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; | |
2f8f53af DG |
195 | struct lttng_ht_iter iter; |
196 | struct relay_viewer_stream *vstream; | |
197 | ||
2f8f53af DG |
198 | rcu_read_lock(); |
199 | ||
200 | cds_lfht_for_each_entry(viewer_streams_ht->ht, &iter.iter, vstream, | |
201 | stream_n.node) { | |
2a174661 | 202 | struct ctf_trace *ctf_trace; |
aaabc543 | 203 | struct lttng_viewer_stream send_stream = {}; |
2a174661 | 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 | */ | |
9edaf114 JG |
271 | static int make_viewer_streams(struct relay_session *relay_session, |
272 | struct relay_viewer_session *viewer_session, | |
b66a15d1 JG |
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; |
9edaf114 | 282 | struct relay_stream *relay_stream = NULL; |
2f8f53af | 283 | |
9edaf114 JG |
284 | assert(relay_session); |
285 | ASSERT_LOCKED(relay_session->lock); | |
2f8f53af | 286 | |
9edaf114 | 287 | if (!viewer_session->current_trace_chunk) { |
dbd6665b | 288 | ERR("Internal error: viewer session associated with session \"%s\" has a NULL trace chunk", |
9edaf114 | 289 | relay_session->session_name); |
dbd6665b JG |
290 | ret = -1; |
291 | goto error; | |
292 | } | |
293 | ||
9edaf114 | 294 | if (relay_session->connection_closed) { |
bddf80e4 MD |
295 | *closed = true; |
296 | } | |
297 | ||
2f8f53af | 298 | /* |
7591bab1 MD |
299 | * Create viewer streams for relay streams that are ready to be |
300 | * used for a the given session id only. | |
2f8f53af | 301 | */ |
2a174661 | 302 | rcu_read_lock(); |
9edaf114 JG |
303 | cds_lfht_for_each_entry (relay_session->ctf_traces_ht->ht, &iter.iter, |
304 | ctf_trace, node.node) { | |
123ed7c2 | 305 | bool trace_has_metadata_stream = false; |
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 | */ | |
9edaf114 JG |
317 | cds_list_for_each_entry_rcu(relay_stream, |
318 | &ctf_trace->stream_list, stream_node) | |
123ed7c2 | 319 | { |
9edaf114 JG |
320 | bool is_metadata_stream; |
321 | ||
322 | pthread_mutex_lock(&relay_stream->lock); | |
323 | is_metadata_stream = relay_stream->is_metadata; | |
324 | pthread_mutex_unlock(&relay_stream->lock); | |
325 | ||
326 | if (is_metadata_stream) { | |
123ed7c2 FD |
327 | trace_has_metadata_stream = true; |
328 | break; | |
329 | } | |
330 | } | |
331 | ||
9edaf114 JG |
332 | relay_stream = NULL; |
333 | ||
123ed7c2 FD |
334 | /* |
335 | * If there is no metadata stream in this trace at the moment | |
336 | * and we never sent one to the viewer, skip the trace. We | |
337 | * accept that the viewer will not see this trace at all. | |
338 | */ | |
339 | if (!trace_has_metadata_stream && | |
340 | !ctf_trace->metadata_stream_sent_to_viewer) { | |
3d7708ff JG |
341 | ctf_trace_put(ctf_trace); |
342 | continue; | |
123ed7c2 FD |
343 | } |
344 | ||
9edaf114 JG |
345 | cds_list_for_each_entry_rcu(relay_stream, |
346 | &ctf_trace->stream_list, stream_node) | |
347 | { | |
348 | struct relay_viewer_stream *viewer_stream; | |
2a174661 | 349 | |
9edaf114 | 350 | if (!stream_get(relay_stream)) { |
2a174661 DG |
351 | continue; |
352 | } | |
9edaf114 JG |
353 | |
354 | pthread_mutex_lock(&relay_stream->lock); | |
7591bab1 | 355 | /* |
d812ecb9 | 356 | * stream published is protected by the session lock. |
7591bab1 | 357 | */ |
9edaf114 | 358 | if (!relay_stream->published) { |
7591bab1 MD |
359 | goto next; |
360 | } | |
9edaf114 JG |
361 | viewer_stream = viewer_stream_get_by_id( |
362 | relay_stream->stream_handle); | |
363 | if (!viewer_stream) { | |
364 | struct lttng_trace_chunk *viewer_stream_trace_chunk; | |
365 | ||
123ed7c2 FD |
366 | /* |
367 | * Save that we sent the metadata stream to the | |
368 | * viewer. So that we know what trace the viewer | |
369 | * is aware of. | |
370 | */ | |
9edaf114 JG |
371 | if (relay_stream->is_metadata) { |
372 | ctf_trace->metadata_stream_sent_to_viewer = true; | |
373 | } | |
374 | ||
375 | /* | |
376 | * If a rotation is ongoing, use a copy of the | |
377 | * relay stream's chunk to ensure the stream | |
378 | * files exist. | |
379 | * | |
380 | * Otherwise, the viewer session's current trace | |
381 | * chunk can be used safely. | |
382 | */ | |
383 | if ((relay_stream->ongoing_rotation.is_set || | |
384 | relay_session->ongoing_rotation) && | |
385 | relay_stream->trace_chunk) { | |
386 | viewer_stream_trace_chunk = lttng_trace_chunk_copy( | |
387 | relay_stream->trace_chunk); | |
388 | if (!viewer_stream_trace_chunk) { | |
389 | ret = -1; | |
390 | ctf_trace_put(ctf_trace); | |
391 | goto error_unlock; | |
392 | } | |
393 | } else { | |
394 | const bool reference_acquired = lttng_trace_chunk_get( | |
395 | viewer_session->current_trace_chunk); | |
396 | ||
397 | assert(reference_acquired); | |
398 | viewer_stream_trace_chunk = | |
399 | viewer_session->current_trace_chunk; | |
123ed7c2 | 400 | } |
9edaf114 JG |
401 | |
402 | viewer_stream = viewer_stream_create( | |
403 | relay_stream, | |
404 | viewer_stream_trace_chunk, | |
405 | seek_t); | |
406 | lttng_trace_chunk_put(viewer_stream_trace_chunk); | |
407 | viewer_stream_trace_chunk = NULL; | |
408 | if (!viewer_stream) { | |
2a174661 | 409 | ret = -1; |
7591bab1 | 410 | ctf_trace_put(ctf_trace); |
2a174661 DG |
411 | goto error_unlock; |
412 | } | |
2a174661 DG |
413 | |
414 | if (nb_created) { | |
415 | /* Update number of created stream counter. */ | |
416 | (*nb_created)++; | |
417 | } | |
2229a09c MD |
418 | /* |
419 | * Ensure a self-reference is preserved even | |
420 | * after we have put our local reference. | |
421 | */ | |
9edaf114 | 422 | if (!viewer_stream_get(viewer_stream)) { |
862d3a3b MD |
423 | ERR("Unable to get self-reference on viewer stream, logic error."); |
424 | abort(); | |
425 | } | |
7591bab1 | 426 | } else { |
9edaf114 | 427 | if (!viewer_stream->sent_flag && nb_unsent) { |
7591bab1 MD |
428 | /* Update number of unsent stream counter. */ |
429 | (*nb_unsent)++; | |
430 | } | |
2f8f53af | 431 | } |
2a174661 DG |
432 | /* Update number of total stream counter. */ |
433 | if (nb_total) { | |
9edaf114 JG |
434 | if (relay_stream->is_metadata) { |
435 | if (!relay_stream->closed || | |
436 | relay_stream->metadata_received > | |
437 | viewer_stream->metadata_sent) { | |
2229a09c MD |
438 | (*nb_total)++; |
439 | } | |
440 | } else { | |
9edaf114 JG |
441 | if (!relay_stream->closed || |
442 | !(((int64_t)(relay_stream->prev_data_seq - | |
443 | relay_stream->last_net_seq_num)) >= | |
444 | 0)) { | |
2229a09c MD |
445 | (*nb_total)++; |
446 | } | |
447 | } | |
2f8f53af | 448 | } |
2229a09c | 449 | /* Put local reference. */ |
9edaf114 | 450 | viewer_stream_put(viewer_stream); |
7591bab1 | 451 | next: |
9edaf114 JG |
452 | pthread_mutex_unlock(&relay_stream->lock); |
453 | stream_put(relay_stream); | |
2f8f53af | 454 | } |
9edaf114 | 455 | relay_stream = NULL; |
7591bab1 | 456 | ctf_trace_put(ctf_trace); |
2f8f53af DG |
457 | } |
458 | ||
459 | ret = 0; | |
460 | ||
461 | error_unlock: | |
2a174661 | 462 | rcu_read_unlock(); |
dbd6665b | 463 | error: |
9edaf114 JG |
464 | if (relay_stream) { |
465 | pthread_mutex_unlock(&relay_stream->lock); | |
466 | stream_put(relay_stream); | |
467 | } | |
468 | ||
2f8f53af DG |
469 | return ret; |
470 | } | |
471 | ||
b4aacfdc | 472 | int relayd_live_stop(void) |
d3e2ba59 | 473 | { |
b4aacfdc | 474 | /* Stop dispatch thread */ |
d3e2ba59 | 475 | CMM_STORE_SHARED(live_dispatch_thread_exit, 1); |
58eb9381 | 476 | futex_nto1_wake(&viewer_conn_queue.futex); |
b4aacfdc | 477 | return 0; |
d3e2ba59 JD |
478 | } |
479 | ||
d3e2ba59 JD |
480 | /* |
481 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
482 | */ | |
483 | static | |
23f940ff JG |
484 | int create_named_thread_poll_set(struct lttng_poll_event *events, |
485 | int size, const char *name) | |
d3e2ba59 JD |
486 | { |
487 | int ret; | |
488 | ||
489 | if (events == NULL || size == 0) { | |
490 | ret = -1; | |
491 | goto error; | |
492 | } | |
493 | ||
23f940ff JG |
494 | ret = fd_tracker_util_poll_create(the_fd_tracker, |
495 | name, events, 1, LTTNG_CLOEXEC); | |
ad36f3a7 JG |
496 | if (ret) { |
497 | PERROR("Failed to create \"%s\" poll file descriptor", name); | |
498 | goto error; | |
499 | } | |
d3e2ba59 JD |
500 | |
501 | /* Add quit pipe */ | |
bcf4a440 | 502 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN | LPOLLERR); |
d3e2ba59 JD |
503 | if (ret < 0) { |
504 | goto error; | |
505 | } | |
506 | ||
507 | return 0; | |
508 | ||
509 | error: | |
510 | return ret; | |
511 | } | |
512 | ||
513 | /* | |
514 | * Check if the thread quit pipe was triggered. | |
515 | * | |
516 | * Return 1 if it was triggered else 0; | |
517 | */ | |
518 | static | |
bcf4a440 | 519 | int check_thread_quit_pipe(int fd, uint32_t events) |
d3e2ba59 | 520 | { |
bcf4a440 | 521 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { |
d3e2ba59 JD |
522 | return 1; |
523 | } | |
524 | ||
525 | return 0; | |
526 | } | |
527 | ||
8855795d JG |
528 | static |
529 | int create_sock(void *data, int *out_fd) | |
530 | { | |
531 | int ret; | |
532 | struct lttcomm_sock *sock = data; | |
533 | ||
534 | ret = lttcomm_create_sock(sock); | |
535 | if (ret < 0) { | |
536 | goto end; | |
537 | } | |
538 | ||
539 | *out_fd = sock->fd; | |
540 | end: | |
541 | return ret; | |
542 | } | |
543 | ||
544 | static | |
545 | int close_sock(void *data, int *in_fd) | |
546 | { | |
547 | struct lttcomm_sock *sock = data; | |
548 | ||
549 | return sock->ops->close(sock); | |
550 | } | |
551 | ||
29555a78 JG |
552 | static int accept_sock(void *data, int *out_fd) |
553 | { | |
554 | int ret = 0; | |
555 | /* Socks is an array of in_sock, out_sock. */ | |
556 | struct lttcomm_sock **socks = data; | |
557 | struct lttcomm_sock *in_sock = socks[0]; | |
558 | ||
559 | socks[1] = in_sock->ops->accept(in_sock); | |
560 | if (!socks[1]) { | |
561 | ret = -1; | |
562 | goto end; | |
563 | } | |
564 | *out_fd = socks[1]->fd; | |
565 | end: | |
566 | return ret; | |
567 | } | |
568 | ||
569 | static | |
570 | struct lttcomm_sock *accept_live_sock(struct lttcomm_sock *listening_sock, | |
571 | const char *name) | |
572 | { | |
573 | int out_fd, ret; | |
574 | struct lttcomm_sock *socks[2] = { listening_sock, NULL }; | |
575 | struct lttcomm_sock *new_sock = NULL; | |
576 | ||
577 | ret = fd_tracker_open_unsuspendable_fd(the_fd_tracker, &out_fd, | |
578 | (const char **) &name, 1, accept_sock, &socks); | |
579 | if (ret) { | |
580 | goto end; | |
581 | } | |
582 | new_sock = socks[1]; | |
583 | DBG("%s accepted, socket %d", name, new_sock->fd); | |
584 | end: | |
585 | return new_sock; | |
586 | } | |
587 | ||
d3e2ba59 JD |
588 | /* |
589 | * Create and init socket from uri. | |
590 | */ | |
591 | static | |
8855795d | 592 | struct lttcomm_sock *init_socket(struct lttng_uri *uri, const char *name) |
d3e2ba59 | 593 | { |
8855795d | 594 | int ret, sock_fd; |
d3e2ba59 | 595 | struct lttcomm_sock *sock = NULL; |
8855795d JG |
596 | char uri_str[LTTNG_PATH_MAX]; |
597 | char *formated_name = NULL; | |
d3e2ba59 JD |
598 | |
599 | sock = lttcomm_alloc_sock_from_uri(uri); | |
600 | if (sock == NULL) { | |
601 | ERR("Allocating socket"); | |
602 | goto error; | |
603 | } | |
604 | ||
8855795d JG |
605 | /* |
606 | * Don't fail to create the socket if the name can't be built as it is | |
607 | * only used for debugging purposes. | |
608 | */ | |
609 | ret = uri_to_str_url(uri, uri_str, sizeof(uri_str)); | |
610 | uri_str[sizeof(uri_str) - 1] = '\0'; | |
611 | if (ret >= 0) { | |
612 | ret = asprintf(&formated_name, "%s socket @ %s", name, | |
613 | uri_str); | |
614 | if (ret < 0) { | |
615 | formated_name = NULL; | |
616 | } | |
d3e2ba59 | 617 | } |
8855795d JG |
618 | |
619 | ret = fd_tracker_open_unsuspendable_fd(the_fd_tracker, &sock_fd, | |
620 | (const char **) (formated_name ? &formated_name : NULL), | |
621 | 1, create_sock, sock); | |
d546eeec JG |
622 | if (ret) { |
623 | PERROR("Failed to create \"%s\" socket", | |
624 | formated_name ?: "Unknown"); | |
625 | goto error; | |
626 | } | |
8855795d | 627 | DBG("Listening on %s socket %d", name, sock->fd); |
d3e2ba59 JD |
628 | |
629 | ret = sock->ops->bind(sock); | |
630 | if (ret < 0) { | |
2288467f | 631 | PERROR("Failed to bind lttng-live socket"); |
d3e2ba59 JD |
632 | goto error; |
633 | } | |
634 | ||
635 | ret = sock->ops->listen(sock, -1); | |
636 | if (ret < 0) { | |
637 | goto error; | |
638 | ||
639 | } | |
640 | ||
d546eeec | 641 | free(formated_name); |
d3e2ba59 JD |
642 | return sock; |
643 | ||
644 | error: | |
645 | if (sock) { | |
646 | lttcomm_destroy_sock(sock); | |
647 | } | |
d546eeec | 648 | free(formated_name); |
d3e2ba59 JD |
649 | return NULL; |
650 | } | |
651 | ||
652 | /* | |
653 | * This thread manages the listening for new connections on the network | |
654 | */ | |
655 | static | |
656 | void *thread_listener(void *data) | |
657 | { | |
658 | int i, ret, pollfd, err = -1; | |
d3e2ba59 JD |
659 | uint32_t revents, nb_fd; |
660 | struct lttng_poll_event events; | |
661 | struct lttcomm_sock *live_control_sock; | |
662 | ||
663 | DBG("[thread] Relay live listener started"); | |
664 | ||
8fba2b8d | 665 | rcu_register_thread(); |
eea7556c MD |
666 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_LISTENER); |
667 | ||
668 | health_code_update(); | |
669 | ||
8855795d | 670 | live_control_sock = init_socket(live_uri, "Live listener"); |
d3e2ba59 JD |
671 | if (!live_control_sock) { |
672 | goto error_sock_control; | |
673 | } | |
674 | ||
fb4d42ab | 675 | /* Pass 2 as size here for the thread quit pipe and control sockets. */ |
23f940ff JG |
676 | ret = create_named_thread_poll_set(&events, 2, |
677 | "Live listener thread epoll"); | |
d3e2ba59 JD |
678 | if (ret < 0) { |
679 | goto error_create_poll; | |
680 | } | |
681 | ||
682 | /* Add the control socket */ | |
683 | ret = lttng_poll_add(&events, live_control_sock->fd, LPOLLIN | LPOLLRDHUP); | |
684 | if (ret < 0) { | |
685 | goto error_poll_add; | |
686 | } | |
687 | ||
3fd27398 MD |
688 | lttng_relay_notify_ready(); |
689 | ||
9b5e0863 MD |
690 | if (testpoint(relayd_thread_live_listener)) { |
691 | goto error_testpoint; | |
692 | } | |
693 | ||
d3e2ba59 | 694 | while (1) { |
eea7556c MD |
695 | health_code_update(); |
696 | ||
d3e2ba59 JD |
697 | DBG("Listener accepting live viewers connections"); |
698 | ||
699 | restart: | |
eea7556c | 700 | health_poll_entry(); |
d3e2ba59 | 701 | ret = lttng_poll_wait(&events, -1); |
eea7556c | 702 | health_poll_exit(); |
d3e2ba59 JD |
703 | if (ret < 0) { |
704 | /* | |
705 | * Restart interrupted system call. | |
706 | */ | |
707 | if (errno == EINTR) { | |
708 | goto restart; | |
709 | } | |
710 | goto error; | |
711 | } | |
712 | nb_fd = ret; | |
713 | ||
714 | DBG("Relay new viewer connection received"); | |
715 | for (i = 0; i < nb_fd; i++) { | |
eea7556c MD |
716 | health_code_update(); |
717 | ||
d3e2ba59 JD |
718 | /* Fetch once the poll data */ |
719 | revents = LTTNG_POLL_GETEV(&events, i); | |
720 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
721 | ||
722 | /* Thread quit pipe has been closed. Killing thread. */ | |
bcf4a440 | 723 | ret = check_thread_quit_pipe(pollfd, revents); |
d3e2ba59 JD |
724 | if (ret) { |
725 | err = 0; | |
726 | goto exit; | |
727 | } | |
728 | ||
03e43155 | 729 | if (revents & LPOLLIN) { |
d3e2ba59 | 730 | /* |
7591bab1 MD |
731 | * A new connection is requested, therefore a |
732 | * viewer connection is allocated in this | |
733 | * thread, enqueued to a global queue and | |
734 | * dequeued (and freed) in the worker thread. | |
d3e2ba59 | 735 | */ |
58eb9381 DG |
736 | int val = 1; |
737 | struct relay_connection *new_conn; | |
d3e2ba59 JD |
738 | struct lttcomm_sock *newsock; |
739 | ||
29555a78 JG |
740 | newsock = accept_live_sock(live_control_sock, |
741 | "Live socket to client"); | |
d3e2ba59 JD |
742 | if (!newsock) { |
743 | PERROR("accepting control sock"); | |
d3e2ba59 JD |
744 | goto error; |
745 | } | |
746 | DBG("Relay viewer connection accepted socket %d", newsock->fd); | |
58eb9381 | 747 | |
d3e2ba59 | 748 | ret = setsockopt(newsock->fd, SOL_SOCKET, SO_REUSEADDR, &val, |
58eb9381 | 749 | sizeof(val)); |
d3e2ba59 JD |
750 | if (ret < 0) { |
751 | PERROR("setsockopt inet"); | |
752 | lttcomm_destroy_sock(newsock); | |
d3e2ba59 JD |
753 | goto error; |
754 | } | |
7591bab1 MD |
755 | new_conn = connection_create(newsock, RELAY_CONNECTION_UNKNOWN); |
756 | if (!new_conn) { | |
757 | lttcomm_destroy_sock(newsock); | |
758 | goto error; | |
759 | } | |
760 | /* Ownership assumed by the connection. */ | |
761 | newsock = NULL; | |
d3e2ba59 | 762 | |
58eb9381 | 763 | /* Enqueue request for the dispatcher thread. */ |
8bdee6e2 SM |
764 | cds_wfcq_enqueue(&viewer_conn_queue.head, &viewer_conn_queue.tail, |
765 | &new_conn->qnode); | |
d3e2ba59 JD |
766 | |
767 | /* | |
7591bab1 MD |
768 | * Wake the dispatch queue futex. |
769 | * Implicit memory barrier with the | |
770 | * exchange in cds_wfcq_enqueue. | |
d3e2ba59 | 771 | */ |
58eb9381 | 772 | futex_nto1_wake(&viewer_conn_queue.futex); |
03e43155 MD |
773 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
774 | ERR("socket poll error"); | |
775 | goto error; | |
776 | } else { | |
777 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
778 | goto error; | |
d3e2ba59 JD |
779 | } |
780 | } | |
781 | } | |
782 | ||
783 | exit: | |
784 | error: | |
785 | error_poll_add: | |
9b5e0863 | 786 | error_testpoint: |
23f940ff | 787 | (void) fd_tracker_util_poll_clean(the_fd_tracker, &events); |
d3e2ba59 JD |
788 | error_create_poll: |
789 | if (live_control_sock->fd >= 0) { | |
8855795d JG |
790 | int sock_fd = live_control_sock->fd; |
791 | ||
792 | ret = fd_tracker_close_unsuspendable_fd(the_fd_tracker, | |
793 | &sock_fd, 1, close_sock, | |
794 | live_control_sock); | |
d3e2ba59 JD |
795 | if (ret) { |
796 | PERROR("close"); | |
797 | } | |
8855795d | 798 | live_control_sock->fd = -1; |
d3e2ba59 JD |
799 | } |
800 | lttcomm_destroy_sock(live_control_sock); | |
801 | error_sock_control: | |
802 | if (err) { | |
eea7556c | 803 | health_error(); |
d3e2ba59 JD |
804 | DBG("Live viewer listener thread exited with error"); |
805 | } | |
eea7556c | 806 | health_unregister(health_relayd); |
8fba2b8d | 807 | rcu_unregister_thread(); |
d3e2ba59 | 808 | DBG("Live viewer listener thread cleanup complete"); |
b4aacfdc MD |
809 | if (lttng_relay_stop_threads()) { |
810 | ERR("Error stopping threads"); | |
178a0557 | 811 | } |
d3e2ba59 JD |
812 | return NULL; |
813 | } | |
814 | ||
815 | /* | |
816 | * This thread manages the dispatching of the requests to worker threads | |
817 | */ | |
818 | static | |
819 | void *thread_dispatcher(void *data) | |
820 | { | |
6cd525e8 MD |
821 | int err = -1; |
822 | ssize_t ret; | |
8bdee6e2 | 823 | struct cds_wfcq_node *node; |
58eb9381 | 824 | struct relay_connection *conn = NULL; |
d3e2ba59 JD |
825 | |
826 | DBG("[thread] Live viewer relay dispatcher started"); | |
827 | ||
eea7556c MD |
828 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_DISPATCHER); |
829 | ||
9b5e0863 MD |
830 | if (testpoint(relayd_thread_live_dispatcher)) { |
831 | goto error_testpoint; | |
832 | } | |
833 | ||
eea7556c MD |
834 | health_code_update(); |
835 | ||
0ed3b1a8 | 836 | for (;;) { |
eea7556c MD |
837 | health_code_update(); |
838 | ||
d3e2ba59 | 839 | /* Atomically prepare the queue futex */ |
58eb9381 | 840 | futex_nto1_prepare(&viewer_conn_queue.futex); |
d3e2ba59 | 841 | |
0ed3b1a8 MD |
842 | if (CMM_LOAD_SHARED(live_dispatch_thread_exit)) { |
843 | break; | |
844 | } | |
845 | ||
d3e2ba59 | 846 | do { |
eea7556c MD |
847 | health_code_update(); |
848 | ||
d3e2ba59 | 849 | /* Dequeue commands */ |
8bdee6e2 SM |
850 | node = cds_wfcq_dequeue_blocking(&viewer_conn_queue.head, |
851 | &viewer_conn_queue.tail); | |
d3e2ba59 JD |
852 | if (node == NULL) { |
853 | DBG("Woken up but nothing in the live-viewer " | |
854 | "relay command queue"); | |
855 | /* Continue thread execution */ | |
856 | break; | |
857 | } | |
58eb9381 | 858 | conn = caa_container_of(node, struct relay_connection, qnode); |
d3e2ba59 | 859 | DBG("Dispatching viewer request waiting on sock %d", |
58eb9381 | 860 | conn->sock->fd); |
d3e2ba59 JD |
861 | |
862 | /* | |
7591bab1 MD |
863 | * Inform worker thread of the new request. This |
864 | * call is blocking so we can be assured that | |
865 | * the data will be read at some point in time | |
866 | * or wait to the end of the world :) | |
d3e2ba59 | 867 | */ |
58eb9381 DG |
868 | ret = lttng_write(live_conn_pipe[1], &conn, sizeof(conn)); |
869 | if (ret < 0) { | |
870 | PERROR("write conn pipe"); | |
7591bab1 | 871 | connection_put(conn); |
d3e2ba59 JD |
872 | goto error; |
873 | } | |
874 | } while (node != NULL); | |
875 | ||
876 | /* Futex wait on queue. Blocking call on futex() */ | |
eea7556c | 877 | health_poll_entry(); |
58eb9381 | 878 | futex_nto1_wait(&viewer_conn_queue.futex); |
eea7556c | 879 | health_poll_exit(); |
d3e2ba59 JD |
880 | } |
881 | ||
eea7556c MD |
882 | /* Normal exit, no error */ |
883 | err = 0; | |
884 | ||
d3e2ba59 | 885 | error: |
9b5e0863 | 886 | error_testpoint: |
eea7556c MD |
887 | if (err) { |
888 | health_error(); | |
889 | ERR("Health error occurred in %s", __func__); | |
890 | } | |
891 | health_unregister(health_relayd); | |
d3e2ba59 | 892 | DBG("Live viewer dispatch thread dying"); |
b4aacfdc MD |
893 | if (lttng_relay_stop_threads()) { |
894 | ERR("Error stopping threads"); | |
178a0557 | 895 | } |
d3e2ba59 JD |
896 | return NULL; |
897 | } | |
898 | ||
899 | /* | |
900 | * Establish connection with the viewer and check the versions. | |
901 | * | |
902 | * Return 0 on success or else negative value. | |
903 | */ | |
904 | static | |
58eb9381 | 905 | int viewer_connect(struct relay_connection *conn) |
d3e2ba59 JD |
906 | { |
907 | int ret; | |
908 | struct lttng_viewer_connect reply, msg; | |
909 | ||
58eb9381 | 910 | conn->version_check_done = 1; |
d3e2ba59 | 911 | |
eea7556c MD |
912 | health_code_update(); |
913 | ||
2f8f53af DG |
914 | DBG("Viewer is establishing a connection to the relayd."); |
915 | ||
58eb9381 | 916 | ret = recv_request(conn->sock, &msg, sizeof(msg)); |
2f8f53af | 917 | if (ret < 0) { |
d3e2ba59 JD |
918 | goto end; |
919 | } | |
920 | ||
eea7556c MD |
921 | health_code_update(); |
922 | ||
f46b2ce6 | 923 | memset(&reply, 0, sizeof(reply)); |
d3e2ba59 JD |
924 | reply.major = RELAYD_VERSION_COMM_MAJOR; |
925 | reply.minor = RELAYD_VERSION_COMM_MINOR; | |
926 | ||
927 | /* Major versions must be the same */ | |
928 | if (reply.major != be32toh(msg.major)) { | |
2f8f53af DG |
929 | DBG("Incompatible major versions ([relayd] %u vs [client] %u)", |
930 | reply.major, be32toh(msg.major)); | |
72180669 | 931 | ret = -1; |
d3e2ba59 JD |
932 | goto end; |
933 | } | |
934 | ||
58eb9381 | 935 | conn->major = reply.major; |
d3e2ba59 JD |
936 | /* We adapt to the lowest compatible version */ |
937 | if (reply.minor <= be32toh(msg.minor)) { | |
58eb9381 | 938 | conn->minor = reply.minor; |
d3e2ba59 | 939 | } else { |
58eb9381 | 940 | conn->minor = be32toh(msg.minor); |
d3e2ba59 JD |
941 | } |
942 | ||
c4e361a4 | 943 | if (be32toh(msg.type) == LTTNG_VIEWER_CLIENT_COMMAND) { |
58eb9381 | 944 | conn->type = RELAY_VIEWER_COMMAND; |
c4e361a4 | 945 | } else if (be32toh(msg.type) == LTTNG_VIEWER_CLIENT_NOTIFICATION) { |
58eb9381 | 946 | conn->type = RELAY_VIEWER_NOTIFICATION; |
d3e2ba59 JD |
947 | } else { |
948 | ERR("Unknown connection type : %u", be32toh(msg.type)); | |
949 | ret = -1; | |
950 | goto end; | |
951 | } | |
952 | ||
953 | reply.major = htobe32(reply.major); | |
954 | reply.minor = htobe32(reply.minor); | |
58eb9381 | 955 | if (conn->type == RELAY_VIEWER_COMMAND) { |
93b4787b | 956 | /* |
7591bab1 MD |
957 | * Increment outside of htobe64 macro, because the argument can |
958 | * be used more than once within the macro, and thus the | |
959 | * operation may be undefined. | |
93b4787b | 960 | */ |
7591bab1 | 961 | pthread_mutex_lock(&last_relay_viewer_session_id_lock); |
93b4787b | 962 | last_relay_viewer_session_id++; |
7591bab1 | 963 | pthread_mutex_unlock(&last_relay_viewer_session_id_lock); |
93b4787b | 964 | reply.viewer_session_id = htobe64(last_relay_viewer_session_id); |
d3e2ba59 | 965 | } |
eea7556c MD |
966 | |
967 | health_code_update(); | |
968 | ||
58eb9381 | 969 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 970 | if (ret < 0) { |
2f8f53af | 971 | goto end; |
d3e2ba59 JD |
972 | } |
973 | ||
eea7556c MD |
974 | health_code_update(); |
975 | ||
58eb9381 | 976 | DBG("Version check done using protocol %u.%u", conn->major, conn->minor); |
d3e2ba59 JD |
977 | ret = 0; |
978 | ||
979 | end: | |
980 | return ret; | |
981 | } | |
982 | ||
983 | /* | |
984 | * Send the viewer the list of current sessions. | |
7591bab1 MD |
985 | * We need to create a copy of the hash table content because otherwise |
986 | * we cannot assume the number of entries stays the same between getting | |
987 | * the number of HT elements and iteration over the HT. | |
d3e2ba59 JD |
988 | * |
989 | * Return 0 on success or else a negative value. | |
990 | */ | |
991 | static | |
58eb9381 | 992 | int viewer_list_sessions(struct relay_connection *conn) |
d3e2ba59 | 993 | { |
5f10c6b1 | 994 | int ret = 0; |
d3e2ba59 | 995 | struct lttng_viewer_list_sessions session_list; |
d3e2ba59 | 996 | struct lttng_ht_iter iter; |
d3e2ba59 | 997 | struct relay_session *session; |
7591bab1 MD |
998 | struct lttng_viewer_session *send_session_buf = NULL; |
999 | uint32_t buf_count = SESSION_BUF_DEFAULT_COUNT; | |
1000 | uint32_t count = 0; | |
d3e2ba59 JD |
1001 | |
1002 | DBG("List sessions received"); | |
1003 | ||
7591bab1 MD |
1004 | send_session_buf = zmalloc(SESSION_BUF_DEFAULT_COUNT * sizeof(*send_session_buf)); |
1005 | if (!send_session_buf) { | |
1006 | return -1; | |
d3e2ba59 JD |
1007 | } |
1008 | ||
7591bab1 MD |
1009 | rcu_read_lock(); |
1010 | cds_lfht_for_each_entry(sessions_ht->ht, &iter.iter, session, | |
2f8f53af | 1011 | session_n.node) { |
7591bab1 | 1012 | struct lttng_viewer_session *send_session; |
d3e2ba59 | 1013 | |
eea7556c MD |
1014 | health_code_update(); |
1015 | ||
d995f382 | 1016 | pthread_mutex_lock(&session->lock); |
7e0a4379 JR |
1017 | if (session->connection_closed) { |
1018 | /* Skip closed session */ | |
d995f382 JG |
1019 | goto next_session; |
1020 | } | |
1021 | if (!session->current_trace_chunk) { | |
1022 | /* | |
1023 | * Skip un-attachable session. It is either | |
1024 | * being destroyed or has not had a trace | |
1025 | * chunk created against it yet. | |
1026 | */ | |
1027 | goto next_session; | |
7e0a4379 JR |
1028 | } |
1029 | ||
7591bab1 MD |
1030 | if (count >= buf_count) { |
1031 | struct lttng_viewer_session *newbuf; | |
1032 | uint32_t new_buf_count = buf_count << 1; | |
eea7556c | 1033 | |
7591bab1 MD |
1034 | newbuf = realloc(send_session_buf, |
1035 | new_buf_count * sizeof(*send_session_buf)); | |
1036 | if (!newbuf) { | |
1037 | ret = -1; | |
d995f382 | 1038 | goto break_loop; |
7591bab1 MD |
1039 | } |
1040 | send_session_buf = newbuf; | |
1041 | buf_count = new_buf_count; | |
6763619c | 1042 | } |
7591bab1 | 1043 | send_session = &send_session_buf[count]; |
bfc3fb17 MD |
1044 | if (lttng_strncpy(send_session->session_name, |
1045 | session->session_name, | |
1046 | sizeof(send_session->session_name))) { | |
1047 | ret = -1; | |
d995f382 | 1048 | goto break_loop; |
bfc3fb17 MD |
1049 | } |
1050 | if (lttng_strncpy(send_session->hostname, session->hostname, | |
1051 | sizeof(send_session->hostname))) { | |
1052 | ret = -1; | |
d995f382 | 1053 | goto break_loop; |
bfc3fb17 | 1054 | } |
7591bab1 MD |
1055 | send_session->id = htobe64(session->id); |
1056 | send_session->live_timer = htobe32(session->live_timer); | |
1057 | if (session->viewer_attached) { | |
1058 | send_session->clients = htobe32(1); | |
1059 | } else { | |
1060 | send_session->clients = htobe32(0); | |
d227d5bd | 1061 | } |
7591bab1 MD |
1062 | send_session->streams = htobe32(session->stream_count); |
1063 | count++; | |
d995f382 JG |
1064 | next_session: |
1065 | pthread_mutex_unlock(&session->lock); | |
1066 | continue; | |
1067 | break_loop: | |
1068 | pthread_mutex_unlock(&session->lock); | |
1069 | break; | |
7591bab1 MD |
1070 | } |
1071 | rcu_read_unlock(); | |
5f10c6b1 JG |
1072 | if (ret < 0) { |
1073 | goto end_free; | |
1074 | } | |
d227d5bd | 1075 | |
7591bab1 | 1076 | session_list.sessions_count = htobe32(count); |
d227d5bd | 1077 | |
7591bab1 | 1078 | health_code_update(); |
d227d5bd | 1079 | |
7591bab1 MD |
1080 | ret = send_response(conn->sock, &session_list, sizeof(session_list)); |
1081 | if (ret < 0) { | |
1082 | goto end_free; | |
d227d5bd | 1083 | } |
d227d5bd | 1084 | |
7591bab1 | 1085 | health_code_update(); |
d227d5bd | 1086 | |
7591bab1 MD |
1087 | ret = send_response(conn->sock, send_session_buf, |
1088 | count * sizeof(*send_session_buf)); | |
1089 | if (ret < 0) { | |
1090 | goto end_free; | |
d227d5bd | 1091 | } |
7591bab1 | 1092 | health_code_update(); |
d227d5bd | 1093 | |
7591bab1 MD |
1094 | ret = 0; |
1095 | end_free: | |
1096 | free(send_session_buf); | |
1097 | return ret; | |
d227d5bd JD |
1098 | } |
1099 | ||
80e8027a | 1100 | /* |
7591bab1 | 1101 | * Send the viewer the list of current streams. |
80e8027a JD |
1102 | */ |
1103 | static | |
58eb9381 | 1104 | int viewer_get_new_streams(struct relay_connection *conn) |
80e8027a JD |
1105 | { |
1106 | int ret, send_streams = 0; | |
7591bab1 | 1107 | uint32_t nb_created = 0, nb_unsent = 0, nb_streams = 0, nb_total = 0; |
80e8027a JD |
1108 | struct lttng_viewer_new_streams_request request; |
1109 | struct lttng_viewer_new_streams_response response; | |
b66a15d1 | 1110 | struct relay_session *session = NULL; |
6763619c | 1111 | uint64_t session_id; |
bddf80e4 | 1112 | bool closed = false; |
80e8027a | 1113 | |
58eb9381 | 1114 | assert(conn); |
80e8027a JD |
1115 | |
1116 | DBG("Get new streams received"); | |
1117 | ||
80e8027a JD |
1118 | health_code_update(); |
1119 | ||
2f8f53af | 1120 | /* Receive the request from the connected client. */ |
58eb9381 | 1121 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 1122 | if (ret < 0) { |
80e8027a JD |
1123 | goto error; |
1124 | } | |
6763619c | 1125 | session_id = be64toh(request.session_id); |
80e8027a JD |
1126 | |
1127 | health_code_update(); | |
1128 | ||
53efb85a MD |
1129 | memset(&response, 0, sizeof(response)); |
1130 | ||
7591bab1 | 1131 | session = session_get_by_id(session_id); |
2f8f53af | 1132 | if (!session) { |
6763619c | 1133 | DBG("Relay session %" PRIu64 " not found", session_id); |
c4e361a4 | 1134 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_ERR); |
80e8027a JD |
1135 | goto send_reply; |
1136 | } | |
1137 | ||
7591bab1 | 1138 | if (!viewer_session_is_attached(conn->viewer_session, session)) { |
c4e361a4 | 1139 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_ERR); |
80e8027a JD |
1140 | goto send_reply; |
1141 | } | |
1142 | ||
c06fdd95 | 1143 | pthread_mutex_lock(&session->lock); |
b66a15d1 | 1144 | ret = make_viewer_streams(session, |
9edaf114 | 1145 | conn->viewer_session, |
b66a15d1 | 1146 | LTTNG_VIEWER_SEEK_LAST, &nb_total, &nb_unsent, |
bddf80e4 | 1147 | &nb_created, &closed); |
2f8f53af | 1148 | if (ret < 0) { |
b66a15d1 | 1149 | goto error_unlock_session; |
2f8f53af | 1150 | } |
3d0bbd40 JG |
1151 | send_streams = 1; |
1152 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_OK); | |
b66a15d1 | 1153 | |
2f8f53af DG |
1154 | /* Only send back the newly created streams with the unsent ones. */ |
1155 | nb_streams = nb_created + nb_unsent; | |
80e8027a JD |
1156 | response.streams_count = htobe32(nb_streams); |
1157 | ||
4479f682 | 1158 | /* |
2229a09c MD |
1159 | * If the session is closed, HUP when there are no more streams |
1160 | * with data. | |
4479f682 | 1161 | */ |
bddf80e4 | 1162 | if (closed && nb_total == 0) { |
4479f682 | 1163 | send_streams = 0; |
bddf80e4 | 1164 | response.streams_count = 0; |
4479f682 | 1165 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_HUP); |
3d0bbd40 | 1166 | goto send_reply_unlock; |
4479f682 | 1167 | } |
3d0bbd40 JG |
1168 | send_reply_unlock: |
1169 | pthread_mutex_unlock(&session->lock); | |
4479f682 | 1170 | |
80e8027a JD |
1171 | send_reply: |
1172 | health_code_update(); | |
58eb9381 | 1173 | ret = send_response(conn->sock, &response, sizeof(response)); |
80e8027a | 1174 | if (ret < 0) { |
7591bab1 | 1175 | goto end_put_session; |
80e8027a JD |
1176 | } |
1177 | health_code_update(); | |
1178 | ||
1179 | /* | |
7591bab1 MD |
1180 | * Unknown or empty session, just return gracefully, the viewer |
1181 | * knows what is happening. | |
80e8027a JD |
1182 | */ |
1183 | if (!send_streams || !nb_streams) { | |
1184 | ret = 0; | |
7591bab1 | 1185 | goto end_put_session; |
80e8027a JD |
1186 | } |
1187 | ||
2f8f53af | 1188 | /* |
7591bab1 MD |
1189 | * Send stream and *DON'T* ignore the sent flag so every viewer |
1190 | * streams that were not sent from that point will be sent to | |
1191 | * the viewer. | |
2f8f53af | 1192 | */ |
c06fdd95 | 1193 | ret = send_viewer_streams(conn->sock, session_id, 0); |
2f8f53af | 1194 | if (ret < 0) { |
7591bab1 | 1195 | goto end_put_session; |
80e8027a JD |
1196 | } |
1197 | ||
7591bab1 MD |
1198 | end_put_session: |
1199 | if (session) { | |
1200 | session_put(session); | |
1201 | } | |
80e8027a JD |
1202 | error: |
1203 | return ret; | |
b66a15d1 JG |
1204 | error_unlock_session: |
1205 | pthread_mutex_unlock(&session->lock); | |
1206 | session_put(session); | |
1207 | return ret; | |
80e8027a JD |
1208 | } |
1209 | ||
d3e2ba59 JD |
1210 | /* |
1211 | * Send the viewer the list of current sessions. | |
1212 | */ | |
1213 | static | |
58eb9381 | 1214 | int viewer_attach_session(struct relay_connection *conn) |
d3e2ba59 | 1215 | { |
2f8f53af DG |
1216 | int send_streams = 0; |
1217 | ssize_t ret; | |
80e8027a | 1218 | uint32_t nb_streams = 0; |
2f8f53af | 1219 | enum lttng_viewer_seek seek_type; |
d3e2ba59 JD |
1220 | struct lttng_viewer_attach_session_request request; |
1221 | struct lttng_viewer_attach_session_response response; | |
7591bab1 | 1222 | struct relay_session *session = NULL; |
dbd6665b | 1223 | enum lttng_viewer_attach_return_code viewer_attach_status; |
bddf80e4 | 1224 | bool closed = false; |
c06fdd95 | 1225 | uint64_t session_id; |
d3e2ba59 | 1226 | |
58eb9381 | 1227 | assert(conn); |
d3e2ba59 | 1228 | |
eea7556c MD |
1229 | health_code_update(); |
1230 | ||
2f8f53af | 1231 | /* Receive the request from the connected client. */ |
58eb9381 | 1232 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 1233 | if (ret < 0) { |
d3e2ba59 JD |
1234 | goto error; |
1235 | } | |
1236 | ||
c06fdd95 | 1237 | session_id = be64toh(request.session_id); |
eea7556c MD |
1238 | health_code_update(); |
1239 | ||
53efb85a MD |
1240 | memset(&response, 0, sizeof(response)); |
1241 | ||
c3b7390b JD |
1242 | if (!conn->viewer_session) { |
1243 | DBG("Client trying to attach before creating a live viewer session"); | |
1244 | response.status = htobe32(LTTNG_VIEWER_ATTACH_NO_SESSION); | |
1245 | goto send_reply; | |
1246 | } | |
1247 | ||
c06fdd95 | 1248 | session = session_get_by_id(session_id); |
2f8f53af | 1249 | if (!session) { |
c06fdd95 | 1250 | DBG("Relay session %" PRIu64 " not found", session_id); |
c4e361a4 | 1251 | response.status = htobe32(LTTNG_VIEWER_ATTACH_UNK); |
d3e2ba59 JD |
1252 | goto send_reply; |
1253 | } | |
c06fdd95 | 1254 | DBG("Attach session ID %" PRIu64 " received", session_id); |
d3e2ba59 | 1255 | |
c06fdd95 | 1256 | pthread_mutex_lock(&session->lock); |
79a42980 JG |
1257 | if (!session->current_trace_chunk) { |
1258 | /* | |
1259 | * Session is either being destroyed or it never had a trace | |
1260 | * chunk created against it. | |
1261 | */ | |
1262 | DBG("Session requested by live client has no current trace chunk, returning unknown session"); | |
1263 | response.status = htobe32(LTTNG_VIEWER_ATTACH_UNK); | |
1264 | goto send_reply; | |
1265 | } | |
7591bab1 | 1266 | if (session->live_timer == 0) { |
d3e2ba59 | 1267 | DBG("Not live session"); |
c4e361a4 | 1268 | response.status = htobe32(LTTNG_VIEWER_ATTACH_NOT_LIVE); |
d3e2ba59 | 1269 | goto send_reply; |
7591bab1 MD |
1270 | } |
1271 | ||
1272 | send_streams = 1; | |
dbd6665b JG |
1273 | viewer_attach_status = viewer_session_attach(conn->viewer_session, |
1274 | session); | |
1275 | if (viewer_attach_status != LTTNG_VIEWER_ATTACH_OK) { | |
1276 | response.status = htobe32(viewer_attach_status); | |
7591bab1 | 1277 | goto send_reply; |
d3e2ba59 JD |
1278 | } |
1279 | ||
1280 | switch (be32toh(request.seek)) { | |
c4e361a4 JD |
1281 | case LTTNG_VIEWER_SEEK_BEGINNING: |
1282 | case LTTNG_VIEWER_SEEK_LAST: | |
7591bab1 | 1283 | response.status = htobe32(LTTNG_VIEWER_ATTACH_OK); |
2f8f53af | 1284 | seek_type = be32toh(request.seek); |
d3e2ba59 JD |
1285 | break; |
1286 | default: | |
1287 | ERR("Wrong seek parameter"); | |
c4e361a4 | 1288 | response.status = htobe32(LTTNG_VIEWER_ATTACH_SEEK_ERR); |
d3e2ba59 JD |
1289 | send_streams = 0; |
1290 | goto send_reply; | |
1291 | } | |
1292 | ||
b66a15d1 | 1293 | ret = make_viewer_streams(session, |
9edaf114 | 1294 | conn->viewer_session, seek_type, |
b66a15d1 | 1295 | &nb_streams, NULL, NULL, &closed); |
2f8f53af | 1296 | if (ret < 0) { |
7591bab1 | 1297 | goto end_put_session; |
d3e2ba59 | 1298 | } |
c06fdd95 JG |
1299 | pthread_mutex_unlock(&session->lock); |
1300 | session_put(session); | |
1301 | session = NULL; | |
1302 | ||
1303 | response.streams_count = htobe32(nb_streams); | |
bddf80e4 MD |
1304 | /* |
1305 | * If the session is closed when the viewer is attaching, it | |
1306 | * means some of the streams may have been concurrently removed, | |
1307 | * so we don't allow the viewer to attach, even if there are | |
1308 | * streams available. | |
1309 | */ | |
1310 | if (closed) { | |
1311 | send_streams = 0; | |
1312 | response.streams_count = 0; | |
06079f15 | 1313 | response.status = htobe32(LTTNG_VIEWER_ATTACH_UNK); |
bddf80e4 MD |
1314 | goto send_reply; |
1315 | } | |
1316 | ||
d3e2ba59 | 1317 | send_reply: |
eea7556c | 1318 | health_code_update(); |
58eb9381 | 1319 | ret = send_response(conn->sock, &response, sizeof(response)); |
d3e2ba59 | 1320 | if (ret < 0) { |
7591bab1 | 1321 | goto end_put_session; |
d3e2ba59 | 1322 | } |
eea7556c | 1323 | health_code_update(); |
d3e2ba59 JD |
1324 | |
1325 | /* | |
7591bab1 MD |
1326 | * Unknown or empty session, just return gracefully, the viewer |
1327 | * knows what is happening. | |
d3e2ba59 | 1328 | */ |
157df586 | 1329 | if (!send_streams || !nb_streams) { |
d3e2ba59 | 1330 | ret = 0; |
7591bab1 | 1331 | goto end_put_session; |
d3e2ba59 JD |
1332 | } |
1333 | ||
2f8f53af | 1334 | /* Send stream and ignore the sent flag. */ |
c06fdd95 | 1335 | ret = send_viewer_streams(conn->sock, session_id, 1); |
2f8f53af | 1336 | if (ret < 0) { |
7591bab1 | 1337 | goto end_put_session; |
d3e2ba59 | 1338 | } |
d3e2ba59 | 1339 | |
7591bab1 MD |
1340 | end_put_session: |
1341 | if (session) { | |
c06fdd95 | 1342 | pthread_mutex_unlock(&session->lock); |
7591bab1 MD |
1343 | session_put(session); |
1344 | } | |
4a9daf17 JD |
1345 | error: |
1346 | return ret; | |
1347 | } | |
1348 | ||
878c34cf DG |
1349 | /* |
1350 | * Open the index file if needed for the given vstream. | |
1351 | * | |
f8f3885c MD |
1352 | * If an index file is successfully opened, the vstream will set it as its |
1353 | * current index file. | |
878c34cf DG |
1354 | * |
1355 | * Return 0 on success, a negative value on error (-ENOENT if not ready yet). | |
7591bab1 MD |
1356 | * |
1357 | * Called with rstream lock held. | |
878c34cf DG |
1358 | */ |
1359 | static int try_open_index(struct relay_viewer_stream *vstream, | |
1360 | struct relay_stream *rstream) | |
1361 | { | |
1362 | int ret = 0; | |
ebb29c10 JG |
1363 | const uint32_t connection_major = rstream->trace->session->major; |
1364 | const uint32_t connection_minor = rstream->trace->session->minor; | |
3ff5c5db | 1365 | enum lttng_trace_chunk_status chunk_status; |
878c34cf | 1366 | |
f8f3885c | 1367 | if (vstream->index_file) { |
878c34cf DG |
1368 | goto end; |
1369 | } | |
1370 | ||
1371 | /* | |
7591bab1 | 1372 | * First time, we open the index file and at least one index is ready. |
878c34cf | 1373 | */ |
a44ca2ca | 1374 | if (rstream->index_received_seqcount == 0) { |
878c34cf DG |
1375 | ret = -ENOENT; |
1376 | goto end; | |
1377 | } | |
3ff5c5db | 1378 | chunk_status = lttng_index_file_create_from_trace_chunk_read_only( |
b66a15d1 | 1379 | vstream->stream_file.trace_chunk, rstream->path_name, |
ebb29c10 JG |
1380 | rstream->channel_name, rstream->tracefile_size, |
1381 | vstream->current_tracefile_id, | |
1382 | lttng_to_index_major(connection_major, connection_minor), | |
3ff5c5db MD |
1383 | lttng_to_index_minor(connection_major, connection_minor), |
1384 | true, &vstream->index_file); | |
1385 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
1386 | if (chunk_status == LTTNG_TRACE_CHUNK_STATUS_NO_FILE) { | |
1387 | ret = -ENOENT; | |
1388 | } else { | |
1389 | ret = -1; | |
1390 | } | |
878c34cf DG |
1391 | } |
1392 | ||
1393 | end: | |
1394 | return ret; | |
1395 | } | |
1396 | ||
1397 | /* | |
7591bab1 MD |
1398 | * Check the status of the index for the given stream. This function |
1399 | * updates the index structure if needed and can put (close) the vstream | |
1400 | * in the HUP situation. | |
1401 | * | |
1402 | * Return 0 means that we can proceed with the index. A value of 1 means | |
1403 | * that the index has been updated and is ready to be sent to the | |
1404 | * client. A negative value indicates an error that can't be handled. | |
878c34cf | 1405 | * |
7591bab1 | 1406 | * Called with rstream lock held. |
878c34cf DG |
1407 | */ |
1408 | static int check_index_status(struct relay_viewer_stream *vstream, | |
1409 | struct relay_stream *rstream, struct ctf_trace *trace, | |
1410 | struct lttng_viewer_index *index) | |
1411 | { | |
1412 | int ret; | |
1413 | ||
68c40154 MD |
1414 | DBG("Check index status: index_received_seqcount %" PRIu64 " " |
1415 | "index_sent_seqcount %" PRIu64 " " | |
1416 | "for stream %" PRIu64, | |
1417 | rstream->index_received_seqcount, | |
1418 | vstream->index_sent_seqcount, | |
1419 | vstream->stream->stream_handle); | |
797bc362 | 1420 | if ((trace->session->connection_closed || rstream->closed) |
a44ca2ca MD |
1421 | && rstream->index_received_seqcount |
1422 | == vstream->index_sent_seqcount) { | |
797bc362 MD |
1423 | /* |
1424 | * Last index sent and session connection or relay | |
1425 | * stream are closed. | |
1426 | */ | |
7591bab1 MD |
1427 | index->status = htobe32(LTTNG_VIEWER_INDEX_HUP); |
1428 | goto hup; | |
1429 | } else if (rstream->beacon_ts_end != -1ULL && | |
b0d240a2 MD |
1430 | (rstream->index_received_seqcount == 0 || |
1431 | (vstream->index_sent_seqcount != 0 && | |
a44ca2ca | 1432 | rstream->index_received_seqcount |
b0d240a2 | 1433 | <= vstream->index_sent_seqcount))) { |
7591bab1 MD |
1434 | /* |
1435 | * We've received a synchronization beacon and the last index | |
1436 | * available has been sent, the index for now is inactive. | |
1437 | * | |
1438 | * In this case, we have received a beacon which allows us to | |
1439 | * inform the client of a time interval during which we can | |
1440 | * guarantee that there are no events to read (and never will | |
1441 | * be). | |
b0d240a2 MD |
1442 | * |
1443 | * The sent seqcount can grow higher than receive seqcount on | |
1444 | * clear because the rotation performed by clear will push | |
1445 | * the index_sent_seqcount ahead (see | |
1446 | * viewer_stream_sync_tracefile_array_tail) and skip over | |
1447 | * packet sequence numbers. | |
7591bab1 MD |
1448 | */ |
1449 | index->status = htobe32(LTTNG_VIEWER_INDEX_INACTIVE); | |
1450 | index->timestamp_end = htobe64(rstream->beacon_ts_end); | |
1451 | index->stream_id = htobe64(rstream->ctf_stream_id); | |
68c40154 MD |
1452 | DBG("Check index status: inactive with beacon, for stream %" PRIu64, |
1453 | vstream->stream->stream_handle); | |
7591bab1 | 1454 | goto index_ready; |
b0d240a2 MD |
1455 | } else if (rstream->index_received_seqcount == 0 || |
1456 | (vstream->index_sent_seqcount != 0 && | |
1457 | rstream->index_received_seqcount | |
1458 | <= vstream->index_sent_seqcount)) { | |
7591bab1 | 1459 | /* |
b0d240a2 | 1460 | * This checks whether received <= sent seqcount. In |
a44ca2ca MD |
1461 | * this case, we have not received a beacon. Therefore, |
1462 | * we can only ask the client to retry later. | |
b0d240a2 MD |
1463 | * |
1464 | * The sent seqcount can grow higher than receive seqcount on | |
1465 | * clear because the rotation performed by clear will push | |
1466 | * the index_sent_seqcount ahead (see | |
1467 | * viewer_stream_sync_tracefile_array_tail) and skip over | |
1468 | * packet sequence numbers. | |
7591bab1 MD |
1469 | */ |
1470 | index->status = htobe32(LTTNG_VIEWER_INDEX_RETRY); | |
68c40154 MD |
1471 | DBG("Check index status: retry for stream %" PRIu64, |
1472 | vstream->stream->stream_handle); | |
7591bab1 | 1473 | goto index_ready; |
a44ca2ca MD |
1474 | } else if (!tracefile_array_seq_in_file(rstream->tfa, |
1475 | vstream->current_tracefile_id, | |
1476 | vstream->index_sent_seqcount)) { | |
7591bab1 | 1477 | /* |
a44ca2ca MD |
1478 | * The next index we want to send cannot be read either |
1479 | * because we need to perform a rotation, or due to | |
1480 | * the producer having overwritten its trace file. | |
7591bab1 | 1481 | */ |
a44ca2ca | 1482 | DBG("Viewer stream %" PRIu64 " rotation", |
7591bab1 MD |
1483 | vstream->stream->stream_handle); |
1484 | ret = viewer_stream_rotate(vstream); | |
b0d240a2 | 1485 | if (ret == 1) { |
7591bab1 MD |
1486 | /* EOF across entire stream. */ |
1487 | index->status = htobe32(LTTNG_VIEWER_INDEX_HUP); | |
1488 | goto hup; | |
1489 | } | |
7591bab1 | 1490 | /* |
a44ca2ca MD |
1491 | * If we have been pushed due to overwrite, it |
1492 | * necessarily means there is data that can be read in | |
1493 | * the stream. If we rotated because we reached the end | |
1494 | * of a tracefile, it means the following tracefile | |
1495 | * needs to contain at least one index, else we would | |
1496 | * have already returned LTTNG_VIEWER_INDEX_RETRY to the | |
1497 | * viewer. The updated index_sent_seqcount needs to | |
1498 | * point to a readable index entry now. | |
1499 | * | |
1500 | * In the case where we "rotate" on a single file, we | |
1501 | * can end up in a case where the requested index is | |
1502 | * still unavailable. | |
7591bab1 | 1503 | */ |
a44ca2ca MD |
1504 | if (rstream->tracefile_count == 1 && |
1505 | !tracefile_array_seq_in_file( | |
1506 | rstream->tfa, | |
1507 | vstream->current_tracefile_id, | |
1508 | vstream->index_sent_seqcount)) { | |
1509 | index->status = htobe32(LTTNG_VIEWER_INDEX_RETRY); | |
68c40154 MD |
1510 | DBG("Check index status: retry: " |
1511 | "tracefile array sequence number %" PRIu64 | |
1512 | " not in file for stream %" PRIu64, | |
1513 | vstream->index_sent_seqcount, | |
1514 | vstream->stream->stream_handle); | |
a44ca2ca | 1515 | goto index_ready; |
878c34cf | 1516 | } |
a44ca2ca MD |
1517 | assert(tracefile_array_seq_in_file(rstream->tfa, |
1518 | vstream->current_tracefile_id, | |
1519 | vstream->index_sent_seqcount)); | |
878c34cf | 1520 | } |
a44ca2ca MD |
1521 | /* ret == 0 means successful so we continue. */ |
1522 | ret = 0; | |
878c34cf DG |
1523 | return ret; |
1524 | ||
1525 | hup: | |
7591bab1 | 1526 | viewer_stream_put(vstream); |
878c34cf DG |
1527 | index_ready: |
1528 | return 1; | |
1529 | } | |
1530 | ||
d3e2ba59 JD |
1531 | /* |
1532 | * Send the next index for a stream. | |
1533 | * | |
1534 | * Return 0 on success or else a negative value. | |
1535 | */ | |
1536 | static | |
58eb9381 | 1537 | int viewer_get_next_index(struct relay_connection *conn) |
d3e2ba59 JD |
1538 | { |
1539 | int ret; | |
1540 | struct lttng_viewer_get_next_index request_index; | |
1541 | struct lttng_viewer_index viewer_index; | |
50adc264 | 1542 | struct ctf_packet_index packet_index; |
7591bab1 MD |
1543 | struct relay_viewer_stream *vstream = NULL; |
1544 | struct relay_stream *rstream = NULL; | |
1545 | struct ctf_trace *ctf_trace = NULL; | |
1546 | struct relay_viewer_stream *metadata_viewer_stream = NULL; | |
d3e2ba59 | 1547 | |
58eb9381 | 1548 | assert(conn); |
d3e2ba59 JD |
1549 | |
1550 | DBG("Viewer get next index"); | |
1551 | ||
7591bab1 | 1552 | memset(&viewer_index, 0, sizeof(viewer_index)); |
eea7556c | 1553 | health_code_update(); |
2f8f53af | 1554 | |
58eb9381 | 1555 | ret = recv_request(conn->sock, &request_index, sizeof(request_index)); |
2f8f53af | 1556 | if (ret < 0) { |
d3e2ba59 JD |
1557 | goto end; |
1558 | } | |
eea7556c | 1559 | health_code_update(); |
d3e2ba59 | 1560 | |
7591bab1 | 1561 | vstream = viewer_stream_get_by_id(be64toh(request_index.stream_id)); |
6763619c | 1562 | if (!vstream) { |
a44ca2ca | 1563 | DBG("Client requested index of unknown stream id %" PRIu64, |
9b9f9f94 | 1564 | (uint64_t) be64toh(request_index.stream_id)); |
f1883937 MD |
1565 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
1566 | goto send_reply; | |
2a174661 DG |
1567 | } |
1568 | ||
7591bab1 MD |
1569 | /* Use back. ref. Protected by refcounts. */ |
1570 | rstream = vstream->stream; | |
1571 | ctf_trace = rstream->trace; | |
d3e2ba59 | 1572 | |
7591bab1 MD |
1573 | /* metadata_viewer_stream may be NULL. */ |
1574 | metadata_viewer_stream = | |
1575 | ctf_trace_get_viewer_metadata_stream(ctf_trace); | |
2a174661 | 1576 | |
7591bab1 | 1577 | pthread_mutex_lock(&rstream->lock); |
d3e2ba59 JD |
1578 | |
1579 | /* | |
1580 | * The viewer should not ask for index on metadata stream. | |
1581 | */ | |
7591bab1 | 1582 | if (rstream->is_metadata) { |
c4e361a4 | 1583 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_HUP); |
d3e2ba59 JD |
1584 | goto send_reply; |
1585 | } | |
1586 | ||
b0d240a2 MD |
1587 | if (rstream->ongoing_rotation.is_set) { |
1588 | /* Rotation is ongoing, try again later. */ | |
1589 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_RETRY); | |
1590 | goto send_reply; | |
1591 | } | |
1592 | ||
1593 | if (rstream->trace->session->ongoing_rotation) { | |
1594 | /* Rotation is ongoing, try again later. */ | |
1595 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_RETRY); | |
1596 | goto send_reply; | |
1597 | } | |
1598 | ||
ad8bec24 JG |
1599 | if (rstream->trace_chunk && !lttng_trace_chunk_ids_equal( |
1600 | conn->viewer_session->current_trace_chunk, | |
1601 | rstream->trace_chunk)) { | |
9a9c8637 | 1602 | DBG("Relay stream and viewer chunk ids differ"); |
b0d240a2 | 1603 | |
ad8bec24 JG |
1604 | ret = viewer_session_set_trace_chunk_copy( |
1605 | conn->viewer_session, | |
1606 | rstream->trace_chunk); | |
1607 | if (ret) { | |
b0d240a2 MD |
1608 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
1609 | goto send_reply; | |
1610 | } | |
b0d240a2 MD |
1611 | } |
1612 | if (conn->viewer_session->current_trace_chunk != | |
1613 | vstream->stream_file.trace_chunk) { | |
1614 | bool acquired_reference; | |
1615 | ||
1616 | DBG("Viewer session and viewer stream chunk differ: " | |
1617 | "vsession chunk %p vstream chunk %p", | |
1618 | conn->viewer_session->current_trace_chunk, | |
1619 | vstream->stream_file.trace_chunk); | |
1620 | lttng_trace_chunk_put(vstream->stream_file.trace_chunk); | |
1621 | acquired_reference = lttng_trace_chunk_get(conn->viewer_session->current_trace_chunk); | |
1622 | assert(acquired_reference); | |
1623 | vstream->stream_file.trace_chunk = | |
1624 | conn->viewer_session->current_trace_chunk; | |
1625 | viewer_stream_sync_tracefile_array_tail(vstream); | |
1626 | viewer_stream_close_files(vstream); | |
d3e2ba59 JD |
1627 | } |
1628 | ||
878c34cf | 1629 | ret = check_index_status(vstream, rstream, ctf_trace, &viewer_index); |
878c34cf | 1630 | if (ret < 0) { |
7591bab1 | 1631 | goto error_put; |
878c34cf DG |
1632 | } else if (ret == 1) { |
1633 | /* | |
7591bab1 MD |
1634 | * We have no index to send and check_index_status has populated |
1635 | * viewer_index's status. | |
878c34cf | 1636 | */ |
d3e2ba59 JD |
1637 | goto send_reply; |
1638 | } | |
7591bab1 | 1639 | /* At this point, ret is 0 thus we will be able to read the index. */ |
878c34cf | 1640 | assert(!ret); |
d3e2ba59 | 1641 | |
b0d240a2 MD |
1642 | /* Try to open an index if one is needed for that stream. */ |
1643 | ret = try_open_index(vstream, rstream); | |
1644 | if (ret == -ENOENT) { | |
1645 | if (rstream->closed) { | |
1646 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_HUP); | |
1647 | goto send_reply; | |
1648 | } else { | |
1649 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_RETRY); | |
1650 | goto send_reply; | |
1651 | } | |
1652 | } | |
1653 | if (ret < 0) { | |
1654 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); | |
1655 | goto send_reply; | |
1656 | } | |
1657 | ||
7591bab1 MD |
1658 | /* |
1659 | * vstream->stream_fd may be NULL if it has been closed by | |
1660 | * tracefile rotation, or if we are at the beginning of the | |
1661 | * stream. We open the data stream file here to protect against | |
1662 | * overwrite caused by tracefile rotation (in association with | |
1663 | * unlink performed before overwrite). | |
1664 | */ | |
8bb66c3c | 1665 | if (!vstream->stream_file.handle) { |
ebb29c10 JG |
1666 | char file_path[LTTNG_PATH_MAX]; |
1667 | enum lttng_trace_chunk_status status; | |
8bb66c3c | 1668 | struct fs_handle *fs_handle; |
ebb29c10 JG |
1669 | |
1670 | ret = utils_stream_file_path(rstream->path_name, | |
1671 | rstream->channel_name, rstream->tracefile_size, | |
1672 | vstream->current_tracefile_id, NULL, file_path, | |
1673 | sizeof(file_path)); | |
7591bab1 MD |
1674 | if (ret < 0) { |
1675 | goto error_put; | |
1676 | } | |
ebb29c10 | 1677 | |
3ff5c5db MD |
1678 | /* |
1679 | * It is possible the the file we are trying to open is | |
1680 | * missing if the stream has been closed (application exits with | |
1681 | * per-pid buffers) and a clear command has been performed. | |
1682 | */ | |
8bb66c3c | 1683 | status = lttng_trace_chunk_open_fs_handle( |
ebb29c10 | 1684 | vstream->stream_file.trace_chunk, |
8bb66c3c | 1685 | file_path, O_RDONLY, 0, &fs_handle, true); |
ebb29c10 | 1686 | if (status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
b0d240a2 MD |
1687 | if (status == LTTNG_TRACE_CHUNK_STATUS_NO_FILE && |
1688 | rstream->closed) { | |
1689 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_HUP); | |
1690 | goto send_reply; | |
1691 | } | |
ebb29c10 | 1692 | PERROR("Failed to open trace file for viewer stream"); |
7591bab1 MD |
1693 | goto error_put; |
1694 | } | |
8bb66c3c | 1695 | vstream->stream_file.handle = fs_handle; |
d3e2ba59 JD |
1696 | } |
1697 | ||
f04a971b | 1698 | ret = check_new_streams(conn); |
4a9daf17 | 1699 | if (ret < 0) { |
7591bab1 MD |
1700 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
1701 | goto send_reply; | |
4a9daf17 JD |
1702 | } else if (ret == 1) { |
1703 | viewer_index.flags |= LTTNG_VIEWER_FLAG_NEW_STREAM; | |
1704 | } | |
1705 | ||
f8f3885c MD |
1706 | ret = lttng_index_file_read(vstream->index_file, &packet_index); |
1707 | if (ret) { | |
8bb66c3c | 1708 | ERR("Relay error reading index file"); |
7591bab1 | 1709 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
6b6b9a5a | 1710 | goto send_reply; |
d3e2ba59 | 1711 | } else { |
c4e361a4 | 1712 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_OK); |
a44ca2ca | 1713 | vstream->index_sent_seqcount++; |
d3e2ba59 JD |
1714 | } |
1715 | ||
1716 | /* | |
1717 | * Indexes are stored in big endian, no need to switch before sending. | |
1718 | */ | |
7591bab1 MD |
1719 | DBG("Sending viewer index for stream %" PRIu64 " offset %" PRIu64, |
1720 | rstream->stream_handle, | |
9b9f9f94 | 1721 | (uint64_t) be64toh(packet_index.offset)); |
d3e2ba59 JD |
1722 | viewer_index.offset = packet_index.offset; |
1723 | viewer_index.packet_size = packet_index.packet_size; | |
1724 | viewer_index.content_size = packet_index.content_size; | |
1725 | viewer_index.timestamp_begin = packet_index.timestamp_begin; | |
1726 | viewer_index.timestamp_end = packet_index.timestamp_end; | |
1727 | viewer_index.events_discarded = packet_index.events_discarded; | |
1728 | viewer_index.stream_id = packet_index.stream_id; | |
1729 | ||
1730 | send_reply: | |
f1883937 MD |
1731 | if (rstream) { |
1732 | pthread_mutex_unlock(&rstream->lock); | |
1733 | } | |
7591bab1 MD |
1734 | |
1735 | if (metadata_viewer_stream) { | |
1736 | pthread_mutex_lock(&metadata_viewer_stream->stream->lock); | |
1737 | DBG("get next index metadata check: recv %" PRIu64 | |
1738 | " sent %" PRIu64, | |
1739 | metadata_viewer_stream->stream->metadata_received, | |
1740 | metadata_viewer_stream->metadata_sent); | |
1741 | if (!metadata_viewer_stream->stream->metadata_received || | |
1742 | metadata_viewer_stream->stream->metadata_received > | |
1743 | metadata_viewer_stream->metadata_sent) { | |
1744 | viewer_index.flags |= LTTNG_VIEWER_FLAG_NEW_METADATA; | |
1745 | } | |
1746 | pthread_mutex_unlock(&metadata_viewer_stream->stream->lock); | |
1747 | } | |
1748 | ||
d3e2ba59 | 1749 | viewer_index.flags = htobe32(viewer_index.flags); |
eea7556c | 1750 | health_code_update(); |
2f8f53af | 1751 | |
58eb9381 | 1752 | ret = send_response(conn->sock, &viewer_index, sizeof(viewer_index)); |
d3e2ba59 | 1753 | if (ret < 0) { |
7591bab1 | 1754 | goto end; |
d3e2ba59 | 1755 | } |
eea7556c | 1756 | health_code_update(); |
d3e2ba59 | 1757 | |
9237e6a1 MD |
1758 | if (vstream) { |
1759 | DBG("Index %" PRIu64 " for stream %" PRIu64 " sent", | |
a44ca2ca | 1760 | vstream->index_sent_seqcount, |
9237e6a1 MD |
1761 | vstream->stream->stream_handle); |
1762 | } | |
d3e2ba59 | 1763 | end: |
7591bab1 MD |
1764 | if (metadata_viewer_stream) { |
1765 | viewer_stream_put(metadata_viewer_stream); | |
1766 | } | |
1767 | if (vstream) { | |
1768 | viewer_stream_put(vstream); | |
1769 | } | |
1770 | return ret; | |
1771 | ||
1772 | error_put: | |
1773 | pthread_mutex_unlock(&rstream->lock); | |
1774 | if (metadata_viewer_stream) { | |
1775 | viewer_stream_put(metadata_viewer_stream); | |
1776 | } | |
1777 | viewer_stream_put(vstream); | |
d3e2ba59 JD |
1778 | return ret; |
1779 | } | |
1780 | ||
1781 | /* | |
1782 | * Send the next index for a stream | |
1783 | * | |
1784 | * Return 0 on success or else a negative value. | |
1785 | */ | |
1786 | static | |
58eb9381 | 1787 | int viewer_get_packet(struct relay_connection *conn) |
d3e2ba59 | 1788 | { |
b6025e94 | 1789 | int ret; |
a5df8828 | 1790 | off_t lseek_ret; |
553b2adb | 1791 | char *reply = NULL; |
d3e2ba59 | 1792 | struct lttng_viewer_get_packet get_packet_info; |
553b2adb | 1793 | struct lttng_viewer_trace_packet reply_header; |
7591bab1 | 1794 | struct relay_viewer_stream *vstream = NULL; |
553b2adb | 1795 | uint32_t reply_size = sizeof(reply_header); |
b6025e94 JR |
1796 | uint32_t packet_data_len = 0; |
1797 | ssize_t read_len; | |
8bb66c3c | 1798 | uint64_t stream_id; |
d3e2ba59 JD |
1799 | |
1800 | DBG2("Relay get data packet"); | |
1801 | ||
eea7556c | 1802 | health_code_update(); |
2f8f53af | 1803 | |
7591bab1 MD |
1804 | ret = recv_request(conn->sock, &get_packet_info, |
1805 | sizeof(get_packet_info)); | |
2f8f53af | 1806 | if (ret < 0) { |
d3e2ba59 JD |
1807 | goto end; |
1808 | } | |
eea7556c | 1809 | health_code_update(); |
d3e2ba59 | 1810 | |
0233a6a5 | 1811 | /* From this point on, the error label can be reached. */ |
553b2adb | 1812 | memset(&reply_header, 0, sizeof(reply_header)); |
8bb66c3c | 1813 | stream_id = (uint64_t) be64toh(get_packet_info.stream_id); |
0233a6a5 | 1814 | |
8bb66c3c | 1815 | vstream = viewer_stream_get_by_id(stream_id); |
7591bab1 | 1816 | if (!vstream) { |
a44ca2ca | 1817 | DBG("Client requested packet of unknown stream id %" PRIu64, |
8bb66c3c | 1818 | stream_id); |
553b2adb JG |
1819 | reply_header.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); |
1820 | goto send_reply_nolock; | |
b6025e94 JR |
1821 | } else { |
1822 | packet_data_len = be32toh(get_packet_info.len); | |
553b2adb | 1823 | reply_size += packet_data_len; |
d3e2ba59 | 1824 | } |
2a174661 | 1825 | |
553b2adb JG |
1826 | reply = zmalloc(reply_size); |
1827 | if (!reply) { | |
1828 | PERROR("packet reply zmalloc"); | |
1829 | reply_size = sizeof(reply_header); | |
d3e2ba59 JD |
1830 | goto error; |
1831 | } | |
1832 | ||
b6025e94 | 1833 | pthread_mutex_lock(&vstream->stream->lock); |
8bb66c3c | 1834 | lseek_ret = fs_handle_seek(vstream->stream_file.handle, |
ebb29c10 | 1835 | be64toh(get_packet_info.offset), SEEK_SET); |
a5df8828 | 1836 | if (lseek_ret < 0) { |
8bb66c3c JG |
1837 | PERROR("Failed to seek file system handle of viewer stream %" PRIu64 |
1838 | " to offset %" PRIu64, | |
1839 | stream_id, | |
ebb29c10 | 1840 | (uint64_t) be64toh(get_packet_info.offset)); |
7591bab1 | 1841 | goto error; |
d3e2ba59 | 1842 | } |
8bb66c3c | 1843 | read_len = fs_handle_read(vstream->stream_file.handle, |
ebb29c10 | 1844 | reply + sizeof(reply_header), packet_data_len); |
b6025e94 | 1845 | if (read_len < packet_data_len) { |
8bb66c3c JG |
1846 | PERROR("Failed to read from file system handle of viewer stream id %" PRIu64 |
1847 | ", offset: %" PRIu64, | |
1848 | stream_id, | |
9b9f9f94 | 1849 | (uint64_t) be64toh(get_packet_info.offset)); |
7591bab1 | 1850 | goto error; |
d3e2ba59 | 1851 | } |
553b2adb JG |
1852 | reply_header.status = htobe32(LTTNG_VIEWER_GET_PACKET_OK); |
1853 | reply_header.len = htobe32(packet_data_len); | |
d3e2ba59 JD |
1854 | goto send_reply; |
1855 | ||
1856 | error: | |
553b2adb | 1857 | reply_header.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); |
d3e2ba59 JD |
1858 | |
1859 | send_reply: | |
7591bab1 MD |
1860 | if (vstream) { |
1861 | pthread_mutex_unlock(&vstream->stream->lock); | |
1862 | } | |
1863 | send_reply_nolock: | |
eea7556c MD |
1864 | |
1865 | health_code_update(); | |
2f8f53af | 1866 | |
553b2adb JG |
1867 | if (reply) { |
1868 | memcpy(reply, &reply_header, sizeof(reply_header)); | |
1869 | ret = send_response(conn->sock, reply, reply_size); | |
1870 | } else { | |
1871 | /* No reply to send. */ | |
1872 | ret = send_response(conn->sock, &reply_header, | |
1873 | reply_size); | |
1874 | } | |
1875 | ||
b6025e94 | 1876 | health_code_update(); |
d3e2ba59 | 1877 | if (ret < 0) { |
b6025e94 | 1878 | PERROR("sendmsg of packet data failed"); |
7591bab1 | 1879 | goto end_free; |
d3e2ba59 | 1880 | } |
d3e2ba59 | 1881 | |
8bb66c3c | 1882 | DBG("Sent %u bytes for stream %" PRIu64, reply_size, stream_id); |
d3e2ba59 | 1883 | |
7591bab1 | 1884 | end_free: |
553b2adb | 1885 | free(reply); |
d3e2ba59 | 1886 | end: |
7591bab1 MD |
1887 | if (vstream) { |
1888 | viewer_stream_put(vstream); | |
1889 | } | |
d3e2ba59 JD |
1890 | return ret; |
1891 | } | |
1892 | ||
1893 | /* | |
1894 | * Send the session's metadata | |
1895 | * | |
1896 | * Return 0 on success else a negative value. | |
1897 | */ | |
1898 | static | |
58eb9381 | 1899 | int viewer_get_metadata(struct relay_connection *conn) |
d3e2ba59 JD |
1900 | { |
1901 | int ret = 0; | |
8bb66c3c | 1902 | int fd = -1; |
d3e2ba59 JD |
1903 | ssize_t read_len; |
1904 | uint64_t len = 0; | |
1905 | char *data = NULL; | |
1906 | struct lttng_viewer_get_metadata request; | |
1907 | struct lttng_viewer_metadata_packet reply; | |
7591bab1 | 1908 | struct relay_viewer_stream *vstream = NULL; |
d3e2ba59 | 1909 | |
58eb9381 | 1910 | assert(conn); |
d3e2ba59 JD |
1911 | |
1912 | DBG("Relay get metadata"); | |
1913 | ||
eea7556c | 1914 | health_code_update(); |
2f8f53af | 1915 | |
58eb9381 | 1916 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 1917 | if (ret < 0) { |
d3e2ba59 JD |
1918 | goto end; |
1919 | } | |
eea7556c | 1920 | health_code_update(); |
d3e2ba59 | 1921 | |
53efb85a MD |
1922 | memset(&reply, 0, sizeof(reply)); |
1923 | ||
7591bab1 MD |
1924 | vstream = viewer_stream_get_by_id(be64toh(request.stream_id)); |
1925 | if (!vstream) { | |
3b463131 MD |
1926 | /* |
1927 | * The metadata stream can be closed by a CLOSE command | |
1928 | * just before we attach. It can also be closed by | |
1929 | * per-pid tracing during tracing. Therefore, it is | |
1930 | * possible that we cannot find this viewer stream. | |
1931 | * Reply back to the client with an error if we cannot | |
1932 | * find it. | |
1933 | */ | |
a44ca2ca | 1934 | DBG("Client requested metadata of unknown stream id %" PRIu64, |
9b9f9f94 | 1935 | (uint64_t) be64toh(request.stream_id)); |
3b463131 | 1936 | reply.status = htobe32(LTTNG_VIEWER_METADATA_ERR); |
7591bab1 | 1937 | goto send_reply; |
d3e2ba59 | 1938 | } |
7591bab1 MD |
1939 | pthread_mutex_lock(&vstream->stream->lock); |
1940 | if (!vstream->stream->is_metadata) { | |
1941 | ERR("Invalid metadata stream"); | |
6763619c JD |
1942 | goto error; |
1943 | } | |
1944 | ||
b0d240a2 | 1945 | if (vstream->metadata_sent >= vstream->stream->metadata_received) { |
94f73d08 MD |
1946 | /* |
1947 | * The live viewers expect to receive a NO_NEW_METADATA | |
1948 | * status before a stream disappears, otherwise they abort the | |
1949 | * entire live connection when receiving an error status. | |
b0d240a2 MD |
1950 | * |
1951 | * Clear feature resets the metadata_sent to 0 until the | |
1952 | * same metadata is received again. | |
94f73d08 | 1953 | */ |
c4e361a4 | 1954 | reply.status = htobe32(LTTNG_VIEWER_NO_NEW_METADATA); |
94f73d08 MD |
1955 | /* |
1956 | * The live viewer considers a closed 0 byte metadata stream as | |
1957 | * an error. | |
1958 | */ | |
1959 | if (vstream->metadata_sent > 0) { | |
1960 | vstream->stream->no_new_metadata_notified = true; | |
1961 | if (vstream->stream->closed) { | |
1962 | /* Release ownership for the viewer metadata stream. */ | |
1963 | viewer_stream_put(vstream); | |
1964 | } | |
1965 | } | |
d3e2ba59 JD |
1966 | goto send_reply; |
1967 | } | |
1968 | ||
ad8bec24 JG |
1969 | if (vstream->stream->trace_chunk && |
1970 | !lttng_trace_chunk_ids_equal( | |
1971 | conn->viewer_session->current_trace_chunk, | |
1972 | vstream->stream->trace_chunk)) { | |
1973 | /* A rotation has occurred on the relay stream. */ | |
1974 | DBG("Metadata relay stream and viewer chunk ids differ"); | |
1975 | ||
1976 | ret = viewer_session_set_trace_chunk_copy( | |
1977 | conn->viewer_session, | |
1978 | vstream->stream->trace_chunk); | |
1979 | if (ret) { | |
1980 | reply.status = htobe32(LTTNG_VIEWER_METADATA_ERR); | |
1981 | goto send_reply; | |
1982 | } | |
1983 | } | |
1984 | ||
1985 | if (conn->viewer_session->current_trace_chunk != | |
1986 | vstream->stream_file.trace_chunk) { | |
1987 | bool acquired_reference; | |
1988 | ||
1989 | DBG("Viewer session and viewer stream chunk differ: " | |
1990 | "vsession chunk %p vstream chunk %p", | |
1991 | conn->viewer_session->current_trace_chunk, | |
1992 | vstream->stream_file.trace_chunk); | |
1993 | lttng_trace_chunk_put(vstream->stream_file.trace_chunk); | |
1994 | acquired_reference = lttng_trace_chunk_get(conn->viewer_session->current_trace_chunk); | |
1995 | assert(acquired_reference); | |
1996 | vstream->stream_file.trace_chunk = | |
1997 | conn->viewer_session->current_trace_chunk; | |
1998 | viewer_stream_close_files(vstream); | |
1999 | } | |
2000 | ||
b0d240a2 MD |
2001 | len = vstream->stream->metadata_received - vstream->metadata_sent; |
2002 | ||
ad8bec24 JG |
2003 | /* |
2004 | * Either this is the first time the metadata file is read, or a | |
2005 | * rotation of the corresponding relay stream has occured. | |
2006 | */ | |
2007 | if (!vstream->stream_file.handle && len > 0) { | |
8bb66c3c | 2008 | struct fs_handle *fs_handle; |
ebb29c10 JG |
2009 | char file_path[LTTNG_PATH_MAX]; |
2010 | enum lttng_trace_chunk_status status; | |
2011 | struct relay_stream *rstream = vstream->stream; | |
2012 | ||
2013 | ret = utils_stream_file_path(rstream->path_name, | |
2014 | rstream->channel_name, rstream->tracefile_size, | |
2015 | vstream->current_tracefile_id, NULL, file_path, | |
2016 | sizeof(file_path)); | |
d3e2ba59 JD |
2017 | if (ret < 0) { |
2018 | goto error; | |
2019 | } | |
ebb29c10 | 2020 | |
3ff5c5db MD |
2021 | /* |
2022 | * It is possible the the metadata file we are trying to open is | |
2023 | * missing if the stream has been closed (application exits with | |
2024 | * per-pid buffers) and a clear command has been performed. | |
2025 | */ | |
8bb66c3c | 2026 | status = lttng_trace_chunk_open_fs_handle( |
ebb29c10 | 2027 | vstream->stream_file.trace_chunk, |
8bb66c3c | 2028 | file_path, O_RDONLY, 0, &fs_handle, true); |
ebb29c10 | 2029 | if (status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
b0d240a2 MD |
2030 | if (status == LTTNG_TRACE_CHUNK_STATUS_NO_FILE) { |
2031 | reply.status = htobe32(LTTNG_VIEWER_NO_NEW_METADATA); | |
2032 | len = 0; | |
2033 | if (vstream->stream->closed) { | |
2034 | viewer_stream_put(vstream); | |
2035 | } | |
2036 | goto send_reply; | |
2037 | } | |
ebb29c10 | 2038 | PERROR("Failed to open metadata file for viewer stream"); |
d3e2ba59 JD |
2039 | goto error; |
2040 | } | |
8bb66c3c | 2041 | vstream->stream_file.handle = fs_handle; |
ad8bec24 JG |
2042 | |
2043 | if (vstream->metadata_sent != 0) { | |
2044 | /* | |
2045 | * The client does not expect to receive any metadata | |
2046 | * it has received and metadata files in successive | |
2047 | * chunks must be a strict superset of one another. | |
2048 | * | |
2049 | * Skip the first `metadata_sent` bytes to ensure | |
2050 | * they are not sent a second time to the client. | |
2051 | * | |
2052 | * Baring a block layer error or an internal error, | |
2053 | * this seek should not fail as | |
2054 | * `vstream->stream->metadata_received` is reset when | |
2055 | * a relay stream is rotated. If this is reached, it is | |
2056 | * safe to assume that | |
2057 | * `metadata_received` > `metadata_sent`. | |
2058 | */ | |
2059 | const off_t seek_ret = fs_handle_seek(fs_handle, | |
2060 | vstream->metadata_sent, SEEK_SET); | |
2061 | ||
2062 | if (seek_ret < 0) { | |
2063 | PERROR("Failed to seek metadata viewer stream file to `sent` position: pos = %" PRId64, | |
2064 | vstream->metadata_sent); | |
2065 | reply.status = htobe32(LTTNG_VIEWER_METADATA_ERR); | |
2066 | goto send_reply; | |
2067 | } | |
2068 | } | |
d3e2ba59 JD |
2069 | } |
2070 | ||
2071 | reply.len = htobe64(len); | |
2072 | data = zmalloc(len); | |
2073 | if (!data) { | |
2074 | PERROR("viewer metadata zmalloc"); | |
2075 | goto error; | |
2076 | } | |
2077 | ||
8bb66c3c JG |
2078 | fd = fs_handle_get_fd(vstream->stream_file.handle); |
2079 | if (fd < 0) { | |
2080 | ERR("Failed to restore viewer stream file system handle"); | |
2081 | goto error; | |
2082 | } | |
2083 | read_len = lttng_read(fd, data, len); | |
2084 | fs_handle_put_fd(vstream->stream_file.handle); | |
2085 | fd = -1; | |
6cd525e8 | 2086 | if (read_len < len) { |
ad8bec24 JG |
2087 | if (read_len < 0) { |
2088 | PERROR("Failed to read metadata file"); | |
2089 | goto error; | |
2090 | } else { | |
2091 | /* | |
2092 | * A clear has been performed which prevents the relay | |
2093 | * from sending `len` bytes of metadata. | |
2094 | * | |
2095 | * It is important not to send any metadata if we | |
2096 | * couldn't read all the available metadata in one shot: | |
2097 | * sending partial metadata can cause the client to | |
2098 | * attempt to parse an incomplete (incoherent) metadata | |
2099 | * stream, which would result in an error. | |
2100 | */ | |
2101 | const off_t seek_ret = fs_handle_seek( | |
2102 | vstream->stream_file.handle, -read_len, | |
2103 | SEEK_CUR); | |
2104 | ||
cfa1e2c2 | 2105 | DBG("Failed to read metadata: requested = %" PRIu64 ", got = %zd", |
ad8bec24 JG |
2106 | len, read_len); |
2107 | read_len = 0; | |
2108 | len = 0; | |
2109 | if (seek_ret < 0) { | |
2110 | PERROR("Failed to restore metadata file position after partial read"); | |
2111 | ret = -1; | |
2112 | goto error; | |
2113 | } | |
2114 | } | |
d3e2ba59 | 2115 | } |
7591bab1 | 2116 | vstream->metadata_sent += read_len; |
c4e361a4 | 2117 | reply.status = htobe32(LTTNG_VIEWER_METADATA_OK); |
7591bab1 | 2118 | |
d3e2ba59 JD |
2119 | goto send_reply; |
2120 | ||
2121 | error: | |
c4e361a4 | 2122 | reply.status = htobe32(LTTNG_VIEWER_METADATA_ERR); |
d3e2ba59 JD |
2123 | |
2124 | send_reply: | |
eea7556c | 2125 | health_code_update(); |
7591bab1 MD |
2126 | if (vstream) { |
2127 | pthread_mutex_unlock(&vstream->stream->lock); | |
2128 | } | |
58eb9381 | 2129 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 2130 | if (ret < 0) { |
7591bab1 | 2131 | goto end_free; |
d3e2ba59 | 2132 | } |
eea7556c | 2133 | health_code_update(); |
d3e2ba59 JD |
2134 | |
2135 | if (len > 0) { | |
58eb9381 | 2136 | ret = send_response(conn->sock, data, len); |
d3e2ba59 | 2137 | if (ret < 0) { |
7591bab1 | 2138 | goto end_free; |
d3e2ba59 JD |
2139 | } |
2140 | } | |
2141 | ||
2142 | DBG("Sent %" PRIu64 " bytes of metadata for stream %" PRIu64, len, | |
9b9f9f94 | 2143 | (uint64_t) be64toh(request.stream_id)); |
d3e2ba59 JD |
2144 | |
2145 | DBG("Metadata sent"); | |
2146 | ||
7591bab1 | 2147 | end_free: |
d3e2ba59 | 2148 | free(data); |
d3e2ba59 | 2149 | end: |
7591bab1 MD |
2150 | if (vstream) { |
2151 | viewer_stream_put(vstream); | |
2152 | } | |
d3e2ba59 JD |
2153 | return ret; |
2154 | } | |
2155 | ||
c3b7390b JD |
2156 | /* |
2157 | * Create a viewer session. | |
2158 | * | |
2159 | * Return 0 on success or else a negative value. | |
2160 | */ | |
2161 | static | |
2162 | int viewer_create_session(struct relay_connection *conn) | |
2163 | { | |
2164 | int ret; | |
2165 | struct lttng_viewer_create_session_response resp; | |
2166 | ||
2167 | DBG("Viewer create session received"); | |
2168 | ||
53efb85a | 2169 | memset(&resp, 0, sizeof(resp)); |
c3b7390b | 2170 | resp.status = htobe32(LTTNG_VIEWER_CREATE_SESSION_OK); |
7591bab1 | 2171 | conn->viewer_session = viewer_session_create(); |
c3b7390b JD |
2172 | if (!conn->viewer_session) { |
2173 | ERR("Allocation viewer session"); | |
2174 | resp.status = htobe32(LTTNG_VIEWER_CREATE_SESSION_ERR); | |
2175 | goto send_reply; | |
2176 | } | |
c3b7390b JD |
2177 | |
2178 | send_reply: | |
2179 | health_code_update(); | |
2180 | ret = send_response(conn->sock, &resp, sizeof(resp)); | |
2181 | if (ret < 0) { | |
2182 | goto end; | |
2183 | } | |
2184 | health_code_update(); | |
2185 | ret = 0; | |
2186 | ||
2187 | end: | |
2188 | return ret; | |
2189 | } | |
2190 | ||
d62023be JD |
2191 | /* |
2192 | * Detach a viewer session. | |
2193 | * | |
2194 | * Return 0 on success or else a negative value. | |
2195 | */ | |
2196 | static | |
2197 | int viewer_detach_session(struct relay_connection *conn) | |
2198 | { | |
2199 | int ret; | |
2200 | struct lttng_viewer_detach_session_response response; | |
2201 | struct lttng_viewer_detach_session_request request; | |
2202 | struct relay_session *session = NULL; | |
2203 | uint64_t viewer_session_to_close; | |
2204 | ||
2205 | DBG("Viewer detach session received"); | |
2206 | ||
2207 | assert(conn); | |
2208 | ||
2209 | health_code_update(); | |
2210 | ||
2211 | /* Receive the request from the connected client. */ | |
2212 | ret = recv_request(conn->sock, &request, sizeof(request)); | |
2213 | if (ret < 0) { | |
2214 | goto end; | |
2215 | } | |
2216 | viewer_session_to_close = be64toh(request.session_id); | |
2217 | ||
2218 | if (!conn->viewer_session) { | |
2219 | DBG("Client trying to detach before creating a live viewer session"); | |
2220 | response.status = htobe32(LTTNG_VIEWER_DETACH_SESSION_ERR); | |
2221 | goto send_reply; | |
2222 | } | |
2223 | ||
2224 | health_code_update(); | |
2225 | ||
2226 | memset(&response, 0, sizeof(response)); | |
2227 | DBG("Detaching from session ID %" PRIu64, viewer_session_to_close); | |
2228 | ||
2229 | session = session_get_by_id(be64toh(request.session_id)); | |
2230 | if (!session) { | |
2231 | DBG("Relay session %" PRIu64 " not found", | |
9b9f9f94 | 2232 | (uint64_t) be64toh(request.session_id)); |
d62023be JD |
2233 | response.status = htobe32(LTTNG_VIEWER_DETACH_SESSION_UNK); |
2234 | goto send_reply; | |
2235 | } | |
2236 | ||
2237 | ret = viewer_session_is_attached(conn->viewer_session, session); | |
2238 | if (ret != 1) { | |
2239 | DBG("Not attached to this session"); | |
2240 | response.status = htobe32(LTTNG_VIEWER_DETACH_SESSION_ERR); | |
2241 | goto send_reply_put; | |
2242 | } | |
2243 | ||
2244 | viewer_session_close_one_session(conn->viewer_session, session); | |
2245 | response.status = htobe32(LTTNG_VIEWER_DETACH_SESSION_OK); | |
2246 | DBG("Session %" PRIu64 " detached.", viewer_session_to_close); | |
2247 | ||
2248 | send_reply_put: | |
2249 | session_put(session); | |
2250 | ||
2251 | send_reply: | |
2252 | health_code_update(); | |
2253 | ret = send_response(conn->sock, &response, sizeof(response)); | |
2254 | if (ret < 0) { | |
2255 | goto end; | |
2256 | } | |
2257 | health_code_update(); | |
2258 | ret = 0; | |
2259 | ||
2260 | end: | |
2261 | return ret; | |
2262 | } | |
c3b7390b | 2263 | |
d3e2ba59 JD |
2264 | /* |
2265 | * live_relay_unknown_command: send -1 if received unknown command | |
2266 | */ | |
2267 | static | |
58eb9381 | 2268 | void live_relay_unknown_command(struct relay_connection *conn) |
d3e2ba59 JD |
2269 | { |
2270 | struct lttcomm_relayd_generic_reply reply; | |
d3e2ba59 | 2271 | |
53efb85a | 2272 | memset(&reply, 0, sizeof(reply)); |
d3e2ba59 | 2273 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
58eb9381 | 2274 | (void) send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 JD |
2275 | } |
2276 | ||
2277 | /* | |
2278 | * Process the commands received on the control socket | |
2279 | */ | |
2280 | static | |
2281 | int process_control(struct lttng_viewer_cmd *recv_hdr, | |
58eb9381 | 2282 | struct relay_connection *conn) |
d3e2ba59 JD |
2283 | { |
2284 | int ret = 0; | |
2f8f53af DG |
2285 | uint32_t msg_value; |
2286 | ||
2f8f53af DG |
2287 | msg_value = be32toh(recv_hdr->cmd); |
2288 | ||
2289 | /* | |
2290 | * Make sure we've done the version check before any command other then a | |
2291 | * new client connection. | |
2292 | */ | |
c4e361a4 | 2293 | if (msg_value != LTTNG_VIEWER_CONNECT && !conn->version_check_done) { |
58eb9381 | 2294 | ERR("Viewer conn value %" PRIu32 " before version check", msg_value); |
2f8f53af DG |
2295 | ret = -1; |
2296 | goto end; | |
2297 | } | |
d3e2ba59 | 2298 | |
2f8f53af | 2299 | switch (msg_value) { |
c4e361a4 | 2300 | case LTTNG_VIEWER_CONNECT: |
58eb9381 | 2301 | ret = viewer_connect(conn); |
d3e2ba59 | 2302 | break; |
c4e361a4 | 2303 | case LTTNG_VIEWER_LIST_SESSIONS: |
58eb9381 | 2304 | ret = viewer_list_sessions(conn); |
d3e2ba59 | 2305 | break; |
c4e361a4 | 2306 | case LTTNG_VIEWER_ATTACH_SESSION: |
58eb9381 | 2307 | ret = viewer_attach_session(conn); |
d3e2ba59 | 2308 | break; |
c4e361a4 | 2309 | case LTTNG_VIEWER_GET_NEXT_INDEX: |
58eb9381 | 2310 | ret = viewer_get_next_index(conn); |
d3e2ba59 | 2311 | break; |
c4e361a4 | 2312 | case LTTNG_VIEWER_GET_PACKET: |
58eb9381 | 2313 | ret = viewer_get_packet(conn); |
d3e2ba59 | 2314 | break; |
c4e361a4 | 2315 | case LTTNG_VIEWER_GET_METADATA: |
58eb9381 | 2316 | ret = viewer_get_metadata(conn); |
d3e2ba59 | 2317 | break; |
c4e361a4 | 2318 | case LTTNG_VIEWER_GET_NEW_STREAMS: |
58eb9381 | 2319 | ret = viewer_get_new_streams(conn); |
80e8027a | 2320 | break; |
c3b7390b JD |
2321 | case LTTNG_VIEWER_CREATE_SESSION: |
2322 | ret = viewer_create_session(conn); | |
2323 | break; | |
d62023be JD |
2324 | case LTTNG_VIEWER_DETACH_SESSION: |
2325 | ret = viewer_detach_session(conn); | |
2326 | break; | |
d3e2ba59 | 2327 | default: |
7591bab1 MD |
2328 | ERR("Received unknown viewer command (%u)", |
2329 | be32toh(recv_hdr->cmd)); | |
58eb9381 | 2330 | live_relay_unknown_command(conn); |
d3e2ba59 JD |
2331 | ret = -1; |
2332 | goto end; | |
2333 | } | |
2334 | ||
2335 | end: | |
2336 | return ret; | |
2337 | } | |
2338 | ||
2339 | static | |
58eb9381 | 2340 | void cleanup_connection_pollfd(struct lttng_poll_event *events, int pollfd) |
d3e2ba59 JD |
2341 | { |
2342 | int ret; | |
2343 | ||
58eb9381 | 2344 | (void) lttng_poll_del(events, pollfd); |
d3e2ba59 | 2345 | |
29555a78 JG |
2346 | ret = fd_tracker_close_unsuspendable_fd(the_fd_tracker, &pollfd, 1, |
2347 | fd_tracker_util_close_fd, NULL); | |
d3e2ba59 JD |
2348 | if (ret < 0) { |
2349 | ERR("Closing pollfd %d", pollfd); | |
2350 | } | |
2351 | } | |
2352 | ||
d3e2ba59 JD |
2353 | /* |
2354 | * This thread does the actual work | |
2355 | */ | |
2356 | static | |
2357 | void *thread_worker(void *data) | |
2358 | { | |
2359 | int ret, err = -1; | |
2360 | uint32_t nb_fd; | |
d3e2ba59 | 2361 | struct lttng_poll_event events; |
7591bab1 | 2362 | struct lttng_ht *viewer_connections_ht; |
d3e2ba59 JD |
2363 | struct lttng_ht_iter iter; |
2364 | struct lttng_viewer_cmd recv_hdr; | |
302d8906 | 2365 | struct relay_connection *destroy_conn; |
d3e2ba59 JD |
2366 | |
2367 | DBG("[thread] Live viewer relay worker started"); | |
2368 | ||
2369 | rcu_register_thread(); | |
2370 | ||
eea7556c MD |
2371 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_WORKER); |
2372 | ||
9b5e0863 MD |
2373 | if (testpoint(relayd_thread_live_worker)) { |
2374 | goto error_testpoint; | |
2375 | } | |
2376 | ||
d3e2ba59 | 2377 | /* table of connections indexed on socket */ |
7591bab1 MD |
2378 | viewer_connections_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
2379 | if (!viewer_connections_ht) { | |
2380 | goto viewer_connections_ht_error; | |
d3e2ba59 JD |
2381 | } |
2382 | ||
35bc1f58 JG |
2383 | ret = create_named_thread_poll_set(&events, 2, |
2384 | "Live viewer worker thread epoll"); | |
d3e2ba59 JD |
2385 | if (ret < 0) { |
2386 | goto error_poll_create; | |
2387 | } | |
2388 | ||
58eb9381 | 2389 | ret = lttng_poll_add(&events, live_conn_pipe[0], LPOLLIN | LPOLLRDHUP); |
d3e2ba59 JD |
2390 | if (ret < 0) { |
2391 | goto error; | |
2392 | } | |
2393 | ||
2394 | restart: | |
2395 | while (1) { | |
2396 | int i; | |
2397 | ||
eea7556c MD |
2398 | health_code_update(); |
2399 | ||
d3e2ba59 JD |
2400 | /* Infinite blocking call, waiting for transmission */ |
2401 | DBG3("Relayd live viewer worker thread polling..."); | |
eea7556c | 2402 | health_poll_entry(); |
d3e2ba59 | 2403 | ret = lttng_poll_wait(&events, -1); |
eea7556c | 2404 | health_poll_exit(); |
d3e2ba59 JD |
2405 | if (ret < 0) { |
2406 | /* | |
2407 | * Restart interrupted system call. | |
2408 | */ | |
2409 | if (errno == EINTR) { | |
2410 | goto restart; | |
2411 | } | |
2412 | goto error; | |
2413 | } | |
2414 | ||
2415 | nb_fd = ret; | |
2416 | ||
2417 | /* | |
2418 | * Process control. The control connection is prioritised so we don't | |
2419 | * starve it with high throughput tracing data on the data | |
2420 | * connection. | |
2421 | */ | |
2422 | for (i = 0; i < nb_fd; i++) { | |
2423 | /* Fetch once the poll data */ | |
2424 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
2425 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
2426 | ||
eea7556c MD |
2427 | health_code_update(); |
2428 | ||
d3e2ba59 | 2429 | /* Thread quit pipe has been closed. Killing thread. */ |
bcf4a440 | 2430 | ret = check_thread_quit_pipe(pollfd, revents); |
d3e2ba59 JD |
2431 | if (ret) { |
2432 | err = 0; | |
2433 | goto exit; | |
2434 | } | |
2435 | ||
7591bab1 | 2436 | /* Inspect the relay conn pipe for new connection. */ |
58eb9381 | 2437 | if (pollfd == live_conn_pipe[0]) { |
03e43155 | 2438 | if (revents & LPOLLIN) { |
302d8906 JG |
2439 | struct relay_connection *conn; |
2440 | ||
7591bab1 MD |
2441 | ret = lttng_read(live_conn_pipe[0], |
2442 | &conn, sizeof(conn)); | |
d3e2ba59 JD |
2443 | if (ret < 0) { |
2444 | goto error; | |
2445 | } | |
73039936 FD |
2446 | ret = lttng_poll_add(&events, |
2447 | conn->sock->fd, | |
58eb9381 | 2448 | LPOLLIN | LPOLLRDHUP); |
73039936 FD |
2449 | if (ret) { |
2450 | ERR("Failed to add new live connection file descriptor to poll set"); | |
2451 | goto error; | |
2452 | } | |
7591bab1 MD |
2453 | connection_ht_add(viewer_connections_ht, conn); |
2454 | DBG("Connection socket %d added to poll", conn->sock->fd); | |
03e43155 MD |
2455 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
2456 | ERR("Relay live pipe error"); | |
2457 | goto error; | |
2458 | } else { | |
2459 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
2460 | goto error; | |
d3e2ba59 | 2461 | } |
58eb9381 | 2462 | } else { |
7591bab1 | 2463 | /* Connection activity. */ |
302d8906 JG |
2464 | struct relay_connection *conn; |
2465 | ||
7591bab1 MD |
2466 | conn = connection_get_by_sock(viewer_connections_ht, pollfd); |
2467 | if (!conn) { | |
2468 | continue; | |
2469 | } | |
58eb9381 | 2470 | |
03e43155 | 2471 | if (revents & LPOLLIN) { |
58eb9381 DG |
2472 | ret = conn->sock->ops->recvmsg(conn->sock, &recv_hdr, |
2473 | sizeof(recv_hdr), 0); | |
d3e2ba59 | 2474 | if (ret <= 0) { |
7591bab1 | 2475 | /* Connection closed. */ |
58eb9381 | 2476 | cleanup_connection_pollfd(&events, pollfd); |
7591bab1 MD |
2477 | /* Put "create" ownership reference. */ |
2478 | connection_put(conn); | |
58eb9381 | 2479 | DBG("Viewer control conn closed with %d", pollfd); |
d3e2ba59 | 2480 | } else { |
58eb9381 | 2481 | ret = process_control(&recv_hdr, conn); |
d3e2ba59 JD |
2482 | if (ret < 0) { |
2483 | /* Clear the session on error. */ | |
58eb9381 | 2484 | cleanup_connection_pollfd(&events, pollfd); |
7591bab1 MD |
2485 | /* Put "create" ownership reference. */ |
2486 | connection_put(conn); | |
d3e2ba59 JD |
2487 | DBG("Viewer connection closed with %d", pollfd); |
2488 | } | |
2489 | } | |
03e43155 MD |
2490 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
2491 | cleanup_connection_pollfd(&events, pollfd); | |
2492 | /* Put "create" ownership reference. */ | |
2493 | connection_put(conn); | |
2494 | } else { | |
2495 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
2496 | connection_put(conn); | |
2497 | goto error; | |
d3e2ba59 | 2498 | } |
7591bab1 MD |
2499 | /* Put local "get_by_sock" reference. */ |
2500 | connection_put(conn); | |
d3e2ba59 JD |
2501 | } |
2502 | } | |
2503 | } | |
2504 | ||
2505 | exit: | |
2506 | error: | |
35bc1f58 | 2507 | (void) fd_tracker_util_poll_clean(the_fd_tracker, &events); |
d3e2ba59 | 2508 | |
71efa8ef | 2509 | /* Cleanup remaining connection object. */ |
d3e2ba59 | 2510 | rcu_read_lock(); |
7591bab1 | 2511 | cds_lfht_for_each_entry(viewer_connections_ht->ht, &iter.iter, |
302d8906 | 2512 | destroy_conn, |
58eb9381 | 2513 | sock_n.node) { |
eea7556c | 2514 | health_code_update(); |
7591bab1 | 2515 | connection_put(destroy_conn); |
d3e2ba59 JD |
2516 | } |
2517 | rcu_read_unlock(); | |
2518 | error_poll_create: | |
7591bab1 MD |
2519 | lttng_ht_destroy(viewer_connections_ht); |
2520 | viewer_connections_ht_error: | |
58eb9381 | 2521 | /* Close relay conn pipes */ |
87bcbe91 | 2522 | (void) fd_tracker_util_pipe_close(the_fd_tracker, live_conn_pipe); |
d3e2ba59 JD |
2523 | if (err) { |
2524 | DBG("Viewer worker thread exited with error"); | |
2525 | } | |
2526 | DBG("Viewer worker thread cleanup complete"); | |
9b5e0863 | 2527 | error_testpoint: |
eea7556c MD |
2528 | if (err) { |
2529 | health_error(); | |
2530 | ERR("Health error occurred in %s", __func__); | |
2531 | } | |
2532 | health_unregister(health_relayd); | |
b4aacfdc MD |
2533 | if (lttng_relay_stop_threads()) { |
2534 | ERR("Error stopping threads"); | |
178a0557 | 2535 | } |
d3e2ba59 JD |
2536 | rcu_unregister_thread(); |
2537 | return NULL; | |
2538 | } | |
2539 | ||
2540 | /* | |
2541 | * Create the relay command pipe to wake thread_manage_apps. | |
2542 | * Closed in cleanup(). | |
2543 | */ | |
58eb9381 | 2544 | static int create_conn_pipe(void) |
d3e2ba59 | 2545 | { |
87bcbe91 JG |
2546 | return fd_tracker_util_pipe_open_cloexec(the_fd_tracker, |
2547 | "Live connection pipe", live_conn_pipe); | |
178a0557 | 2548 | } |
d3e2ba59 | 2549 | |
178a0557 | 2550 | int relayd_live_join(void) |
d3e2ba59 | 2551 | { |
178a0557 | 2552 | int ret, retval = 0; |
d3e2ba59 JD |
2553 | void *status; |
2554 | ||
d3e2ba59 | 2555 | ret = pthread_join(live_listener_thread, &status); |
178a0557 MD |
2556 | if (ret) { |
2557 | errno = ret; | |
d3e2ba59 | 2558 | PERROR("pthread_join live listener"); |
178a0557 | 2559 | retval = -1; |
d3e2ba59 JD |
2560 | } |
2561 | ||
2562 | ret = pthread_join(live_worker_thread, &status); | |
178a0557 MD |
2563 | if (ret) { |
2564 | errno = ret; | |
d3e2ba59 | 2565 | PERROR("pthread_join live worker"); |
178a0557 | 2566 | retval = -1; |
d3e2ba59 JD |
2567 | } |
2568 | ||
2569 | ret = pthread_join(live_dispatcher_thread, &status); | |
178a0557 MD |
2570 | if (ret) { |
2571 | errno = ret; | |
d3e2ba59 | 2572 | PERROR("pthread_join live dispatcher"); |
178a0557 | 2573 | retval = -1; |
d3e2ba59 JD |
2574 | } |
2575 | ||
178a0557 | 2576 | cleanup_relayd_live(); |
d3e2ba59 | 2577 | |
178a0557 | 2578 | return retval; |
d3e2ba59 JD |
2579 | } |
2580 | ||
2581 | /* | |
2582 | * main | |
2583 | */ | |
7591bab1 | 2584 | int relayd_live_create(struct lttng_uri *uri) |
d3e2ba59 | 2585 | { |
178a0557 | 2586 | int ret = 0, retval = 0; |
d3e2ba59 JD |
2587 | void *status; |
2588 | int is_root; | |
2589 | ||
178a0557 MD |
2590 | if (!uri) { |
2591 | retval = -1; | |
2592 | goto exit_init_data; | |
2593 | } | |
d3e2ba59 JD |
2594 | live_uri = uri; |
2595 | ||
d3e2ba59 JD |
2596 | /* Check if daemon is UID = 0 */ |
2597 | is_root = !getuid(); | |
2598 | ||
2599 | if (!is_root) { | |
2600 | if (live_uri->port < 1024) { | |
2601 | ERR("Need to be root to use ports < 1024"); | |
178a0557 MD |
2602 | retval = -1; |
2603 | goto exit_init_data; | |
d3e2ba59 JD |
2604 | } |
2605 | } | |
2606 | ||
2607 | /* Setup the thread apps communication pipe. */ | |
178a0557 MD |
2608 | if (create_conn_pipe()) { |
2609 | retval = -1; | |
2610 | goto exit_init_data; | |
d3e2ba59 JD |
2611 | } |
2612 | ||
2613 | /* Init relay command queue. */ | |
8bdee6e2 | 2614 | cds_wfcq_init(&viewer_conn_queue.head, &viewer_conn_queue.tail); |
d3e2ba59 JD |
2615 | |
2616 | /* Set up max poll set size */ | |
25b397f9 MD |
2617 | if (lttng_poll_set_max_size()) { |
2618 | retval = -1; | |
2619 | goto exit_init_data; | |
2620 | } | |
d3e2ba59 JD |
2621 | |
2622 | /* Setup the dispatcher thread */ | |
1a1a34b4 | 2623 | ret = pthread_create(&live_dispatcher_thread, default_pthread_attr(), |
d3e2ba59 | 2624 | thread_dispatcher, (void *) NULL); |
178a0557 MD |
2625 | if (ret) { |
2626 | errno = ret; | |
d3e2ba59 | 2627 | PERROR("pthread_create viewer dispatcher"); |
178a0557 MD |
2628 | retval = -1; |
2629 | goto exit_dispatcher_thread; | |
d3e2ba59 JD |
2630 | } |
2631 | ||
2632 | /* Setup the worker thread */ | |
1a1a34b4 | 2633 | ret = pthread_create(&live_worker_thread, default_pthread_attr(), |
7591bab1 | 2634 | thread_worker, NULL); |
178a0557 MD |
2635 | if (ret) { |
2636 | errno = ret; | |
d3e2ba59 | 2637 | PERROR("pthread_create viewer worker"); |
178a0557 MD |
2638 | retval = -1; |
2639 | goto exit_worker_thread; | |
d3e2ba59 JD |
2640 | } |
2641 | ||
2642 | /* Setup the listener thread */ | |
1a1a34b4 | 2643 | ret = pthread_create(&live_listener_thread, default_pthread_attr(), |
d3e2ba59 | 2644 | thread_listener, (void *) NULL); |
178a0557 MD |
2645 | if (ret) { |
2646 | errno = ret; | |
d3e2ba59 | 2647 | PERROR("pthread_create viewer listener"); |
178a0557 MD |
2648 | retval = -1; |
2649 | goto exit_listener_thread; | |
d3e2ba59 JD |
2650 | } |
2651 | ||
178a0557 MD |
2652 | /* |
2653 | * All OK, started all threads. | |
2654 | */ | |
2655 | return retval; | |
2656 | ||
9911d21b JG |
2657 | /* |
2658 | * Join on the live_listener_thread should anything be added after | |
2659 | * the live_listener thread's creation. | |
2660 | */ | |
d3e2ba59 | 2661 | |
178a0557 | 2662 | exit_listener_thread: |
d3e2ba59 | 2663 | |
d3e2ba59 | 2664 | ret = pthread_join(live_worker_thread, &status); |
178a0557 MD |
2665 | if (ret) { |
2666 | errno = ret; | |
d3e2ba59 | 2667 | PERROR("pthread_join live worker"); |
178a0557 | 2668 | retval = -1; |
d3e2ba59 | 2669 | } |
178a0557 | 2670 | exit_worker_thread: |
d3e2ba59 | 2671 | |
d3e2ba59 | 2672 | ret = pthread_join(live_dispatcher_thread, &status); |
178a0557 MD |
2673 | if (ret) { |
2674 | errno = ret; | |
d3e2ba59 | 2675 | PERROR("pthread_join live dispatcher"); |
178a0557 | 2676 | retval = -1; |
d3e2ba59 | 2677 | } |
178a0557 | 2678 | exit_dispatcher_thread: |
d3e2ba59 | 2679 | |
178a0557 MD |
2680 | exit_init_data: |
2681 | cleanup_relayd_live(); | |
d3e2ba59 | 2682 | |
178a0557 | 2683 | return retval; |
d3e2ba59 | 2684 | } |