_wfq_init(&viewer_conn_queue.queue); |
d3e2ba59 JD |
2012 | |
2013 | /* Set up max poll set size */ | |
2014 | lttng_poll_set_max_size(); | |
2015 | ||
2016 | /* Setup the dispatcher thread */ | |
2017 | ret = pthread_create(&live_dispatcher_thread, NULL, | |
2018 | thread_dispatcher, (void *) NULL); | |
2019 | if (ret != 0) { | |
2020 | PERROR("pthread_create viewer dispatcher"); | |
2021 | goto exit_dispatcher; | |
2022 | } | |
2023 | ||
2024 | /* Setup the worker thread */ | |
2025 | ret = pthread_create(&live_worker_thread, NULL, | |
2026 | thread_worker, relay_ctx); | |
2027 | if (ret != 0) { | |
2028 | PERROR("pthread_create viewer worker"); | |
2029 | goto exit_worker; | |
2030 | } | |
2031 | ||
2032 | /* Setup the listener thread */ | |
2033 | ret = pthread_create(&live_listener_thread, NULL, | |
2034 | thread_listener, (void *) NULL); | |
2035 | if (ret != 0) { | |
2036 | PERROR("pthread_create viewer listener"); | |
2037 | goto exit_listener; | |
2038 | } | |
2039 | ||
2040 | ret = 0; | |
2041 | goto end; | |
2042 | ||
2043 | exit_listener: | |
2044 | ret = pthread_join(live_listener_thread, &status); | |
2045 | if (ret != 0) { | |
2046 | PERROR("pthread_join live listener"); | |
2047 | goto error; /* join error, exit without cleanup */ | |
2048 | } | |
2049 | ||
2050 | exit_worker: | |
2051 | ret = pthread_join(live_worker_thread, &status); | |
2052 | if (ret != 0) { | |
2053 | PERROR("pthread_join live worker"); | |
2054 | goto error; /* join error, exit without cleanup */ | |
2055 | } | |
2056 | ||
2057 | exit_dispatcher: | |
2058 | ret = pthread_join(live_dispatcher_thread, &status); | |
2059 | if (ret != 0) { | |
2060 | PERROR("pthread_join live dispatcher"); | |
2061 | goto error; /* join error, exit without cleanup */ | |
2062 | } | |
2063 | ||
2064 | exit: | |
2065 | cleanup(); | |
2066 | ||
2067 | end: | |
2068 | error: | |
2069 | return ret; | |
2070 | } |