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 |
28ab034a JG |
11 | #include "cmd.hpp" |
12 | #include "connection.hpp" | |
13 | #include "ctf-trace.hpp" | |
14 | #include "health-relayd.hpp" | |
15 | #include "live.hpp" | |
16 | #include "lttng-relayd.hpp" | |
17 | #include "session.hpp" | |
18 | #include "stream.hpp" | |
19 | #include "testpoint.hpp" | |
20 | #include "utils.hpp" | |
21 | #include "viewer-session.hpp" | |
22 | #include "viewer-stream.hpp" | |
23 | ||
24 | #include <common/common.hpp> | |
25 | #include <common/compat/endian.hpp> | |
26 | #include <common/compat/poll.hpp> | |
27 | #include <common/compat/socket.hpp> | |
28 | #include <common/defaults.hpp> | |
29 | #include <common/fd-tracker/utils.hpp> | |
30 | #include <common/fs-handle.hpp> | |
31 | #include <common/futex.hpp> | |
32 | #include <common/index/index.hpp> | |
33 | #include <common/sessiond-comm/inet.hpp> | |
34 | #include <common/sessiond-comm/relayd.hpp> | |
35 | #include <common/sessiond-comm/sessiond-comm.hpp> | |
36 | #include <common/uri.hpp> | |
37 | #include <common/utils.hpp> | |
38 | ||
39 | #include <lttng/lttng.h> | |
40 | ||
8bb66c3c | 41 | #include <fcntl.h> |
d3e2ba59 JD |
42 | #include <getopt.h> |
43 | #include <grp.h> | |
8bb66c3c | 44 | #include <inttypes.h> |
d3e2ba59 JD |
45 | #include <limits.h> |
46 | #include <pthread.h> | |
47 | #include <signal.h> | |
48 | #include <stdio.h> | |
49 | #include <stdlib.h> | |
50 | #include <string.h> | |
28ab034a | 51 | #include <string> |
d3e2ba59 JD |
52 | #include <sys/mman.h> |
53 | #include <sys/mount.h> | |
54 | #include <sys/resource.h> | |
55 | #include <sys/socket.h> | |
56 | #include <sys/stat.h> | |
57 | #include <sys/types.h> | |
58 | #include <sys/wait.h> | |
8bb66c3c | 59 | #include <unistd.h> |
d3e2ba59 | 60 | #include <urcu/futex.h> |
7591bab1 | 61 | #include <urcu/rculist.h> |
8bb66c3c | 62 | #include <urcu/uatomic.h> |
d3e2ba59 | 63 | |
28ab034a | 64 | #define SESSION_BUF_DEFAULT_COUNT 16 |
d3e2ba59 JD |
65 | |
66 | static struct lttng_uri *live_uri; | |
67 | ||
d3e2ba59 JD |
68 | /* |
69 | * This pipe is used to inform the worker thread that a command is queued and | |
70 | * ready to be processed. | |
71 | */ | |
58eb9381 | 72 | static int live_conn_pipe[2] = { -1, -1 }; |
d3e2ba59 JD |
73 | |
74 | /* Shared between threads */ | |
75 | static int live_dispatch_thread_exit; | |
76 | ||
77 | static pthread_t live_listener_thread; | |
78 | static pthread_t live_dispatcher_thread; | |
79 | static pthread_t live_worker_thread; | |
80 | ||
81 | /* | |
82 | * Relay command queue. | |
83 | * | |
84 | * The live_thread_listener and live_thread_dispatcher communicate with this | |
85 | * queue. | |
86 | */ | |
58eb9381 | 87 | static struct relay_conn_queue viewer_conn_queue; |
d3e2ba59 JD |
88 | |
89 | static uint64_t last_relay_viewer_session_id; | |
28ab034a | 90 | static pthread_mutex_t last_relay_viewer_session_id_lock = PTHREAD_MUTEX_INITIALIZER; |
d3e2ba59 | 91 | |
28ab034a | 92 | static const char *lttng_viewer_command_str(lttng_viewer_command cmd) |
7201079f FD |
93 | { |
94 | switch (cmd) { | |
95 | case LTTNG_VIEWER_CONNECT: | |
96 | return "CONNECT"; | |
97 | case LTTNG_VIEWER_LIST_SESSIONS: | |
98 | return "LIST_SESSIONS"; | |
99 | case LTTNG_VIEWER_ATTACH_SESSION: | |
100 | return "ATTACH_SESSION"; | |
101 | case LTTNG_VIEWER_GET_NEXT_INDEX: | |
102 | return "GET_NEXT_INDEX"; | |
103 | case LTTNG_VIEWER_GET_PACKET: | |
104 | return "GET_PACKET"; | |
105 | case LTTNG_VIEWER_GET_METADATA: | |
106 | return "GET_METADATA"; | |
107 | case LTTNG_VIEWER_GET_NEW_STREAMS: | |
108 | return "GET_NEW_STREAMS"; | |
109 | case LTTNG_VIEWER_CREATE_SESSION: | |
110 | return "CREATE_SESSION"; | |
111 | case LTTNG_VIEWER_DETACH_SESSION: | |
112 | return "DETACH_SESSION"; | |
113 | default: | |
114 | abort(); | |
115 | } | |
116 | } | |
117 | ||
28ab034a JG |
118 | static const char * |
119 | lttng_viewer_next_index_return_code_str(enum lttng_viewer_next_index_return_code code) | |
7e4fb89b FD |
120 | { |
121 | switch (code) { | |
122 | case LTTNG_VIEWER_INDEX_OK: | |
123 | return "INDEX_OK"; | |
124 | case LTTNG_VIEWER_INDEX_RETRY: | |
125 | return "INDEX_RETRY"; | |
126 | case LTTNG_VIEWER_INDEX_HUP: | |
127 | return "INDEX_HUP"; | |
128 | case LTTNG_VIEWER_INDEX_ERR: | |
129 | return "INDEX_ERR"; | |
130 | case LTTNG_VIEWER_INDEX_INACTIVE: | |
131 | return "INDEX_INACTIVE"; | |
132 | case LTTNG_VIEWER_INDEX_EOF: | |
133 | return "INDEX_EOF"; | |
134 | default: | |
135 | abort(); | |
136 | } | |
137 | } | |
138 | ||
28ab034a | 139 | static const char *lttng_viewer_attach_return_code_str(enum lttng_viewer_attach_return_code code) |
07d9fffa FD |
140 | { |
141 | switch (code) { | |
142 | case LTTNG_VIEWER_ATTACH_OK: | |
143 | return "ATTACH_OK"; | |
144 | case LTTNG_VIEWER_ATTACH_ALREADY: | |
145 | return "ATTACH_ALREADY"; | |
146 | case LTTNG_VIEWER_ATTACH_UNK: | |
147 | return "ATTACH_UNK"; | |
148 | case LTTNG_VIEWER_ATTACH_NOT_LIVE: | |
149 | return "ATTACH_NOT_LIVE"; | |
150 | case LTTNG_VIEWER_ATTACH_SEEK_ERR: | |
151 | return "ATTACH_SEEK_ERR"; | |
152 | case LTTNG_VIEWER_ATTACH_NO_SESSION: | |
153 | return "ATTACH_NO_SESSION"; | |
154 | default: | |
155 | abort(); | |
156 | } | |
157 | }; | |
158 | ||
28ab034a JG |
159 | static const char * |
160 | lttng_viewer_get_packet_return_code_str(enum lttng_viewer_get_packet_return_code code) | |
556d5fae FD |
161 | { |
162 | switch (code) { | |
163 | case LTTNG_VIEWER_GET_PACKET_OK: | |
164 | return "GET_PACKET_OK"; | |
165 | case LTTNG_VIEWER_GET_PACKET_RETRY: | |
166 | return "GET_PACKET_RETRY"; | |
167 | case LTTNG_VIEWER_GET_PACKET_ERR: | |
168 | return "GET_PACKET_ERR"; | |
169 | case LTTNG_VIEWER_GET_PACKET_EOF: | |
170 | return "GET_PACKET_EOF"; | |
171 | default: | |
172 | abort(); | |
173 | } | |
174 | }; | |
175 | ||
d3e2ba59 JD |
176 | /* |
177 | * Cleanup the daemon | |
178 | */ | |
cd9adb8b | 179 | static void cleanup_relayd_live() |
d3e2ba59 JD |
180 | { |
181 | DBG("Cleaning up"); | |
182 | ||
d3e2ba59 JD |
183 | free(live_uri); |
184 | } | |
185 | ||
2f8f53af DG |
186 | /* |
187 | * Receive a request buffer using a given socket, destination allocated buffer | |
188 | * of length size. | |
189 | * | |
190 | * Return the size of the received message or else a negative value on error | |
191 | * with errno being set by recvmsg() syscall. | |
192 | */ | |
28ab034a | 193 | static ssize_t recv_request(struct lttcomm_sock *sock, void *buf, size_t size) |
2f8f53af DG |
194 | { |
195 | ssize_t ret; | |
196 | ||
2f8f53af DG |
197 | ret = sock->ops->recvmsg(sock, buf, size, 0); |
198 | if (ret < 0 || ret != size) { | |
199 | if (ret == 0) { | |
200 | /* Orderly shutdown. Not necessary to print an error. */ | |
201 | DBG("Socket %d did an orderly shutdown", sock->fd); | |
202 | } else { | |
203 | ERR("Relay failed to receive request."); | |
204 | } | |
205 | ret = -1; | |
206 | } | |
207 | ||
208 | return ret; | |
209 | } | |
210 | ||
211 | /* | |
212 | * Send a response buffer using a given socket, source allocated buffer of | |
213 | * length size. | |
214 | * | |
215 | * Return the size of the sent message or else a negative value on error with | |
216 | * errno being set by sendmsg() syscall. | |
217 | */ | |
28ab034a | 218 | static ssize_t send_response(struct lttcomm_sock *sock, void *buf, size_t size) |
2f8f53af DG |
219 | { |
220 | ssize_t ret; | |
221 | ||
2f8f53af DG |
222 | ret = sock->ops->sendmsg(sock, buf, size, 0); |
223 | if (ret < 0) { | |
224 | ERR("Relayd failed to send response."); | |
225 | } | |
226 | ||
227 | return ret; | |
228 | } | |
229 | ||
230 | /* | |
f04a971b JD |
231 | * Atomically check if new streams got added in one of the sessions attached |
232 | * and reset the flag to 0. | |
2f8f53af DG |
233 | * |
234 | * Returns 1 if new streams got added, 0 if nothing changed, a negative value | |
235 | * on error. | |
236 | */ | |
28ab034a | 237 | static int check_new_streams(struct relay_connection *conn) |
2f8f53af | 238 | { |
2f8f53af | 239 | struct relay_session *session; |
f04a971b JD |
240 | unsigned long current_val; |
241 | int ret = 0; | |
2f8f53af | 242 | |
f04a971b JD |
243 | if (!conn->viewer_session) { |
244 | goto end; | |
245 | } | |
7591bab1 | 246 | rcu_read_lock(); |
28ab034a JG |
247 | cds_list_for_each_entry_rcu( |
248 | session, &conn->viewer_session->session_list, viewer_session_node) | |
249 | { | |
7591bab1 MD |
250 | if (!session_get(session)) { |
251 | continue; | |
252 | } | |
f04a971b JD |
253 | current_val = uatomic_cmpxchg(&session->new_streams, 1, 0); |
254 | ret = current_val; | |
7591bab1 | 255 | session_put(session); |
f04a971b JD |
256 | if (ret == 1) { |
257 | goto end; | |
258 | } | |
2f8f53af | 259 | } |
f04a971b | 260 | end: |
7591bab1 | 261 | rcu_read_unlock(); |
2f8f53af DG |
262 | return ret; |
263 | } | |
264 | ||
265 | /* | |
266 | * Send viewer streams to the given socket. The ignore_sent_flag indicates if | |
267 | * this function should ignore the sent flag or not. | |
268 | * | |
269 | * Return 0 on success or else a negative value. | |
270 | */ | |
28ab034a JG |
271 | static ssize_t |
272 | send_viewer_streams(struct lttcomm_sock *sock, uint64_t session_id, unsigned int ignore_sent_flag) | |
2f8f53af DG |
273 | { |
274 | ssize_t ret; | |
2f8f53af DG |
275 | struct lttng_ht_iter iter; |
276 | struct relay_viewer_stream *vstream; | |
277 | ||
2f8f53af DG |
278 | rcu_read_lock(); |
279 | ||
28ab034a | 280 | cds_lfht_for_each_entry (viewer_streams_ht->ht, &iter.iter, vstream, stream_n.node) { |
2a174661 | 281 | struct ctf_trace *ctf_trace; |
aaabc543 | 282 | struct lttng_viewer_stream send_stream = {}; |
2a174661 | 283 | |
2f8f53af DG |
284 | health_code_update(); |
285 | ||
7591bab1 MD |
286 | if (!viewer_stream_get(vstream)) { |
287 | continue; | |
288 | } | |
289 | ||
290 | pthread_mutex_lock(&vstream->stream->lock); | |
2f8f53af | 291 | /* Ignore if not the same session. */ |
c06fdd95 | 292 | if (vstream->stream->trace->session->id != session_id || |
28ab034a | 293 | (!ignore_sent_flag && vstream->sent_flag)) { |
7591bab1 MD |
294 | pthread_mutex_unlock(&vstream->stream->lock); |
295 | viewer_stream_put(vstream); | |
2f8f53af DG |
296 | continue; |
297 | } | |
298 | ||
7591bab1 MD |
299 | ctf_trace = vstream->stream->trace; |
300 | send_stream.id = htobe64(vstream->stream->stream_handle); | |
2a174661 | 301 | send_stream.ctf_trace_id = htobe64(ctf_trace->id); |
28ab034a JG |
302 | send_stream.metadata_flag = htobe32(vstream->stream->is_metadata); |
303 | if (lttng_strncpy(send_stream.path_name, | |
304 | vstream->path_name, | |
305 | sizeof(send_stream.path_name))) { | |
f8f011fb MD |
306 | pthread_mutex_unlock(&vstream->stream->lock); |
307 | viewer_stream_put(vstream); | |
28ab034a | 308 | ret = -1; /* Error. */ |
f8f011fb MD |
309 | goto end_unlock; |
310 | } | |
311 | if (lttng_strncpy(send_stream.channel_name, | |
28ab034a JG |
312 | vstream->channel_name, |
313 | sizeof(send_stream.channel_name))) { | |
f8f011fb MD |
314 | pthread_mutex_unlock(&vstream->stream->lock); |
315 | viewer_stream_put(vstream); | |
28ab034a | 316 | ret = -1; /* Error. */ |
f8f011fb MD |
317 | goto end_unlock; |
318 | } | |
2f8f53af | 319 | |
28ab034a | 320 | DBG("Sending stream %" PRIu64 " to viewer", vstream->stream->stream_handle); |
cd9adb8b | 321 | vstream->sent_flag = true; |
7591bab1 MD |
322 | pthread_mutex_unlock(&vstream->stream->lock); |
323 | ||
2f8f53af | 324 | ret = send_response(sock, &send_stream, sizeof(send_stream)); |
7591bab1 | 325 | viewer_stream_put(vstream); |
2f8f53af DG |
326 | if (ret < 0) { |
327 | goto end_unlock; | |
328 | } | |
2f8f53af DG |
329 | } |
330 | ||
331 | ret = 0; | |
332 | ||
333 | end_unlock: | |
334 | rcu_read_unlock(); | |
335 | return ret; | |
336 | } | |
337 | ||
338 | /* | |
339 | * Create every viewer stream possible for the given session with the seek | |
340 | * type. Three counters *can* be return which are in order the total amount of | |
341 | * viewer stream of the session, the number of unsent stream and the number of | |
342 | * stream created. Those counters can be NULL and thus will be ignored. | |
343 | * | |
c06fdd95 JG |
344 | * session must be locked to ensure that we see either none or all initial |
345 | * streams for a session, but no intermediate state.. | |
346 | * | |
2f8f53af DG |
347 | * Return 0 on success or else a negative value. |
348 | */ | |
9edaf114 | 349 | static int make_viewer_streams(struct relay_session *relay_session, |
28ab034a JG |
350 | struct relay_viewer_session *viewer_session, |
351 | enum lttng_viewer_seek seek_t, | |
352 | uint32_t *nb_total, | |
353 | uint32_t *nb_unsent, | |
354 | uint32_t *nb_created, | |
355 | bool *closed) | |
2f8f53af DG |
356 | { |
357 | int ret; | |
2f8f53af | 358 | struct lttng_ht_iter iter; |
2a174661 | 359 | struct ctf_trace *ctf_trace; |
cd9adb8b | 360 | struct relay_stream *relay_stream = nullptr; |
2f8f53af | 361 | |
a0377dfe | 362 | LTTNG_ASSERT(relay_session); |
9edaf114 | 363 | ASSERT_LOCKED(relay_session->lock); |
2f8f53af | 364 | |
9edaf114 | 365 | if (relay_session->connection_closed) { |
bddf80e4 MD |
366 | *closed = true; |
367 | } | |
368 | ||
2f8f53af | 369 | /* |
7591bab1 MD |
370 | * Create viewer streams for relay streams that are ready to be |
371 | * used for a the given session id only. | |
2f8f53af | 372 | */ |
2a174661 | 373 | rcu_read_lock(); |
28ab034a JG |
374 | cds_lfht_for_each_entry ( |
375 | relay_session->ctf_traces_ht->ht, &iter.iter, ctf_trace, node.node) { | |
123ed7c2 | 376 | bool trace_has_metadata_stream = false; |
2f8f53af DG |
377 | |
378 | health_code_update(); | |
379 | ||
7591bab1 | 380 | if (!ctf_trace_get(ctf_trace)) { |
2f8f53af DG |
381 | continue; |
382 | } | |
383 | ||
123ed7c2 FD |
384 | /* |
385 | * Iterate over all the streams of the trace to see if we have a | |
386 | * metadata stream. | |
387 | */ | |
28ab034a | 388 | cds_list_for_each_entry_rcu(relay_stream, &ctf_trace->stream_list, stream_node) |
123ed7c2 | 389 | { |
9edaf114 JG |
390 | bool is_metadata_stream; |
391 | ||
392 | pthread_mutex_lock(&relay_stream->lock); | |
393 | is_metadata_stream = relay_stream->is_metadata; | |
394 | pthread_mutex_unlock(&relay_stream->lock); | |
395 | ||
396 | if (is_metadata_stream) { | |
123ed7c2 FD |
397 | trace_has_metadata_stream = true; |
398 | break; | |
399 | } | |
400 | } | |
401 | ||
cd9adb8b | 402 | relay_stream = nullptr; |
9edaf114 | 403 | |
123ed7c2 FD |
404 | /* |
405 | * If there is no metadata stream in this trace at the moment | |
406 | * and we never sent one to the viewer, skip the trace. We | |
407 | * accept that the viewer will not see this trace at all. | |
408 | */ | |
28ab034a | 409 | if (!trace_has_metadata_stream && !ctf_trace->metadata_stream_sent_to_viewer) { |
3d7708ff JG |
410 | ctf_trace_put(ctf_trace); |
411 | continue; | |
123ed7c2 FD |
412 | } |
413 | ||
28ab034a | 414 | cds_list_for_each_entry_rcu(relay_stream, &ctf_trace->stream_list, stream_node) |
9edaf114 JG |
415 | { |
416 | struct relay_viewer_stream *viewer_stream; | |
2a174661 | 417 | |
9edaf114 | 418 | if (!stream_get(relay_stream)) { |
2a174661 DG |
419 | continue; |
420 | } | |
9edaf114 JG |
421 | |
422 | pthread_mutex_lock(&relay_stream->lock); | |
7591bab1 | 423 | /* |
d812ecb9 | 424 | * stream published is protected by the session lock. |
7591bab1 | 425 | */ |
9edaf114 | 426 | if (!relay_stream->published) { |
7591bab1 MD |
427 | goto next; |
428 | } | |
28ab034a | 429 | viewer_stream = viewer_stream_get_by_id(relay_stream->stream_handle); |
9edaf114 | 430 | if (!viewer_stream) { |
cd9adb8b | 431 | struct lttng_trace_chunk *viewer_stream_trace_chunk = nullptr; |
9edaf114 | 432 | |
123ed7c2 FD |
433 | /* |
434 | * Save that we sent the metadata stream to the | |
435 | * viewer. So that we know what trace the viewer | |
436 | * is aware of. | |
437 | */ | |
9edaf114 JG |
438 | if (relay_stream->is_metadata) { |
439 | ctf_trace->metadata_stream_sent_to_viewer = true; | |
440 | } | |
441 | ||
442 | /* | |
443 | * If a rotation is ongoing, use a copy of the | |
444 | * relay stream's chunk to ensure the stream | |
445 | * files exist. | |
446 | * | |
447 | * Otherwise, the viewer session's current trace | |
448 | * chunk can be used safely. | |
449 | */ | |
450 | if ((relay_stream->ongoing_rotation.is_set || | |
28ab034a JG |
451 | session_has_ongoing_rotation(relay_session)) && |
452 | relay_stream->trace_chunk) { | |
453 | viewer_stream_trace_chunk = | |
454 | lttng_trace_chunk_copy(relay_stream->trace_chunk); | |
9edaf114 JG |
455 | if (!viewer_stream_trace_chunk) { |
456 | ret = -1; | |
457 | ctf_trace_put(ctf_trace); | |
458 | goto error_unlock; | |
459 | } | |
460 | } else { | |
80516611 | 461 | /* |
28ab034a JG |
462 | * Transition the viewer session into the newest trace chunk |
463 | * available. | |
80516611 | 464 | */ |
28ab034a JG |
465 | if (!lttng_trace_chunk_ids_equal( |
466 | viewer_session->current_trace_chunk, | |
467 | relay_stream->trace_chunk)) { | |
80516611 | 468 | ret = viewer_session_set_trace_chunk_copy( |
28ab034a | 469 | viewer_session, relay_stream->trace_chunk); |
80516611 JG |
470 | if (ret) { |
471 | ret = -1; | |
472 | ctf_trace_put(ctf_trace); | |
473 | goto error_unlock; | |
474 | } | |
475 | } | |
9edaf114 | 476 | |
87250ba1 JG |
477 | if (relay_stream->trace_chunk) { |
478 | /* | |
479 | * If the corresponding relay | |
480 | * stream's trace chunk is set, | |
481 | * the viewer stream will be | |
482 | * created under it. | |
483 | * | |
484 | * Note that a relay stream can | |
485 | * have a NULL output trace | |
486 | * chunk (for instance, after a | |
487 | * clear against a stopped | |
488 | * session). | |
489 | */ | |
28ab034a JG |
490 | const bool reference_acquired = |
491 | lttng_trace_chunk_get( | |
87250ba1 JG |
492 | viewer_session->current_trace_chunk); |
493 | ||
494 | LTTNG_ASSERT(reference_acquired); | |
495 | viewer_stream_trace_chunk = | |
28ab034a | 496 | viewer_session->current_trace_chunk; |
87250ba1 | 497 | } |
123ed7c2 | 498 | } |
9edaf114 JG |
499 | |
500 | viewer_stream = viewer_stream_create( | |
28ab034a | 501 | relay_stream, viewer_stream_trace_chunk, seek_t); |
9edaf114 | 502 | lttng_trace_chunk_put(viewer_stream_trace_chunk); |
cd9adb8b | 503 | viewer_stream_trace_chunk = nullptr; |
9edaf114 | 504 | if (!viewer_stream) { |
2a174661 | 505 | ret = -1; |
7591bab1 | 506 | ctf_trace_put(ctf_trace); |
2a174661 DG |
507 | goto error_unlock; |
508 | } | |
2a174661 DG |
509 | |
510 | if (nb_created) { | |
511 | /* Update number of created stream counter. */ | |
512 | (*nb_created)++; | |
513 | } | |
2229a09c MD |
514 | /* |
515 | * Ensure a self-reference is preserved even | |
516 | * after we have put our local reference. | |
517 | */ | |
9edaf114 | 518 | if (!viewer_stream_get(viewer_stream)) { |
862d3a3b MD |
519 | ERR("Unable to get self-reference on viewer stream, logic error."); |
520 | abort(); | |
521 | } | |
7591bab1 | 522 | } else { |
9edaf114 | 523 | if (!viewer_stream->sent_flag && nb_unsent) { |
7591bab1 MD |
524 | /* Update number of unsent stream counter. */ |
525 | (*nb_unsent)++; | |
526 | } | |
2f8f53af | 527 | } |
2a174661 DG |
528 | /* Update number of total stream counter. */ |
529 | if (nb_total) { | |
9edaf114 JG |
530 | if (relay_stream->is_metadata) { |
531 | if (!relay_stream->closed || | |
28ab034a JG |
532 | relay_stream->metadata_received > |
533 | viewer_stream->metadata_sent) { | |
2229a09c MD |
534 | (*nb_total)++; |
535 | } | |
536 | } else { | |
9edaf114 | 537 | if (!relay_stream->closed || |
28ab034a JG |
538 | !(((int64_t) (relay_stream->prev_data_seq - |
539 | relay_stream->last_net_seq_num)) >= 0)) { | |
2229a09c MD |
540 | (*nb_total)++; |
541 | } | |
542 | } | |
2f8f53af | 543 | } |
2229a09c | 544 | /* Put local reference. */ |
9edaf114 | 545 | viewer_stream_put(viewer_stream); |
7591bab1 | 546 | next: |
9edaf114 JG |
547 | pthread_mutex_unlock(&relay_stream->lock); |
548 | stream_put(relay_stream); | |
2f8f53af | 549 | } |
cd9adb8b | 550 | relay_stream = nullptr; |
7591bab1 | 551 | ctf_trace_put(ctf_trace); |
2f8f53af DG |
552 | } |
553 | ||
554 | ret = 0; | |
555 | ||
556 | error_unlock: | |
2a174661 | 557 | rcu_read_unlock(); |
80516611 | 558 | |
9edaf114 JG |
559 | if (relay_stream) { |
560 | pthread_mutex_unlock(&relay_stream->lock); | |
561 | stream_put(relay_stream); | |
562 | } | |
563 | ||
2f8f53af DG |
564 | return ret; |
565 | } | |
566 | ||
cd9adb8b | 567 | int relayd_live_stop() |
d3e2ba59 | 568 | { |
b4aacfdc | 569 | /* Stop dispatch thread */ |
d3e2ba59 | 570 | CMM_STORE_SHARED(live_dispatch_thread_exit, 1); |
58eb9381 | 571 | futex_nto1_wake(&viewer_conn_queue.futex); |
b4aacfdc | 572 | return 0; |
d3e2ba59 JD |
573 | } |
574 | ||
28ab034a | 575 | static int create_sock(void *data, int *out_fd) |
8855795d JG |
576 | { |
577 | int ret; | |
ac497a37 | 578 | struct lttcomm_sock *sock = (lttcomm_sock *) data; |
8855795d JG |
579 | |
580 | ret = lttcomm_create_sock(sock); | |
581 | if (ret < 0) { | |
582 | goto end; | |
583 | } | |
584 | ||
585 | *out_fd = sock->fd; | |
586 | end: | |
587 | return ret; | |
588 | } | |
589 | ||
28ab034a | 590 | static int close_sock(void *data, int *in_fd __attribute__((unused))) |
8855795d | 591 | { |
ac497a37 | 592 | struct lttcomm_sock *sock = (lttcomm_sock *) data; |
8855795d JG |
593 | |
594 | return sock->ops->close(sock); | |
595 | } | |
596 | ||
29555a78 JG |
597 | static int accept_sock(void *data, int *out_fd) |
598 | { | |
599 | int ret = 0; | |
600 | /* Socks is an array of in_sock, out_sock. */ | |
ac497a37 | 601 | struct lttcomm_sock **socks = (lttcomm_sock **) data; |
29555a78 JG |
602 | struct lttcomm_sock *in_sock = socks[0]; |
603 | ||
604 | socks[1] = in_sock->ops->accept(in_sock); | |
605 | if (!socks[1]) { | |
606 | ret = -1; | |
607 | goto end; | |
608 | } | |
609 | *out_fd = socks[1]->fd; | |
610 | end: | |
611 | return ret; | |
612 | } | |
613 | ||
28ab034a | 614 | static struct lttcomm_sock *accept_live_sock(struct lttcomm_sock *listening_sock, const char *name) |
29555a78 JG |
615 | { |
616 | int out_fd, ret; | |
cd9adb8b JG |
617 | struct lttcomm_sock *socks[2] = { listening_sock, nullptr }; |
618 | struct lttcomm_sock *new_sock = nullptr; | |
29555a78 | 619 | |
28ab034a JG |
620 | ret = fd_tracker_open_unsuspendable_fd( |
621 | the_fd_tracker, &out_fd, (const char **) &name, 1, accept_sock, &socks); | |
29555a78 JG |
622 | if (ret) { |
623 | goto end; | |
624 | } | |
625 | new_sock = socks[1]; | |
626 | DBG("%s accepted, socket %d", name, new_sock->fd); | |
627 | end: | |
628 | return new_sock; | |
629 | } | |
630 | ||
d3e2ba59 JD |
631 | /* |
632 | * Create and init socket from uri. | |
633 | */ | |
28ab034a | 634 | static struct lttcomm_sock *init_socket(struct lttng_uri *uri, const char *name) |
d3e2ba59 | 635 | { |
8855795d | 636 | int ret, sock_fd; |
cd9adb8b | 637 | struct lttcomm_sock *sock = nullptr; |
8855795d | 638 | char uri_str[LTTNG_PATH_MAX]; |
cd9adb8b | 639 | char *formated_name = nullptr; |
d3e2ba59 JD |
640 | |
641 | sock = lttcomm_alloc_sock_from_uri(uri); | |
cd9adb8b | 642 | if (sock == nullptr) { |
d3e2ba59 JD |
643 | ERR("Allocating socket"); |
644 | goto error; | |
645 | } | |
646 | ||
8855795d JG |
647 | /* |
648 | * Don't fail to create the socket if the name can't be built as it is | |
649 | * only used for debugging purposes. | |
650 | */ | |
651 | ret = uri_to_str_url(uri, uri_str, sizeof(uri_str)); | |
652 | uri_str[sizeof(uri_str) - 1] = '\0'; | |
653 | if (ret >= 0) { | |
28ab034a | 654 | ret = asprintf(&formated_name, "%s socket @ %s", name, uri_str); |
8855795d | 655 | if (ret < 0) { |
cd9adb8b | 656 | formated_name = nullptr; |
8855795d | 657 | } |
d3e2ba59 | 658 | } |
8855795d | 659 | |
28ab034a JG |
660 | ret = fd_tracker_open_unsuspendable_fd(the_fd_tracker, |
661 | &sock_fd, | |
662 | (const char **) (formated_name ? &formated_name : | |
cd9adb8b | 663 | nullptr), |
28ab034a JG |
664 | 1, |
665 | create_sock, | |
666 | sock); | |
d546eeec | 667 | if (ret) { |
28ab034a | 668 | PERROR("Failed to create \"%s\" socket", formated_name ?: "Unknown"); |
d546eeec JG |
669 | goto error; |
670 | } | |
8855795d | 671 | DBG("Listening on %s socket %d", name, sock->fd); |
d3e2ba59 JD |
672 | |
673 | ret = sock->ops->bind(sock); | |
674 | if (ret < 0) { | |
2288467f | 675 | PERROR("Failed to bind lttng-live socket"); |
d3e2ba59 JD |
676 | goto error; |
677 | } | |
678 | ||
679 | ret = sock->ops->listen(sock, -1); | |
680 | if (ret < 0) { | |
681 | goto error; | |
d3e2ba59 JD |
682 | } |
683 | ||
d546eeec | 684 | free(formated_name); |
d3e2ba59 JD |
685 | return sock; |
686 | ||
687 | error: | |
688 | if (sock) { | |
689 | lttcomm_destroy_sock(sock); | |
690 | } | |
d546eeec | 691 | free(formated_name); |
cd9adb8b | 692 | return nullptr; |
d3e2ba59 JD |
693 | } |
694 | ||
695 | /* | |
696 | * This thread manages the listening for new connections on the network | |
697 | */ | |
28ab034a | 698 | static void *thread_listener(void *data __attribute__((unused))) |
d3e2ba59 | 699 | { |
8a00688e MJ |
700 | int i, ret, err = -1; |
701 | uint32_t nb_fd; | |
d3e2ba59 JD |
702 | struct lttng_poll_event events; |
703 | struct lttcomm_sock *live_control_sock; | |
704 | ||
705 | DBG("[thread] Relay live listener started"); | |
706 | ||
8fba2b8d | 707 | rcu_register_thread(); |
eea7556c MD |
708 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_LISTENER); |
709 | ||
710 | health_code_update(); | |
711 | ||
8855795d | 712 | live_control_sock = init_socket(live_uri, "Live listener"); |
d3e2ba59 JD |
713 | if (!live_control_sock) { |
714 | goto error_sock_control; | |
715 | } | |
716 | ||
fb4d42ab | 717 | /* Pass 2 as size here for the thread quit pipe and control sockets. */ |
28ab034a | 718 | ret = create_named_thread_poll_set(&events, 2, "Live listener thread epoll"); |
d3e2ba59 JD |
719 | if (ret < 0) { |
720 | goto error_create_poll; | |
721 | } | |
722 | ||
723 | /* Add the control socket */ | |
724 | ret = lttng_poll_add(&events, live_control_sock->fd, LPOLLIN | LPOLLRDHUP); | |
725 | if (ret < 0) { | |
726 | goto error_poll_add; | |
727 | } | |
728 | ||
3fd27398 MD |
729 | lttng_relay_notify_ready(); |
730 | ||
9b5e0863 MD |
731 | if (testpoint(relayd_thread_live_listener)) { |
732 | goto error_testpoint; | |
733 | } | |
734 | ||
cd9adb8b | 735 | while (true) { |
eea7556c MD |
736 | health_code_update(); |
737 | ||
d3e2ba59 JD |
738 | DBG("Listener accepting live viewers connections"); |
739 | ||
28ab034a | 740 | restart: |
eea7556c | 741 | health_poll_entry(); |
d3e2ba59 | 742 | ret = lttng_poll_wait(&events, -1); |
eea7556c | 743 | health_poll_exit(); |
d3e2ba59 JD |
744 | if (ret < 0) { |
745 | /* | |
746 | * Restart interrupted system call. | |
747 | */ | |
748 | if (errno == EINTR) { | |
749 | goto restart; | |
750 | } | |
751 | goto error; | |
752 | } | |
753 | nb_fd = ret; | |
754 | ||
755 | DBG("Relay new viewer connection received"); | |
756 | for (i = 0; i < nb_fd; i++) { | |
757 | /* Fetch once the poll data */ | |
8a00688e MJ |
758 | const auto revents = LTTNG_POLL_GETEV(&events, i); |
759 | const auto pollfd = LTTNG_POLL_GETFD(&events, i); | |
760 | ||
761 | health_code_update(); | |
d3e2ba59 | 762 | |
8a00688e MJ |
763 | /* Activity on thread quit pipe, exiting. */ |
764 | if (relayd_is_thread_quit_pipe(pollfd)) { | |
765 | DBG("Activity on thread quit pipe"); | |
d3e2ba59 JD |
766 | err = 0; |
767 | goto exit; | |
768 | } | |
769 | ||
03e43155 | 770 | if (revents & LPOLLIN) { |
d3e2ba59 | 771 | /* |
7591bab1 MD |
772 | * A new connection is requested, therefore a |
773 | * viewer connection is allocated in this | |
774 | * thread, enqueued to a global queue and | |
775 | * dequeued (and freed) in the worker thread. | |
d3e2ba59 | 776 | */ |
58eb9381 DG |
777 | int val = 1; |
778 | struct relay_connection *new_conn; | |
d3e2ba59 JD |
779 | struct lttcomm_sock *newsock; |
780 | ||
29555a78 | 781 | newsock = accept_live_sock(live_control_sock, |
28ab034a | 782 | "Live socket to client"); |
d3e2ba59 JD |
783 | if (!newsock) { |
784 | PERROR("accepting control sock"); | |
d3e2ba59 JD |
785 | goto error; |
786 | } | |
787 | DBG("Relay viewer connection accepted socket %d", newsock->fd); | |
58eb9381 | 788 | |
28ab034a JG |
789 | ret = setsockopt( |
790 | newsock->fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val)); | |
d3e2ba59 JD |
791 | if (ret < 0) { |
792 | PERROR("setsockopt inet"); | |
793 | lttcomm_destroy_sock(newsock); | |
d3e2ba59 JD |
794 | goto error; |
795 | } | |
7591bab1 MD |
796 | new_conn = connection_create(newsock, RELAY_CONNECTION_UNKNOWN); |
797 | if (!new_conn) { | |
798 | lttcomm_destroy_sock(newsock); | |
799 | goto error; | |
800 | } | |
801 | /* Ownership assumed by the connection. */ | |
cd9adb8b | 802 | newsock = nullptr; |
d3e2ba59 | 803 | |
58eb9381 | 804 | /* Enqueue request for the dispatcher thread. */ |
ac497a37 SM |
805 | cds_wfcq_head_ptr_t head; |
806 | head.h = &viewer_conn_queue.head; | |
28ab034a | 807 | cds_wfcq_enqueue(head, &viewer_conn_queue.tail, &new_conn->qnode); |
d3e2ba59 JD |
808 | |
809 | /* | |
7591bab1 MD |
810 | * Wake the dispatch queue futex. |
811 | * Implicit memory barrier with the | |
812 | * exchange in cds_wfcq_enqueue. | |
d3e2ba59 | 813 | */ |
58eb9381 | 814 | futex_nto1_wake(&viewer_conn_queue.futex); |
03e43155 MD |
815 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
816 | ERR("socket poll error"); | |
817 | goto error; | |
818 | } else { | |
819 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
820 | goto error; | |
d3e2ba59 JD |
821 | } |
822 | } | |
823 | } | |
824 | ||
825 | exit: | |
826 | error: | |
827 | error_poll_add: | |
9b5e0863 | 828 | error_testpoint: |
23f940ff | 829 | (void) fd_tracker_util_poll_clean(the_fd_tracker, &events); |
d3e2ba59 JD |
830 | error_create_poll: |
831 | if (live_control_sock->fd >= 0) { | |
8855795d JG |
832 | int sock_fd = live_control_sock->fd; |
833 | ||
28ab034a JG |
834 | ret = fd_tracker_close_unsuspendable_fd( |
835 | the_fd_tracker, &sock_fd, 1, close_sock, live_control_sock); | |
d3e2ba59 JD |
836 | if (ret) { |
837 | PERROR("close"); | |
838 | } | |
8855795d | 839 | live_control_sock->fd = -1; |
d3e2ba59 JD |
840 | } |
841 | lttcomm_destroy_sock(live_control_sock); | |
842 | error_sock_control: | |
843 | if (err) { | |
eea7556c | 844 | health_error(); |
d3e2ba59 JD |
845 | DBG("Live viewer listener thread exited with error"); |
846 | } | |
eea7556c | 847 | health_unregister(health_relayd); |
8fba2b8d | 848 | rcu_unregister_thread(); |
d3e2ba59 | 849 | DBG("Live viewer listener thread cleanup complete"); |
b4aacfdc MD |
850 | if (lttng_relay_stop_threads()) { |
851 | ERR("Error stopping threads"); | |
178a0557 | 852 | } |
cd9adb8b | 853 | return nullptr; |
d3e2ba59 JD |
854 | } |
855 | ||
856 | /* | |
857 | * This thread manages the dispatching of the requests to worker threads | |
858 | */ | |
28ab034a | 859 | static void *thread_dispatcher(void *data __attribute__((unused))) |
d3e2ba59 | 860 | { |
6cd525e8 MD |
861 | int err = -1; |
862 | ssize_t ret; | |
8bdee6e2 | 863 | struct cds_wfcq_node *node; |
cd9adb8b | 864 | struct relay_connection *conn = nullptr; |
d3e2ba59 JD |
865 | |
866 | DBG("[thread] Live viewer relay dispatcher started"); | |
867 | ||
eea7556c MD |
868 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_DISPATCHER); |
869 | ||
9b5e0863 MD |
870 | if (testpoint(relayd_thread_live_dispatcher)) { |
871 | goto error_testpoint; | |
872 | } | |
873 | ||
eea7556c MD |
874 | health_code_update(); |
875 | ||
0ed3b1a8 | 876 | for (;;) { |
eea7556c MD |
877 | health_code_update(); |
878 | ||
d3e2ba59 | 879 | /* Atomically prepare the queue futex */ |
58eb9381 | 880 | futex_nto1_prepare(&viewer_conn_queue.futex); |
d3e2ba59 | 881 | |
0ed3b1a8 MD |
882 | if (CMM_LOAD_SHARED(live_dispatch_thread_exit)) { |
883 | break; | |
884 | } | |
885 | ||
d3e2ba59 | 886 | do { |
eea7556c MD |
887 | health_code_update(); |
888 | ||
d3e2ba59 | 889 | /* Dequeue commands */ |
8bdee6e2 SM |
890 | node = cds_wfcq_dequeue_blocking(&viewer_conn_queue.head, |
891 | &viewer_conn_queue.tail); | |
cd9adb8b | 892 | if (node == nullptr) { |
d3e2ba59 | 893 | DBG("Woken up but nothing in the live-viewer " |
28ab034a | 894 | "relay command queue"); |
d3e2ba59 JD |
895 | /* Continue thread execution */ |
896 | break; | |
897 | } | |
0114db0e | 898 | conn = lttng::utils::container_of(node, &relay_connection::qnode); |
28ab034a | 899 | DBG("Dispatching viewer request waiting on sock %d", conn->sock->fd); |
d3e2ba59 JD |
900 | |
901 | /* | |
7591bab1 MD |
902 | * Inform worker thread of the new request. This |
903 | * call is blocking so we can be assured that | |
904 | * the data will be read at some point in time | |
905 | * or wait to the end of the world :) | |
d3e2ba59 | 906 | */ |
5c7248cd JG |
907 | ret = lttng_write(live_conn_pipe[1], &conn, sizeof(conn)); /* NOLINT sizeof |
908 | used on a | |
909 | pointer. */ | |
58eb9381 DG |
910 | if (ret < 0) { |
911 | PERROR("write conn pipe"); | |
7591bab1 | 912 | connection_put(conn); |
d3e2ba59 JD |
913 | goto error; |
914 | } | |
cd9adb8b | 915 | } while (node != nullptr); |
d3e2ba59 JD |
916 | |
917 | /* Futex wait on queue. Blocking call on futex() */ | |
eea7556c | 918 | health_poll_entry(); |
58eb9381 | 919 | futex_nto1_wait(&viewer_conn_queue.futex); |
eea7556c | 920 | health_poll_exit(); |
d3e2ba59 JD |
921 | } |
922 | ||
eea7556c MD |
923 | /* Normal exit, no error */ |
924 | err = 0; | |
925 | ||
d3e2ba59 | 926 | error: |
9b5e0863 | 927 | error_testpoint: |
eea7556c MD |
928 | if (err) { |
929 | health_error(); | |
930 | ERR("Health error occurred in %s", __func__); | |
931 | } | |
932 | health_unregister(health_relayd); | |
d3e2ba59 | 933 | DBG("Live viewer dispatch thread dying"); |
b4aacfdc MD |
934 | if (lttng_relay_stop_threads()) { |
935 | ERR("Error stopping threads"); | |
178a0557 | 936 | } |
cd9adb8b | 937 | return nullptr; |
d3e2ba59 JD |
938 | } |
939 | ||
940 | /* | |
941 | * Establish connection with the viewer and check the versions. | |
942 | * | |
943 | * Return 0 on success or else negative value. | |
944 | */ | |
28ab034a | 945 | static int viewer_connect(struct relay_connection *conn) |
d3e2ba59 JD |
946 | { |
947 | int ret; | |
948 | struct lttng_viewer_connect reply, msg; | |
949 | ||
cd9adb8b | 950 | conn->version_check_done = true; |
d3e2ba59 | 951 | |
eea7556c MD |
952 | health_code_update(); |
953 | ||
58eb9381 | 954 | ret = recv_request(conn->sock, &msg, sizeof(msg)); |
2f8f53af | 955 | if (ret < 0) { |
d3e2ba59 JD |
956 | goto end; |
957 | } | |
958 | ||
eea7556c MD |
959 | health_code_update(); |
960 | ||
f46b2ce6 | 961 | memset(&reply, 0, sizeof(reply)); |
d3e2ba59 JD |
962 | reply.major = RELAYD_VERSION_COMM_MAJOR; |
963 | reply.minor = RELAYD_VERSION_COMM_MINOR; | |
964 | ||
965 | /* Major versions must be the same */ | |
966 | if (reply.major != be32toh(msg.major)) { | |
2f8f53af | 967 | DBG("Incompatible major versions ([relayd] %u vs [client] %u)", |
28ab034a JG |
968 | reply.major, |
969 | be32toh(msg.major)); | |
72180669 | 970 | ret = -1; |
d3e2ba59 JD |
971 | goto end; |
972 | } | |
973 | ||
58eb9381 | 974 | conn->major = reply.major; |
d3e2ba59 JD |
975 | /* We adapt to the lowest compatible version */ |
976 | if (reply.minor <= be32toh(msg.minor)) { | |
58eb9381 | 977 | conn->minor = reply.minor; |
d3e2ba59 | 978 | } else { |
58eb9381 | 979 | conn->minor = be32toh(msg.minor); |
d3e2ba59 JD |
980 | } |
981 | ||
c4e361a4 | 982 | if (be32toh(msg.type) == LTTNG_VIEWER_CLIENT_COMMAND) { |
58eb9381 | 983 | conn->type = RELAY_VIEWER_COMMAND; |
c4e361a4 | 984 | } else if (be32toh(msg.type) == LTTNG_VIEWER_CLIENT_NOTIFICATION) { |
58eb9381 | 985 | conn->type = RELAY_VIEWER_NOTIFICATION; |
d3e2ba59 JD |
986 | } else { |
987 | ERR("Unknown connection type : %u", be32toh(msg.type)); | |
988 | ret = -1; | |
989 | goto end; | |
990 | } | |
991 | ||
992 | reply.major = htobe32(reply.major); | |
993 | reply.minor = htobe32(reply.minor); | |
58eb9381 | 994 | if (conn->type == RELAY_VIEWER_COMMAND) { |
93b4787b | 995 | /* |
7591bab1 MD |
996 | * Increment outside of htobe64 macro, because the argument can |
997 | * be used more than once within the macro, and thus the | |
998 | * operation may be undefined. | |
93b4787b | 999 | */ |
7591bab1 | 1000 | pthread_mutex_lock(&last_relay_viewer_session_id_lock); |
93b4787b | 1001 | last_relay_viewer_session_id++; |
7591bab1 | 1002 | pthread_mutex_unlock(&last_relay_viewer_session_id_lock); |
93b4787b | 1003 | reply.viewer_session_id = htobe64(last_relay_viewer_session_id); |
d3e2ba59 | 1004 | } |
eea7556c MD |
1005 | |
1006 | health_code_update(); | |
1007 | ||
58eb9381 | 1008 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 1009 | if (ret < 0) { |
2f8f53af | 1010 | goto end; |
d3e2ba59 JD |
1011 | } |
1012 | ||
eea7556c MD |
1013 | health_code_update(); |
1014 | ||
58eb9381 | 1015 | DBG("Version check done using protocol %u.%u", conn->major, conn->minor); |
d3e2ba59 JD |
1016 | ret = 0; |
1017 | ||
1018 | end: | |
1019 | return ret; | |
1020 | } | |
1021 | ||
1022 | /* | |
1023 | * Send the viewer the list of current sessions. | |
7591bab1 MD |
1024 | * We need to create a copy of the hash table content because otherwise |
1025 | * we cannot assume the number of entries stays the same between getting | |
1026 | * the number of HT elements and iteration over the HT. | |
d3e2ba59 JD |
1027 | * |
1028 | * Return 0 on success or else a negative value. | |
1029 | */ | |
28ab034a | 1030 | static int viewer_list_sessions(struct relay_connection *conn) |
d3e2ba59 | 1031 | { |
5f10c6b1 | 1032 | int ret = 0; |
d3e2ba59 | 1033 | struct lttng_viewer_list_sessions session_list; |
d3e2ba59 | 1034 | struct lttng_ht_iter iter; |
d3e2ba59 | 1035 | struct relay_session *session; |
cd9adb8b | 1036 | struct lttng_viewer_session *send_session_buf = nullptr; |
7591bab1 MD |
1037 | uint32_t buf_count = SESSION_BUF_DEFAULT_COUNT; |
1038 | uint32_t count = 0; | |
d3e2ba59 | 1039 | |
64803277 | 1040 | send_session_buf = calloc<lttng_viewer_session>(SESSION_BUF_DEFAULT_COUNT); |
7591bab1 MD |
1041 | if (!send_session_buf) { |
1042 | return -1; | |
d3e2ba59 JD |
1043 | } |
1044 | ||
7591bab1 | 1045 | rcu_read_lock(); |
28ab034a | 1046 | cds_lfht_for_each_entry (sessions_ht->ht, &iter.iter, session, session_n.node) { |
7591bab1 | 1047 | struct lttng_viewer_session *send_session; |
d3e2ba59 | 1048 | |
eea7556c MD |
1049 | health_code_update(); |
1050 | ||
d995f382 | 1051 | pthread_mutex_lock(&session->lock); |
7e0a4379 JR |
1052 | if (session->connection_closed) { |
1053 | /* Skip closed session */ | |
d995f382 JG |
1054 | goto next_session; |
1055 | } | |
7e0a4379 | 1056 | |
7591bab1 MD |
1057 | if (count >= buf_count) { |
1058 | struct lttng_viewer_session *newbuf; | |
1059 | uint32_t new_buf_count = buf_count << 1; | |
eea7556c | 1060 | |
28ab034a JG |
1061 | newbuf = (lttng_viewer_session *) realloc( |
1062 | send_session_buf, new_buf_count * sizeof(*send_session_buf)); | |
7591bab1 MD |
1063 | if (!newbuf) { |
1064 | ret = -1; | |
d995f382 | 1065 | goto break_loop; |
7591bab1 MD |
1066 | } |
1067 | send_session_buf = newbuf; | |
1068 | buf_count = new_buf_count; | |
6763619c | 1069 | } |
7591bab1 | 1070 | send_session = &send_session_buf[count]; |
bfc3fb17 | 1071 | if (lttng_strncpy(send_session->session_name, |
28ab034a JG |
1072 | session->session_name, |
1073 | sizeof(send_session->session_name))) { | |
bfc3fb17 | 1074 | ret = -1; |
d995f382 | 1075 | goto break_loop; |
bfc3fb17 | 1076 | } |
28ab034a JG |
1077 | if (lttng_strncpy(send_session->hostname, |
1078 | session->hostname, | |
1079 | sizeof(send_session->hostname))) { | |
bfc3fb17 | 1080 | ret = -1; |
d995f382 | 1081 | goto break_loop; |
bfc3fb17 | 1082 | } |
7591bab1 MD |
1083 | send_session->id = htobe64(session->id); |
1084 | send_session->live_timer = htobe32(session->live_timer); | |
1085 | if (session->viewer_attached) { | |
1086 | send_session->clients = htobe32(1); | |
1087 | } else { | |
1088 | send_session->clients = htobe32(0); | |
d227d5bd | 1089 | } |
7591bab1 MD |
1090 | send_session->streams = htobe32(session->stream_count); |
1091 | count++; | |
d995f382 JG |
1092 | next_session: |
1093 | pthread_mutex_unlock(&session->lock); | |
1094 | continue; | |
1095 | break_loop: | |
1096 | pthread_mutex_unlock(&session->lock); | |
1097 | break; | |
7591bab1 MD |
1098 | } |
1099 | rcu_read_unlock(); | |
5f10c6b1 JG |
1100 | if (ret < 0) { |
1101 | goto end_free; | |
1102 | } | |
d227d5bd | 1103 | |
7591bab1 | 1104 | session_list.sessions_count = htobe32(count); |
d227d5bd | 1105 | |
7591bab1 | 1106 | health_code_update(); |
d227d5bd | 1107 | |
7591bab1 MD |
1108 | ret = send_response(conn->sock, &session_list, sizeof(session_list)); |
1109 | if (ret < 0) { | |
1110 | goto end_free; | |
d227d5bd | 1111 | } |
d227d5bd | 1112 | |
7591bab1 | 1113 | health_code_update(); |
d227d5bd | 1114 | |
28ab034a | 1115 | ret = send_response(conn->sock, send_session_buf, count * sizeof(*send_session_buf)); |
7591bab1 MD |
1116 | if (ret < 0) { |
1117 | goto end_free; | |
d227d5bd | 1118 | } |
7591bab1 | 1119 | health_code_update(); |
d227d5bd | 1120 | |
7591bab1 MD |
1121 | ret = 0; |
1122 | end_free: | |
1123 | free(send_session_buf); | |
1124 | return ret; | |
d227d5bd JD |
1125 | } |
1126 | ||
80e8027a | 1127 | /* |
7591bab1 | 1128 | * Send the viewer the list of current streams. |
80e8027a | 1129 | */ |
28ab034a | 1130 | static int viewer_get_new_streams(struct relay_connection *conn) |
80e8027a JD |
1131 | { |
1132 | int ret, send_streams = 0; | |
7591bab1 | 1133 | uint32_t nb_created = 0, nb_unsent = 0, nb_streams = 0, nb_total = 0; |
80e8027a JD |
1134 | struct lttng_viewer_new_streams_request request; |
1135 | struct lttng_viewer_new_streams_response response; | |
cd9adb8b | 1136 | struct relay_session *session = nullptr; |
6763619c | 1137 | uint64_t session_id; |
bddf80e4 | 1138 | bool closed = false; |
80e8027a | 1139 | |
a0377dfe | 1140 | LTTNG_ASSERT(conn); |
80e8027a | 1141 | |
80e8027a JD |
1142 | health_code_update(); |
1143 | ||
2f8f53af | 1144 | /* Receive the request from the connected client. */ |
58eb9381 | 1145 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 1146 | if (ret < 0) { |
80e8027a JD |
1147 | goto error; |
1148 | } | |
6763619c | 1149 | session_id = be64toh(request.session_id); |
80e8027a JD |
1150 | |
1151 | health_code_update(); | |
1152 | ||
53efb85a MD |
1153 | memset(&response, 0, sizeof(response)); |
1154 | ||
7591bab1 | 1155 | session = session_get_by_id(session_id); |
2f8f53af | 1156 | if (!session) { |
6763619c | 1157 | DBG("Relay session %" PRIu64 " not found", session_id); |
c4e361a4 | 1158 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_ERR); |
80e8027a JD |
1159 | goto send_reply; |
1160 | } | |
1161 | ||
7591bab1 | 1162 | if (!viewer_session_is_attached(conn->viewer_session, session)) { |
c4e361a4 | 1163 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_ERR); |
80e8027a JD |
1164 | goto send_reply; |
1165 | } | |
1166 | ||
c876d657 JR |
1167 | /* |
1168 | * For any new stream, create it with LTTNG_VIEWER_SEEK_BEGINNING since | |
1169 | * that at this point the client is already attached to the session.Aany | |
1170 | * initial stream will have been created with the seek type at attach | |
1171 | * time (for now most readers use the LTTNG_VIEWER_SEEK_LAST on attach). | |
1172 | * Otherwise any event happening in a new stream between the attach and | |
1173 | * a call to viewer_get_new_streams will be "lost" (never received) from | |
1174 | * the viewer's point of view. | |
1175 | */ | |
c06fdd95 | 1176 | pthread_mutex_lock(&session->lock); |
8cd15f6a MD |
1177 | /* |
1178 | * If a session rotation is ongoing, do not attempt to open any | |
1179 | * stream, because the chunk can be in an intermediate state | |
1180 | * due to directory renaming. | |
1181 | */ | |
fe88e517 | 1182 | if (session_has_ongoing_rotation(session)) { |
8cd15f6a MD |
1183 | DBG("Relay session %" PRIu64 " rotation ongoing", session_id); |
1184 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_NO_NEW); | |
1185 | goto send_reply_unlock; | |
1186 | } | |
b66a15d1 | 1187 | ret = make_viewer_streams(session, |
28ab034a JG |
1188 | conn->viewer_session, |
1189 | LTTNG_VIEWER_SEEK_BEGINNING, | |
1190 | &nb_total, | |
1191 | &nb_unsent, | |
1192 | &nb_created, | |
1193 | &closed); | |
2f8f53af | 1194 | if (ret < 0) { |
14e34907 JG |
1195 | /* |
1196 | * This is caused by an internal error; propagate the negative | |
1197 | * 'ret' to close the connection. | |
1198 | */ | |
1199 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_ERR); | |
0283afa9 | 1200 | goto send_reply_unlock; |
2f8f53af | 1201 | } |
3d0bbd40 JG |
1202 | send_streams = 1; |
1203 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_OK); | |
b66a15d1 | 1204 | |
2f8f53af DG |
1205 | /* Only send back the newly created streams with the unsent ones. */ |
1206 | nb_streams = nb_created + nb_unsent; | |
80e8027a JD |
1207 | response.streams_count = htobe32(nb_streams); |
1208 | ||
4479f682 | 1209 | /* |
2229a09c MD |
1210 | * If the session is closed, HUP when there are no more streams |
1211 | * with data. | |
4479f682 | 1212 | */ |
bddf80e4 | 1213 | if (closed && nb_total == 0) { |
4479f682 | 1214 | send_streams = 0; |
bddf80e4 | 1215 | response.streams_count = 0; |
4479f682 | 1216 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_HUP); |
3d0bbd40 | 1217 | goto send_reply_unlock; |
4479f682 | 1218 | } |
3d0bbd40 JG |
1219 | send_reply_unlock: |
1220 | pthread_mutex_unlock(&session->lock); | |
4479f682 | 1221 | |
80e8027a JD |
1222 | send_reply: |
1223 | health_code_update(); | |
58eb9381 | 1224 | ret = send_response(conn->sock, &response, sizeof(response)); |
80e8027a | 1225 | if (ret < 0) { |
7591bab1 | 1226 | goto end_put_session; |
80e8027a JD |
1227 | } |
1228 | health_code_update(); | |
1229 | ||
1230 | /* | |
7591bab1 MD |
1231 | * Unknown or empty session, just return gracefully, the viewer |
1232 | * knows what is happening. | |
80e8027a JD |
1233 | */ |
1234 | if (!send_streams || !nb_streams) { | |
1235 | ret = 0; | |
7591bab1 | 1236 | goto end_put_session; |
80e8027a JD |
1237 | } |
1238 | ||
2f8f53af | 1239 | /* |
7591bab1 MD |
1240 | * Send stream and *DON'T* ignore the sent flag so every viewer |
1241 | * streams that were not sent from that point will be sent to | |
1242 | * the viewer. | |
2f8f53af | 1243 | */ |
c06fdd95 | 1244 | ret = send_viewer_streams(conn->sock, session_id, 0); |
2f8f53af | 1245 | if (ret < 0) { |
7591bab1 | 1246 | goto end_put_session; |
80e8027a JD |
1247 | } |
1248 | ||
7591bab1 MD |
1249 | end_put_session: |
1250 | if (session) { | |
1251 | session_put(session); | |
1252 | } | |
80e8027a JD |
1253 | error: |
1254 | return ret; | |
1255 | } | |
1256 | ||
d3e2ba59 JD |
1257 | /* |
1258 | * Send the viewer the list of current sessions. | |
1259 | */ | |
28ab034a | 1260 | static int viewer_attach_session(struct relay_connection *conn) |
d3e2ba59 | 1261 | { |
2f8f53af DG |
1262 | int send_streams = 0; |
1263 | ssize_t ret; | |
80e8027a | 1264 | uint32_t nb_streams = 0; |
2f8f53af | 1265 | enum lttng_viewer_seek seek_type; |
d3e2ba59 JD |
1266 | struct lttng_viewer_attach_session_request request; |
1267 | struct lttng_viewer_attach_session_response response; | |
cd9adb8b | 1268 | struct relay_session *session = nullptr; |
dbd6665b | 1269 | enum lttng_viewer_attach_return_code viewer_attach_status; |
bddf80e4 | 1270 | bool closed = false; |
c06fdd95 | 1271 | uint64_t session_id; |
d3e2ba59 | 1272 | |
a0377dfe | 1273 | LTTNG_ASSERT(conn); |
d3e2ba59 | 1274 | |
eea7556c MD |
1275 | health_code_update(); |
1276 | ||
2f8f53af | 1277 | /* Receive the request from the connected client. */ |
58eb9381 | 1278 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 1279 | if (ret < 0) { |
d3e2ba59 JD |
1280 | goto error; |
1281 | } | |
1282 | ||
c06fdd95 | 1283 | session_id = be64toh(request.session_id); |
07d9fffa | 1284 | |
eea7556c MD |
1285 | health_code_update(); |
1286 | ||
53efb85a MD |
1287 | memset(&response, 0, sizeof(response)); |
1288 | ||
c3b7390b | 1289 | if (!conn->viewer_session) { |
07d9fffa FD |
1290 | viewer_attach_status = LTTNG_VIEWER_ATTACH_NO_SESSION; |
1291 | DBG("Client trying to attach before creating a live viewer session, returning status=%s", | |
28ab034a | 1292 | lttng_viewer_attach_return_code_str(viewer_attach_status)); |
c3b7390b JD |
1293 | goto send_reply; |
1294 | } | |
1295 | ||
c06fdd95 | 1296 | session = session_get_by_id(session_id); |
2f8f53af | 1297 | if (!session) { |
07d9fffa FD |
1298 | viewer_attach_status = LTTNG_VIEWER_ATTACH_UNK; |
1299 | DBG("Relay session %" PRIu64 " not found, returning status=%s", | |
28ab034a JG |
1300 | session_id, |
1301 | lttng_viewer_attach_return_code_str(viewer_attach_status)); | |
d3e2ba59 JD |
1302 | goto send_reply; |
1303 | } | |
07d9fffa | 1304 | DBG("Attach relay session ID %" PRIu64 " received", session_id); |
d3e2ba59 | 1305 | |
c06fdd95 | 1306 | pthread_mutex_lock(&session->lock); |
7591bab1 | 1307 | if (session->live_timer == 0) { |
07d9fffa FD |
1308 | viewer_attach_status = LTTNG_VIEWER_ATTACH_NOT_LIVE; |
1309 | DBG("Relay session ID %" PRIu64 " is not a live session, returning status=%s", | |
28ab034a JG |
1310 | session_id, |
1311 | lttng_viewer_attach_return_code_str(viewer_attach_status)); | |
d3e2ba59 | 1312 | goto send_reply; |
7591bab1 MD |
1313 | } |
1314 | ||
1315 | send_streams = 1; | |
28ab034a | 1316 | viewer_attach_status = viewer_session_attach(conn->viewer_session, session); |
dbd6665b | 1317 | if (viewer_attach_status != LTTNG_VIEWER_ATTACH_OK) { |
07d9fffa | 1318 | DBG("Error attaching to relay session %" PRIu64 ", returning status=%s", |
28ab034a JG |
1319 | session_id, |
1320 | lttng_viewer_attach_return_code_str(viewer_attach_status)); | |
7591bab1 | 1321 | goto send_reply; |
d3e2ba59 JD |
1322 | } |
1323 | ||
1324 | switch (be32toh(request.seek)) { | |
c4e361a4 JD |
1325 | case LTTNG_VIEWER_SEEK_BEGINNING: |
1326 | case LTTNG_VIEWER_SEEK_LAST: | |
07d9fffa | 1327 | viewer_attach_status = LTTNG_VIEWER_ATTACH_OK; |
ac497a37 | 1328 | seek_type = (lttng_viewer_seek) be32toh(request.seek); |
d3e2ba59 JD |
1329 | break; |
1330 | default: | |
28ab034a JG |
1331 | ERR("Wrong seek parameter for relay session %" PRIu64 ", returning status=%s", |
1332 | session_id, | |
1333 | lttng_viewer_attach_return_code_str(viewer_attach_status)); | |
07d9fffa | 1334 | viewer_attach_status = LTTNG_VIEWER_ATTACH_SEEK_ERR; |
d3e2ba59 JD |
1335 | send_streams = 0; |
1336 | goto send_reply; | |
1337 | } | |
1338 | ||
8cd15f6a MD |
1339 | /* |
1340 | * If a session rotation is ongoing, do not attempt to open any | |
1341 | * stream, because the chunk can be in an intermediate state | |
1342 | * due to directory renaming. | |
1343 | */ | |
fe88e517 | 1344 | if (session_has_ongoing_rotation(session)) { |
8cd15f6a MD |
1345 | DBG("Relay session %" PRIu64 " rotation ongoing", session_id); |
1346 | send_streams = 0; | |
1347 | goto send_reply; | |
1348 | } | |
1349 | ||
28ab034a | 1350 | ret = make_viewer_streams( |
cd9adb8b | 1351 | session, conn->viewer_session, seek_type, &nb_streams, nullptr, nullptr, &closed); |
2f8f53af | 1352 | if (ret < 0) { |
7591bab1 | 1353 | goto end_put_session; |
d3e2ba59 | 1354 | } |
c06fdd95 JG |
1355 | pthread_mutex_unlock(&session->lock); |
1356 | session_put(session); | |
cd9adb8b | 1357 | session = nullptr; |
c06fdd95 JG |
1358 | |
1359 | response.streams_count = htobe32(nb_streams); | |
bddf80e4 MD |
1360 | /* |
1361 | * If the session is closed when the viewer is attaching, it | |
1362 | * means some of the streams may have been concurrently removed, | |
1363 | * so we don't allow the viewer to attach, even if there are | |
1364 | * streams available. | |
1365 | */ | |
1366 | if (closed) { | |
1367 | send_streams = 0; | |
1368 | response.streams_count = 0; | |
07d9fffa FD |
1369 | viewer_attach_status = LTTNG_VIEWER_ATTACH_UNK; |
1370 | ERR("Session %" PRIu64 " is closed, returning status=%s", | |
28ab034a JG |
1371 | session_id, |
1372 | lttng_viewer_attach_return_code_str(viewer_attach_status)); | |
bddf80e4 MD |
1373 | goto send_reply; |
1374 | } | |
1375 | ||
d3e2ba59 | 1376 | send_reply: |
eea7556c | 1377 | health_code_update(); |
07d9fffa FD |
1378 | |
1379 | response.status = htobe32((uint32_t) viewer_attach_status); | |
1380 | ||
58eb9381 | 1381 | ret = send_response(conn->sock, &response, sizeof(response)); |
d3e2ba59 | 1382 | if (ret < 0) { |
7591bab1 | 1383 | goto end_put_session; |
d3e2ba59 | 1384 | } |
eea7556c | 1385 | health_code_update(); |
d3e2ba59 JD |
1386 | |
1387 | /* | |
7591bab1 MD |
1388 | * Unknown or empty session, just return gracefully, the viewer |
1389 | * knows what is happening. | |
d3e2ba59 | 1390 | */ |
157df586 | 1391 | if (!send_streams || !nb_streams) { |
d3e2ba59 | 1392 | ret = 0; |
7591bab1 | 1393 | goto end_put_session; |
d3e2ba59 JD |
1394 | } |
1395 | ||
2f8f53af | 1396 | /* Send stream and ignore the sent flag. */ |
c06fdd95 | 1397 | ret = send_viewer_streams(conn->sock, session_id, 1); |
2f8f53af | 1398 | if (ret < 0) { |
7591bab1 | 1399 | goto end_put_session; |
d3e2ba59 | 1400 | } |
d3e2ba59 | 1401 | |
7591bab1 MD |
1402 | end_put_session: |
1403 | if (session) { | |
c06fdd95 | 1404 | pthread_mutex_unlock(&session->lock); |
7591bab1 MD |
1405 | session_put(session); |
1406 | } | |
4a9daf17 JD |
1407 | error: |
1408 | return ret; | |
1409 | } | |
1410 | ||
878c34cf DG |
1411 | /* |
1412 | * Open the index file if needed for the given vstream. | |
1413 | * | |
f8f3885c MD |
1414 | * If an index file is successfully opened, the vstream will set it as its |
1415 | * current index file. | |
878c34cf DG |
1416 | * |
1417 | * Return 0 on success, a negative value on error (-ENOENT if not ready yet). | |
7591bab1 MD |
1418 | * |
1419 | * Called with rstream lock held. | |
878c34cf | 1420 | */ |
28ab034a | 1421 | static int try_open_index(struct relay_viewer_stream *vstream, struct relay_stream *rstream) |
878c34cf DG |
1422 | { |
1423 | int ret = 0; | |
ebb29c10 JG |
1424 | const uint32_t connection_major = rstream->trace->session->major; |
1425 | const uint32_t connection_minor = rstream->trace->session->minor; | |
3ff5c5db | 1426 | enum lttng_trace_chunk_status chunk_status; |
878c34cf | 1427 | |
f8f3885c | 1428 | if (vstream->index_file) { |
878c34cf DG |
1429 | goto end; |
1430 | } | |
1431 | ||
1432 | /* | |
7591bab1 | 1433 | * First time, we open the index file and at least one index is ready. |
878c34cf | 1434 | */ |
28ab034a | 1435 | if (rstream->index_received_seqcount == 0 || !vstream->stream_file.trace_chunk) { |
878c34cf DG |
1436 | ret = -ENOENT; |
1437 | goto end; | |
1438 | } | |
80516611 | 1439 | |
3ff5c5db | 1440 | chunk_status = lttng_index_file_create_from_trace_chunk_read_only( |
28ab034a JG |
1441 | vstream->stream_file.trace_chunk, |
1442 | rstream->path_name, | |
1443 | rstream->channel_name, | |
1444 | rstream->tracefile_size, | |
1445 | vstream->current_tracefile_id, | |
1446 | lttng_to_index_major(connection_major, connection_minor), | |
1447 | lttng_to_index_minor(connection_major, connection_minor), | |
1448 | true, | |
1449 | &vstream->index_file); | |
3ff5c5db MD |
1450 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
1451 | if (chunk_status == LTTNG_TRACE_CHUNK_STATUS_NO_FILE) { | |
1452 | ret = -ENOENT; | |
1453 | } else { | |
1454 | ret = -1; | |
1455 | } | |
878c34cf DG |
1456 | } |
1457 | ||
1458 | end: | |
1459 | return ret; | |
1460 | } | |
1461 | ||
1462 | /* | |
7591bab1 MD |
1463 | * Check the status of the index for the given stream. This function |
1464 | * updates the index structure if needed and can put (close) the vstream | |
1465 | * in the HUP situation. | |
1466 | * | |
1467 | * Return 0 means that we can proceed with the index. A value of 1 means | |
1468 | * that the index has been updated and is ready to be sent to the | |
1469 | * client. A negative value indicates an error that can't be handled. | |
878c34cf | 1470 | * |
7591bab1 | 1471 | * Called with rstream lock held. |
878c34cf DG |
1472 | */ |
1473 | static int check_index_status(struct relay_viewer_stream *vstream, | |
28ab034a JG |
1474 | struct relay_stream *rstream, |
1475 | struct ctf_trace *trace, | |
1476 | struct lttng_viewer_index *index) | |
878c34cf DG |
1477 | { |
1478 | int ret; | |
1479 | ||
68c40154 | 1480 | DBG("Check index status: index_received_seqcount %" PRIu64 " " |
28ab034a JG |
1481 | "index_sent_seqcount %" PRIu64 " " |
1482 | "for stream %" PRIu64, | |
1483 | rstream->index_received_seqcount, | |
1484 | vstream->index_sent_seqcount, | |
1485 | vstream->stream->stream_handle); | |
1486 | if ((trace->session->connection_closed || rstream->closed) && | |
1487 | rstream->index_received_seqcount == vstream->index_sent_seqcount) { | |
797bc362 MD |
1488 | /* |
1489 | * Last index sent and session connection or relay | |
1490 | * stream are closed. | |
1491 | */ | |
7e4fb89b FD |
1492 | index->status = LTTNG_VIEWER_INDEX_HUP; |
1493 | DBG("Check index status: Connection or stream are closed, stream %" PRIu64 | |
28ab034a JG |
1494 | ",connection-closed=%d, relay-stream-closed=%d, returning status=%s", |
1495 | vstream->stream->stream_handle, | |
1496 | trace->session->connection_closed, | |
1497 | rstream->closed, | |
1498 | lttng_viewer_next_index_return_code_str( | |
1499 | (enum lttng_viewer_next_index_return_code) index->status)); | |
7591bab1 MD |
1500 | goto hup; |
1501 | } else if (rstream->beacon_ts_end != -1ULL && | |
28ab034a JG |
1502 | (rstream->index_received_seqcount == 0 || |
1503 | (vstream->index_sent_seqcount != 0 && | |
1504 | rstream->index_received_seqcount <= vstream->index_sent_seqcount))) { | |
7591bab1 MD |
1505 | /* |
1506 | * We've received a synchronization beacon and the last index | |
1507 | * available has been sent, the index for now is inactive. | |
1508 | * | |
1509 | * In this case, we have received a beacon which allows us to | |
1510 | * inform the client of a time interval during which we can | |
1511 | * guarantee that there are no events to read (and never will | |
1512 | * be). | |
b0d240a2 MD |
1513 | * |
1514 | * The sent seqcount can grow higher than receive seqcount on | |
1515 | * clear because the rotation performed by clear will push | |
1516 | * the index_sent_seqcount ahead (see | |
1517 | * viewer_stream_sync_tracefile_array_tail) and skip over | |
1518 | * packet sequence numbers. | |
7591bab1 | 1519 | */ |
7e4fb89b | 1520 | index->status = LTTNG_VIEWER_INDEX_INACTIVE; |
7591bab1 MD |
1521 | index->timestamp_end = htobe64(rstream->beacon_ts_end); |
1522 | index->stream_id = htobe64(rstream->ctf_stream_id); | |
7e4fb89b | 1523 | DBG("Check index status: inactive with beacon, for stream %" PRIu64 |
28ab034a JG |
1524 | ", returning status=%s", |
1525 | vstream->stream->stream_handle, | |
1526 | lttng_viewer_next_index_return_code_str( | |
1527 | (enum lttng_viewer_next_index_return_code) index->status)); | |
7591bab1 | 1528 | goto index_ready; |
b0d240a2 | 1529 | } else if (rstream->index_received_seqcount == 0 || |
28ab034a JG |
1530 | (vstream->index_sent_seqcount != 0 && |
1531 | rstream->index_received_seqcount <= vstream->index_sent_seqcount)) { | |
7591bab1 | 1532 | /* |
b0d240a2 | 1533 | * This checks whether received <= sent seqcount. In |
a44ca2ca MD |
1534 | * this case, we have not received a beacon. Therefore, |
1535 | * we can only ask the client to retry later. | |
b0d240a2 MD |
1536 | * |
1537 | * The sent seqcount can grow higher than receive seqcount on | |
1538 | * clear because the rotation performed by clear will push | |
1539 | * the index_sent_seqcount ahead (see | |
1540 | * viewer_stream_sync_tracefile_array_tail) and skip over | |
1541 | * packet sequence numbers. | |
7591bab1 | 1542 | */ |
7e4fb89b FD |
1543 | index->status = LTTNG_VIEWER_INDEX_RETRY; |
1544 | DBG("Check index status:" | |
28ab034a JG |
1545 | "did not received beacon for stream %" PRIu64 ", returning status=%s", |
1546 | vstream->stream->stream_handle, | |
1547 | lttng_viewer_next_index_return_code_str( | |
1548 | (enum lttng_viewer_next_index_return_code) index->status)); | |
7591bab1 | 1549 | goto index_ready; |
a44ca2ca | 1550 | } else if (!tracefile_array_seq_in_file(rstream->tfa, |
28ab034a JG |
1551 | vstream->current_tracefile_id, |
1552 | vstream->index_sent_seqcount)) { | |
7591bab1 | 1553 | /* |
a44ca2ca MD |
1554 | * The next index we want to send cannot be read either |
1555 | * because we need to perform a rotation, or due to | |
1556 | * the producer having overwritten its trace file. | |
7591bab1 | 1557 | */ |
28ab034a | 1558 | DBG("Viewer stream %" PRIu64 " rotation", vstream->stream->stream_handle); |
7591bab1 | 1559 | ret = viewer_stream_rotate(vstream); |
b0d240a2 | 1560 | if (ret == 1) { |
7591bab1 | 1561 | /* EOF across entire stream. */ |
7e4fb89b FD |
1562 | index->status = LTTNG_VIEWER_INDEX_HUP; |
1563 | DBG("Check index status:" | |
28ab034a JG |
1564 | "reached end of file for stream %" PRIu64 ", returning status=%s", |
1565 | vstream->stream->stream_handle, | |
1566 | lttng_viewer_next_index_return_code_str( | |
1567 | (enum lttng_viewer_next_index_return_code) index->status)); | |
7591bab1 MD |
1568 | goto hup; |
1569 | } | |
7591bab1 | 1570 | /* |
a44ca2ca MD |
1571 | * If we have been pushed due to overwrite, it |
1572 | * necessarily means there is data that can be read in | |
1573 | * the stream. If we rotated because we reached the end | |
1574 | * of a tracefile, it means the following tracefile | |
1575 | * needs to contain at least one index, else we would | |
1576 | * have already returned LTTNG_VIEWER_INDEX_RETRY to the | |
1577 | * viewer. The updated index_sent_seqcount needs to | |
1578 | * point to a readable index entry now. | |
1579 | * | |
1580 | * In the case where we "rotate" on a single file, we | |
1581 | * can end up in a case where the requested index is | |
1582 | * still unavailable. | |
7591bab1 | 1583 | */ |
a44ca2ca | 1584 | if (rstream->tracefile_count == 1 && |
28ab034a JG |
1585 | !tracefile_array_seq_in_file(rstream->tfa, |
1586 | vstream->current_tracefile_id, | |
1587 | vstream->index_sent_seqcount)) { | |
7e4fb89b FD |
1588 | index->status = LTTNG_VIEWER_INDEX_RETRY; |
1589 | DBG("Check index status:" | |
28ab034a JG |
1590 | "tracefile array sequence number %" PRIu64 |
1591 | " not in file for stream %" PRIu64 ", returning status=%s", | |
1592 | vstream->index_sent_seqcount, | |
1593 | vstream->stream->stream_handle, | |
1594 | lttng_viewer_next_index_return_code_str( | |
1595 | (enum lttng_viewer_next_index_return_code) index->status)); | |
a44ca2ca | 1596 | goto index_ready; |
878c34cf | 1597 | } |
28ab034a JG |
1598 | LTTNG_ASSERT(tracefile_array_seq_in_file( |
1599 | rstream->tfa, vstream->current_tracefile_id, vstream->index_sent_seqcount)); | |
878c34cf | 1600 | } |
a44ca2ca MD |
1601 | /* ret == 0 means successful so we continue. */ |
1602 | ret = 0; | |
878c34cf DG |
1603 | return ret; |
1604 | ||
1605 | hup: | |
7591bab1 | 1606 | viewer_stream_put(vstream); |
878c34cf DG |
1607 | index_ready: |
1608 | return 1; | |
1609 | } | |
1610 | ||
28ab034a JG |
1611 | static void viewer_stream_rotate_to_trace_chunk(struct relay_viewer_stream *vstream, |
1612 | struct lttng_trace_chunk *new_trace_chunk) | |
80516611 JG |
1613 | { |
1614 | lttng_trace_chunk_put(vstream->stream_file.trace_chunk); | |
1615 | ||
1616 | if (new_trace_chunk) { | |
28ab034a | 1617 | const bool acquired_reference = lttng_trace_chunk_get(new_trace_chunk); |
80516611 | 1618 | |
a0377dfe | 1619 | LTTNG_ASSERT(acquired_reference); |
80516611 JG |
1620 | } |
1621 | ||
1622 | vstream->stream_file.trace_chunk = new_trace_chunk; | |
1623 | viewer_stream_sync_tracefile_array_tail(vstream); | |
1624 | viewer_stream_close_files(vstream); | |
1625 | } | |
1626 | ||
d3e2ba59 JD |
1627 | /* |
1628 | * Send the next index for a stream. | |
1629 | * | |
1630 | * Return 0 on success or else a negative value. | |
1631 | */ | |
28ab034a | 1632 | static int viewer_get_next_index(struct relay_connection *conn) |
d3e2ba59 JD |
1633 | { |
1634 | int ret; | |
1635 | struct lttng_viewer_get_next_index request_index; | |
1636 | struct lttng_viewer_index viewer_index; | |
50adc264 | 1637 | struct ctf_packet_index packet_index; |
cd9adb8b JG |
1638 | struct relay_viewer_stream *vstream = nullptr; |
1639 | struct relay_stream *rstream = nullptr; | |
1640 | struct ctf_trace *ctf_trace = nullptr; | |
1641 | struct relay_viewer_stream *metadata_viewer_stream = nullptr; | |
bb1dcf01 MD |
1642 | bool viewer_stream_and_session_in_same_chunk, viewer_stream_one_rotation_behind; |
1643 | uint64_t stream_file_chunk_id = -1ULL, viewer_session_chunk_id = -1ULL; | |
1644 | enum lttng_trace_chunk_status status; | |
d3e2ba59 | 1645 | |
a0377dfe | 1646 | LTTNG_ASSERT(conn); |
d3e2ba59 | 1647 | |
7591bab1 | 1648 | memset(&viewer_index, 0, sizeof(viewer_index)); |
eea7556c | 1649 | health_code_update(); |
2f8f53af | 1650 | |
58eb9381 | 1651 | ret = recv_request(conn->sock, &request_index, sizeof(request_index)); |
2f8f53af | 1652 | if (ret < 0) { |
d3e2ba59 JD |
1653 | goto end; |
1654 | } | |
eea7556c | 1655 | health_code_update(); |
d3e2ba59 | 1656 | |
7591bab1 | 1657 | vstream = viewer_stream_get_by_id(be64toh(request_index.stream_id)); |
6763619c | 1658 | if (!vstream) { |
7e4fb89b | 1659 | viewer_index.status = LTTNG_VIEWER_INDEX_ERR; |
28ab034a JG |
1660 | DBG("Client requested index of unknown stream id %" PRIu64 ", returning status=%s", |
1661 | (uint64_t) be64toh(request_index.stream_id), | |
1662 | lttng_viewer_next_index_return_code_str( | |
1663 | (enum lttng_viewer_next_index_return_code) viewer_index.status)); | |
f1883937 | 1664 | goto send_reply; |
2a174661 DG |
1665 | } |
1666 | ||
7591bab1 MD |
1667 | /* Use back. ref. Protected by refcounts. */ |
1668 | rstream = vstream->stream; | |
1669 | ctf_trace = rstream->trace; | |
d3e2ba59 | 1670 | |
7591bab1 | 1671 | /* metadata_viewer_stream may be NULL. */ |
28ab034a | 1672 | metadata_viewer_stream = ctf_trace_get_viewer_metadata_stream(ctf_trace); |
2a174661 | 1673 | |
b6ae2a95 MD |
1674 | /* |
1675 | * Hold the session lock to protect against concurrent changes | |
1676 | * to the chunk files (e.g. rename done by clear), which are | |
1677 | * protected by the session ongoing rotation state. Those are | |
1678 | * synchronized with the session lock. | |
1679 | */ | |
1680 | pthread_mutex_lock(&rstream->trace->session->lock); | |
7591bab1 | 1681 | pthread_mutex_lock(&rstream->lock); |
d3e2ba59 JD |
1682 | |
1683 | /* | |
1684 | * The viewer should not ask for index on metadata stream. | |
1685 | */ | |
7591bab1 | 1686 | if (rstream->is_metadata) { |
7e4fb89b | 1687 | viewer_index.status = LTTNG_VIEWER_INDEX_HUP; |
28ab034a JG |
1688 | DBG("Client requested index of a metadata stream id %" PRIu64 |
1689 | ", returning status=%s", | |
1690 | (uint64_t) be64toh(request_index.stream_id), | |
1691 | lttng_viewer_next_index_return_code_str( | |
1692 | (enum lttng_viewer_next_index_return_code) viewer_index.status)); | |
d3e2ba59 JD |
1693 | goto send_reply; |
1694 | } | |
1695 | ||
b0d240a2 MD |
1696 | if (rstream->ongoing_rotation.is_set) { |
1697 | /* Rotation is ongoing, try again later. */ | |
7e4fb89b | 1698 | viewer_index.status = LTTNG_VIEWER_INDEX_RETRY; |
28ab034a JG |
1699 | DBG("Client requested index for stream id %" PRIu64 |
1700 | " while a stream rotation is ongoing, returning status=%s", | |
1701 | (uint64_t) be64toh(request_index.stream_id), | |
1702 | lttng_viewer_next_index_return_code_str( | |
1703 | (enum lttng_viewer_next_index_return_code) viewer_index.status)); | |
b0d240a2 MD |
1704 | goto send_reply; |
1705 | } | |
1706 | ||
fe88e517 | 1707 | if (session_has_ongoing_rotation(rstream->trace->session)) { |
b0d240a2 | 1708 | /* Rotation is ongoing, try again later. */ |
7e4fb89b | 1709 | viewer_index.status = LTTNG_VIEWER_INDEX_RETRY; |
28ab034a JG |
1710 | DBG("Client requested index for stream id %" PRIu64 |
1711 | " while a session rotation is ongoing, returning status=%s", | |
1712 | (uint64_t) be64toh(request_index.stream_id), | |
1713 | lttng_viewer_next_index_return_code_str( | |
1714 | (enum lttng_viewer_next_index_return_code) viewer_index.status)); | |
b0d240a2 MD |
1715 | goto send_reply; |
1716 | } | |
1717 | ||
80516611 JG |
1718 | /* |
1719 | * Transition the viewer session into the newest trace chunk available. | |
1720 | */ | |
28ab034a JG |
1721 | if (!lttng_trace_chunk_ids_equal(conn->viewer_session->current_trace_chunk, |
1722 | rstream->trace_chunk)) { | |
9a9c8637 | 1723 | DBG("Relay stream and viewer chunk ids differ"); |
b0d240a2 | 1724 | |
28ab034a JG |
1725 | ret = viewer_session_set_trace_chunk_copy(conn->viewer_session, |
1726 | rstream->trace_chunk); | |
ad8bec24 | 1727 | if (ret) { |
7e4fb89b FD |
1728 | viewer_index.status = LTTNG_VIEWER_INDEX_ERR; |
1729 | ERR("Error copying trace chunk for stream id %" PRIu64 | |
28ab034a JG |
1730 | ", returning status=%s", |
1731 | (uint64_t) be64toh(request_index.stream_id), | |
1732 | lttng_viewer_next_index_return_code_str( | |
1733 | (enum lttng_viewer_next_index_return_code) viewer_index.status)); | |
b0d240a2 MD |
1734 | goto send_reply; |
1735 | } | |
b0d240a2 | 1736 | } |
b0d240a2 | 1737 | |
80516611 JG |
1738 | /* |
1739 | * Transition the viewer stream into the latest trace chunk available. | |
1740 | * | |
1741 | * Note that the stream must _not_ rotate in one precise condition: | |
1742 | * the relay stream has rotated to a NULL trace chunk and the viewer | |
1743 | * stream is consuming the trace chunk that was active just before | |
1744 | * that rotation to NULL. | |
1745 | * | |
1746 | * This allows clients to consume all the packets of a trace chunk | |
1747 | * after a session's destruction. | |
1748 | */ | |
bb1dcf01 | 1749 | if (vstream->stream_file.trace_chunk) { |
28ab034a JG |
1750 | status = lttng_trace_chunk_get_id(vstream->stream_file.trace_chunk, |
1751 | &stream_file_chunk_id); | |
bb1dcf01 MD |
1752 | LTTNG_ASSERT(status == LTTNG_TRACE_CHUNK_STATUS_OK); |
1753 | } | |
1754 | if (conn->viewer_session->current_trace_chunk) { | |
28ab034a JG |
1755 | status = lttng_trace_chunk_get_id(conn->viewer_session->current_trace_chunk, |
1756 | &viewer_session_chunk_id); | |
bb1dcf01 MD |
1757 | LTTNG_ASSERT(status == LTTNG_TRACE_CHUNK_STATUS_OK); |
1758 | } | |
1759 | ||
1760 | viewer_stream_and_session_in_same_chunk = lttng_trace_chunk_ids_equal( | |
28ab034a | 1761 | conn->viewer_session->current_trace_chunk, vstream->stream_file.trace_chunk); |
bb1dcf01 | 1762 | viewer_stream_one_rotation_behind = rstream->completed_rotation_count == |
28ab034a | 1763 | vstream->last_seen_rotation_count + 1; |
bb1dcf01 MD |
1764 | |
1765 | if (viewer_stream_and_session_in_same_chunk) { | |
1766 | DBG("Transition to latest chunk check (%s -> %s): Same chunk, no need to rotate", | |
28ab034a JG |
1767 | vstream->stream_file.trace_chunk ? |
1768 | std::to_string(stream_file_chunk_id).c_str() : | |
1769 | "None", | |
1770 | conn->viewer_session->current_trace_chunk ? | |
1771 | std::to_string(viewer_session_chunk_id).c_str() : | |
1772 | "None"); | |
bb1dcf01 MD |
1773 | } else if (viewer_stream_one_rotation_behind && !rstream->trace_chunk) { |
1774 | DBG("Transition to latest chunk check (%s -> %s): One chunk behind relay stream which is being destroyed, no need to rotate", | |
28ab034a JG |
1775 | vstream->stream_file.trace_chunk ? |
1776 | std::to_string(stream_file_chunk_id).c_str() : | |
1777 | "None", | |
1778 | conn->viewer_session->current_trace_chunk ? | |
1779 | std::to_string(viewer_session_chunk_id).c_str() : | |
1780 | "None"); | |
bb1dcf01 MD |
1781 | } else { |
1782 | DBG("Transition to latest chunk check (%s -> %s): Viewer stream chunk ID and viewer session chunk ID differ, rotating viewer stream", | |
28ab034a JG |
1783 | vstream->stream_file.trace_chunk ? |
1784 | std::to_string(stream_file_chunk_id).c_str() : | |
1785 | "None", | |
1786 | conn->viewer_session->current_trace_chunk ? | |
1787 | std::to_string(viewer_session_chunk_id).c_str() : | |
1788 | "None"); | |
bb1dcf01 | 1789 | |
80516611 | 1790 | viewer_stream_rotate_to_trace_chunk(vstream, |
28ab034a JG |
1791 | conn->viewer_session->current_trace_chunk); |
1792 | vstream->last_seen_rotation_count = rstream->completed_rotation_count; | |
d3e2ba59 JD |
1793 | } |
1794 | ||
878c34cf | 1795 | ret = check_index_status(vstream, rstream, ctf_trace, &viewer_index); |
878c34cf | 1796 | if (ret < 0) { |
7591bab1 | 1797 | goto error_put; |
878c34cf DG |
1798 | } else if (ret == 1) { |
1799 | /* | |
7591bab1 MD |
1800 | * We have no index to send and check_index_status has populated |
1801 | * viewer_index's status. | |
878c34cf | 1802 | */ |
d3e2ba59 JD |
1803 | goto send_reply; |
1804 | } | |
7591bab1 | 1805 | /* At this point, ret is 0 thus we will be able to read the index. */ |
a0377dfe | 1806 | LTTNG_ASSERT(!ret); |
d3e2ba59 | 1807 | |
b0d240a2 MD |
1808 | /* Try to open an index if one is needed for that stream. */ |
1809 | ret = try_open_index(vstream, rstream); | |
1810 | if (ret == -ENOENT) { | |
28ab034a | 1811 | if (rstream->closed) { |
7e4fb89b FD |
1812 | viewer_index.status = LTTNG_VIEWER_INDEX_HUP; |
1813 | DBG("Cannot open index for stream id %" PRIu64 | |
28ab034a JG |
1814 | "stream is closed, returning status=%s", |
1815 | (uint64_t) be64toh(request_index.stream_id), | |
1816 | lttng_viewer_next_index_return_code_str( | |
1817 | (enum lttng_viewer_next_index_return_code) viewer_index.status)); | |
b0d240a2 | 1818 | goto send_reply; |
28ab034a | 1819 | } else { |
7e4fb89b | 1820 | viewer_index.status = LTTNG_VIEWER_INDEX_RETRY; |
28ab034a JG |
1821 | DBG("Cannot open index for stream id %" PRIu64 ", returning status=%s", |
1822 | (uint64_t) be64toh(request_index.stream_id), | |
1823 | lttng_viewer_next_index_return_code_str( | |
1824 | (enum lttng_viewer_next_index_return_code) viewer_index.status)); | |
b0d240a2 | 1825 | goto send_reply; |
28ab034a | 1826 | } |
b0d240a2 MD |
1827 | } |
1828 | if (ret < 0) { | |
7e4fb89b | 1829 | viewer_index.status = LTTNG_VIEWER_INDEX_ERR; |
28ab034a JG |
1830 | ERR("Error opening index for stream id %" PRIu64 ", returning status=%s", |
1831 | (uint64_t) be64toh(request_index.stream_id), | |
1832 | lttng_viewer_next_index_return_code_str( | |
1833 | (enum lttng_viewer_next_index_return_code) viewer_index.status)); | |
b0d240a2 MD |
1834 | goto send_reply; |
1835 | } | |
1836 | ||
7591bab1 MD |
1837 | /* |
1838 | * vstream->stream_fd may be NULL if it has been closed by | |
1839 | * tracefile rotation, or if we are at the beginning of the | |
1840 | * stream. We open the data stream file here to protect against | |
1841 | * overwrite caused by tracefile rotation (in association with | |
1842 | * unlink performed before overwrite). | |
1843 | */ | |
8bb66c3c | 1844 | if (!vstream->stream_file.handle) { |
ebb29c10 | 1845 | char file_path[LTTNG_PATH_MAX]; |
8bb66c3c | 1846 | struct fs_handle *fs_handle; |
ebb29c10 JG |
1847 | |
1848 | ret = utils_stream_file_path(rstream->path_name, | |
28ab034a JG |
1849 | rstream->channel_name, |
1850 | rstream->tracefile_size, | |
1851 | vstream->current_tracefile_id, | |
cd9adb8b | 1852 | nullptr, |
28ab034a JG |
1853 | file_path, |
1854 | sizeof(file_path)); | |
7591bab1 MD |
1855 | if (ret < 0) { |
1856 | goto error_put; | |
1857 | } | |
ebb29c10 | 1858 | |
3ff5c5db MD |
1859 | /* |
1860 | * It is possible the the file we are trying to open is | |
1861 | * missing if the stream has been closed (application exits with | |
1862 | * per-pid buffers) and a clear command has been performed. | |
1863 | */ | |
8bb66c3c | 1864 | status = lttng_trace_chunk_open_fs_handle( |
28ab034a | 1865 | vstream->stream_file.trace_chunk, file_path, O_RDONLY, 0, &fs_handle, true); |
ebb29c10 | 1866 | if (status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
28ab034a | 1867 | if (status == LTTNG_TRACE_CHUNK_STATUS_NO_FILE && rstream->closed) { |
7e4fb89b FD |
1868 | viewer_index.status = LTTNG_VIEWER_INDEX_HUP; |
1869 | DBG("Cannot find trace chunk file and stream is closed for stream id %" PRIu64 | |
28ab034a JG |
1870 | ", returning status=%s", |
1871 | (uint64_t) be64toh(request_index.stream_id), | |
1872 | lttng_viewer_next_index_return_code_str( | |
1873 | (enum lttng_viewer_next_index_return_code) | |
1874 | viewer_index.status)); | |
b0d240a2 MD |
1875 | goto send_reply; |
1876 | } | |
ebb29c10 | 1877 | PERROR("Failed to open trace file for viewer stream"); |
7591bab1 MD |
1878 | goto error_put; |
1879 | } | |
8bb66c3c | 1880 | vstream->stream_file.handle = fs_handle; |
d3e2ba59 JD |
1881 | } |
1882 | ||
f04a971b | 1883 | ret = check_new_streams(conn); |
4a9daf17 | 1884 | if (ret < 0) { |
7e4fb89b FD |
1885 | viewer_index.status = LTTNG_VIEWER_INDEX_ERR; |
1886 | ERR("Error checking for new streams before sending new index to stream id %" PRIu64 | |
28ab034a JG |
1887 | ", returning status=%s", |
1888 | (uint64_t) be64toh(request_index.stream_id), | |
1889 | lttng_viewer_next_index_return_code_str( | |
1890 | (enum lttng_viewer_next_index_return_code) viewer_index.status)); | |
7591bab1 | 1891 | goto send_reply; |
4a9daf17 JD |
1892 | } else if (ret == 1) { |
1893 | viewer_index.flags |= LTTNG_VIEWER_FLAG_NEW_STREAM; | |
1894 | } | |
1895 | ||
f8f3885c MD |
1896 | ret = lttng_index_file_read(vstream->index_file, &packet_index); |
1897 | if (ret) { | |
7e4fb89b | 1898 | viewer_index.status = LTTNG_VIEWER_INDEX_ERR; |
28ab034a JG |
1899 | ERR("Relay error reading index file for stream id %" PRIu64 ", returning status=%s", |
1900 | (uint64_t) be64toh(request_index.stream_id), | |
1901 | lttng_viewer_next_index_return_code_str( | |
1902 | (enum lttng_viewer_next_index_return_code) viewer_index.status)); | |
6b6b9a5a | 1903 | goto send_reply; |
d3e2ba59 | 1904 | } else { |
7e4fb89b | 1905 | viewer_index.status = LTTNG_VIEWER_INDEX_OK; |
28ab034a JG |
1906 | DBG("Read index file for stream id %" PRIu64 ", returning status=%s", |
1907 | (uint64_t) be64toh(request_index.stream_id), | |
1908 | lttng_viewer_next_index_return_code_str( | |
1909 | (enum lttng_viewer_next_index_return_code) viewer_index.status)); | |
a44ca2ca | 1910 | vstream->index_sent_seqcount++; |
d3e2ba59 JD |
1911 | } |
1912 | ||
1913 | /* | |
1914 | * Indexes are stored in big endian, no need to switch before sending. | |
1915 | */ | |
7591bab1 | 1916 | DBG("Sending viewer index for stream %" PRIu64 " offset %" PRIu64, |
28ab034a JG |
1917 | rstream->stream_handle, |
1918 | (uint64_t) be64toh(packet_index.offset)); | |
d3e2ba59 JD |
1919 | viewer_index.offset = packet_index.offset; |
1920 | viewer_index.packet_size = packet_index.packet_size; | |
1921 | viewer_index.content_size = packet_index.content_size; | |
1922 | viewer_index.timestamp_begin = packet_index.timestamp_begin; | |
1923 | viewer_index.timestamp_end = packet_index.timestamp_end; | |
1924 | viewer_index.events_discarded = packet_index.events_discarded; | |
1925 | viewer_index.stream_id = packet_index.stream_id; | |
1926 | ||
1927 | send_reply: | |
f1883937 MD |
1928 | if (rstream) { |
1929 | pthread_mutex_unlock(&rstream->lock); | |
b6ae2a95 | 1930 | pthread_mutex_unlock(&rstream->trace->session->lock); |
f1883937 | 1931 | } |
7591bab1 MD |
1932 | |
1933 | if (metadata_viewer_stream) { | |
1934 | pthread_mutex_lock(&metadata_viewer_stream->stream->lock); | |
28ab034a JG |
1935 | DBG("get next index metadata check: recv %" PRIu64 " sent %" PRIu64, |
1936 | metadata_viewer_stream->stream->metadata_received, | |
1937 | metadata_viewer_stream->metadata_sent); | |
7591bab1 | 1938 | if (!metadata_viewer_stream->stream->metadata_received || |
28ab034a JG |
1939 | metadata_viewer_stream->stream->metadata_received > |
1940 | metadata_viewer_stream->metadata_sent) { | |
7591bab1 MD |
1941 | viewer_index.flags |= LTTNG_VIEWER_FLAG_NEW_METADATA; |
1942 | } | |
1943 | pthread_mutex_unlock(&metadata_viewer_stream->stream->lock); | |
1944 | } | |
1945 | ||
d3e2ba59 | 1946 | viewer_index.flags = htobe32(viewer_index.flags); |
7e4fb89b | 1947 | viewer_index.status = htobe32(viewer_index.status); |
eea7556c | 1948 | health_code_update(); |
2f8f53af | 1949 | |
58eb9381 | 1950 | ret = send_response(conn->sock, &viewer_index, sizeof(viewer_index)); |
d3e2ba59 | 1951 | if (ret < 0) { |
7591bab1 | 1952 | goto end; |
d3e2ba59 | 1953 | } |
eea7556c | 1954 | health_code_update(); |
d3e2ba59 | 1955 | |
9237e6a1 MD |
1956 | if (vstream) { |
1957 | DBG("Index %" PRIu64 " for stream %" PRIu64 " sent", | |
28ab034a JG |
1958 | vstream->index_sent_seqcount, |
1959 | vstream->stream->stream_handle); | |
9237e6a1 | 1960 | } |
d3e2ba59 | 1961 | end: |
7591bab1 MD |
1962 | if (metadata_viewer_stream) { |
1963 | viewer_stream_put(metadata_viewer_stream); | |
1964 | } | |
1965 | if (vstream) { | |
1966 | viewer_stream_put(vstream); | |
1967 | } | |
1968 | return ret; | |
1969 | ||
1970 | error_put: | |
1971 | pthread_mutex_unlock(&rstream->lock); | |
b6ae2a95 | 1972 | pthread_mutex_unlock(&rstream->trace->session->lock); |
7591bab1 MD |
1973 | if (metadata_viewer_stream) { |
1974 | viewer_stream_put(metadata_viewer_stream); | |
1975 | } | |
1976 | viewer_stream_put(vstream); | |
d3e2ba59 JD |
1977 | return ret; |
1978 | } | |
1979 | ||
1980 | /* | |
1981 | * Send the next index for a stream | |
1982 | * | |
1983 | * Return 0 on success or else a negative value. | |
1984 | */ | |
28ab034a | 1985 | static int viewer_get_packet(struct relay_connection *conn) |
d3e2ba59 | 1986 | { |
b6025e94 | 1987 | int ret; |
a5df8828 | 1988 | off_t lseek_ret; |
cd9adb8b | 1989 | char *reply = nullptr; |
d3e2ba59 | 1990 | struct lttng_viewer_get_packet get_packet_info; |
553b2adb | 1991 | struct lttng_viewer_trace_packet reply_header; |
cd9adb8b | 1992 | struct relay_viewer_stream *vstream = nullptr; |
553b2adb | 1993 | uint32_t reply_size = sizeof(reply_header); |
b6025e94 JR |
1994 | uint32_t packet_data_len = 0; |
1995 | ssize_t read_len; | |
8bb66c3c | 1996 | uint64_t stream_id; |
556d5fae | 1997 | enum lttng_viewer_get_packet_return_code get_packet_status; |
d3e2ba59 | 1998 | |
eea7556c | 1999 | health_code_update(); |
2f8f53af | 2000 | |
28ab034a | 2001 | ret = recv_request(conn->sock, &get_packet_info, sizeof(get_packet_info)); |
2f8f53af | 2002 | if (ret < 0) { |
d3e2ba59 JD |
2003 | goto end; |
2004 | } | |
eea7556c | 2005 | health_code_update(); |
d3e2ba59 | 2006 | |
0233a6a5 | 2007 | /* From this point on, the error label can be reached. */ |
553b2adb | 2008 | memset(&reply_header, 0, sizeof(reply_header)); |
8bb66c3c | 2009 | stream_id = (uint64_t) be64toh(get_packet_info.stream_id); |
0233a6a5 | 2010 | |
8bb66c3c | 2011 | vstream = viewer_stream_get_by_id(stream_id); |
7591bab1 | 2012 | if (!vstream) { |
556d5fae | 2013 | get_packet_status = LTTNG_VIEWER_GET_PACKET_ERR; |
28ab034a JG |
2014 | DBG("Client requested packet of unknown stream id %" PRIu64 ", returning status=%s", |
2015 | stream_id, | |
2016 | lttng_viewer_get_packet_return_code_str(get_packet_status)); | |
553b2adb | 2017 | goto send_reply_nolock; |
b6025e94 JR |
2018 | } else { |
2019 | packet_data_len = be32toh(get_packet_info.len); | |
553b2adb | 2020 | reply_size += packet_data_len; |
d3e2ba59 | 2021 | } |
2a174661 | 2022 | |
64803277 | 2023 | reply = zmalloc<char>(reply_size); |
553b2adb | 2024 | if (!reply) { |
556d5fae FD |
2025 | get_packet_status = LTTNG_VIEWER_GET_PACKET_ERR; |
2026 | PERROR("Falled to allocate reply, returning status=%s", | |
28ab034a | 2027 | lttng_viewer_get_packet_return_code_str(get_packet_status)); |
d3e2ba59 JD |
2028 | goto error; |
2029 | } | |
2030 | ||
b6025e94 | 2031 | pthread_mutex_lock(&vstream->stream->lock); |
28ab034a JG |
2032 | lseek_ret = fs_handle_seek( |
2033 | vstream->stream_file.handle, be64toh(get_packet_info.offset), SEEK_SET); | |
a5df8828 | 2034 | if (lseek_ret < 0) { |
556d5fae | 2035 | get_packet_status = LTTNG_VIEWER_GET_PACKET_ERR; |
8bb66c3c | 2036 | PERROR("Failed to seek file system handle of viewer stream %" PRIu64 |
28ab034a JG |
2037 | " to offset %" PRIu64 ", returning status=%s", |
2038 | stream_id, | |
2039 | (uint64_t) be64toh(get_packet_info.offset), | |
2040 | lttng_viewer_get_packet_return_code_str(get_packet_status)); | |
7591bab1 | 2041 | goto error; |
d3e2ba59 | 2042 | } |
28ab034a JG |
2043 | read_len = fs_handle_read( |
2044 | vstream->stream_file.handle, reply + sizeof(reply_header), packet_data_len); | |
b6025e94 | 2045 | if (read_len < packet_data_len) { |
556d5fae | 2046 | get_packet_status = LTTNG_VIEWER_GET_PACKET_ERR; |
8bb66c3c | 2047 | PERROR("Failed to read from file system handle of viewer stream id %" PRIu64 |
28ab034a JG |
2048 | ", offset: %" PRIu64 ", returning status=%s", |
2049 | stream_id, | |
556d5fae | 2050 | (uint64_t) be64toh(get_packet_info.offset), |
28ab034a | 2051 | lttng_viewer_get_packet_return_code_str(get_packet_status)); |
7591bab1 | 2052 | goto error; |
d3e2ba59 | 2053 | } |
556d5fae FD |
2054 | |
2055 | get_packet_status = LTTNG_VIEWER_GET_PACKET_OK; | |
553b2adb | 2056 | reply_header.len = htobe32(packet_data_len); |
d3e2ba59 JD |
2057 | goto send_reply; |
2058 | ||
2059 | error: | |
f28ecb10 JG |
2060 | /* No payload to send on error. */ |
2061 | reply_size = sizeof(reply_header); | |
d3e2ba59 JD |
2062 | |
2063 | send_reply: | |
7591bab1 MD |
2064 | if (vstream) { |
2065 | pthread_mutex_unlock(&vstream->stream->lock); | |
2066 | } | |
2067 | send_reply_nolock: | |
eea7556c MD |
2068 | |
2069 | health_code_update(); | |
2f8f53af | 2070 | |
556d5fae | 2071 | reply_header.status = htobe32(get_packet_status); |
553b2adb JG |
2072 | if (reply) { |
2073 | memcpy(reply, &reply_header, sizeof(reply_header)); | |
2074 | ret = send_response(conn->sock, reply, reply_size); | |
2075 | } else { | |
2076 | /* No reply to send. */ | |
28ab034a | 2077 | ret = send_response(conn->sock, &reply_header, reply_size); |
553b2adb JG |
2078 | } |
2079 | ||
b6025e94 | 2080 | health_code_update(); |
d3e2ba59 | 2081 | if (ret < 0) { |
b6025e94 | 2082 | PERROR("sendmsg of packet data failed"); |
7591bab1 | 2083 | goto end_free; |
d3e2ba59 | 2084 | } |
d3e2ba59 | 2085 | |
8bb66c3c | 2086 | DBG("Sent %u bytes for stream %" PRIu64, reply_size, stream_id); |
d3e2ba59 | 2087 | |
7591bab1 | 2088 | end_free: |
553b2adb | 2089 | free(reply); |
d3e2ba59 | 2090 | end: |
7591bab1 MD |
2091 | if (vstream) { |
2092 | viewer_stream_put(vstream); | |
2093 | } | |
d3e2ba59 JD |
2094 | return ret; |
2095 | } | |
2096 | ||
2097 | /* | |
2098 | * Send the session's metadata | |
2099 | * | |
2100 | * Return 0 on success else a negative value. | |
2101 | */ | |
28ab034a | 2102 | static int viewer_get_metadata(struct relay_connection *conn) |
d3e2ba59 JD |
2103 | { |
2104 | int ret = 0; | |
8bb66c3c | 2105 | int fd = -1; |
d3e2ba59 JD |
2106 | ssize_t read_len; |
2107 | uint64_t len = 0; | |
cd9adb8b | 2108 | char *data = nullptr; |
d3e2ba59 JD |
2109 | struct lttng_viewer_get_metadata request; |
2110 | struct lttng_viewer_metadata_packet reply; | |
cd9adb8b | 2111 | struct relay_viewer_stream *vstream = nullptr; |
d3e2ba59 | 2112 | |
a0377dfe | 2113 | LTTNG_ASSERT(conn); |
d3e2ba59 | 2114 | |
eea7556c | 2115 | health_code_update(); |
2f8f53af | 2116 | |
58eb9381 | 2117 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 2118 | if (ret < 0) { |
d3e2ba59 JD |
2119 | goto end; |
2120 | } | |
eea7556c | 2121 | health_code_update(); |
d3e2ba59 | 2122 | |
53efb85a MD |
2123 | memset(&reply, 0, sizeof(reply)); |
2124 | ||
7591bab1 MD |
2125 | vstream = viewer_stream_get_by_id(be64toh(request.stream_id)); |
2126 | if (!vstream) { | |
3b463131 MD |
2127 | /* |
2128 | * The metadata stream can be closed by a CLOSE command | |
2129 | * just before we attach. It can also be closed by | |
2130 | * per-pid tracing during tracing. Therefore, it is | |
2131 | * possible that we cannot find this viewer stream. | |
2132 | * Reply back to the client with an error if we cannot | |
2133 | * find it. | |
2134 | */ | |
a44ca2ca | 2135 | DBG("Client requested metadata of unknown stream id %" PRIu64, |
28ab034a | 2136 | (uint64_t) be64toh(request.stream_id)); |
3b463131 | 2137 | reply.status = htobe32(LTTNG_VIEWER_METADATA_ERR); |
7591bab1 | 2138 | goto send_reply; |
d3e2ba59 | 2139 | } |
7591bab1 MD |
2140 | pthread_mutex_lock(&vstream->stream->lock); |
2141 | if (!vstream->stream->is_metadata) { | |
2142 | ERR("Invalid metadata stream"); | |
6763619c JD |
2143 | goto error; |
2144 | } | |
2145 | ||
b0d240a2 | 2146 | if (vstream->metadata_sent >= vstream->stream->metadata_received) { |
94f73d08 MD |
2147 | /* |
2148 | * The live viewers expect to receive a NO_NEW_METADATA | |
2149 | * status before a stream disappears, otherwise they abort the | |
2150 | * entire live connection when receiving an error status. | |
b0d240a2 MD |
2151 | * |
2152 | * Clear feature resets the metadata_sent to 0 until the | |
2153 | * same metadata is received again. | |
94f73d08 | 2154 | */ |
c4e361a4 | 2155 | reply.status = htobe32(LTTNG_VIEWER_NO_NEW_METADATA); |
94f73d08 MD |
2156 | /* |
2157 | * The live viewer considers a closed 0 byte metadata stream as | |
2158 | * an error. | |
2159 | */ | |
2160 | if (vstream->metadata_sent > 0) { | |
e8b269fa | 2161 | if (vstream->stream->closed && vstream->stream->no_new_metadata_notified) { |
8f141dbd JG |
2162 | /* |
2163 | * Release ownership for the viewer metadata | |
2164 | * stream. Note that this reference is the | |
2165 | * viewer's reference. The vstream still exists | |
2166 | * until the end of the function as | |
2167 | * viewer_stream_get_by_id() took a reference. | |
2168 | */ | |
94f73d08 MD |
2169 | viewer_stream_put(vstream); |
2170 | } | |
8f141dbd | 2171 | |
e8b269fa | 2172 | vstream->stream->no_new_metadata_notified = true; |
94f73d08 | 2173 | } |
d3e2ba59 JD |
2174 | goto send_reply; |
2175 | } | |
2176 | ||
ad8bec24 | 2177 | if (vstream->stream->trace_chunk && |
28ab034a JG |
2178 | !lttng_trace_chunk_ids_equal(conn->viewer_session->current_trace_chunk, |
2179 | vstream->stream->trace_chunk)) { | |
ad8bec24 JG |
2180 | /* A rotation has occurred on the relay stream. */ |
2181 | DBG("Metadata relay stream and viewer chunk ids differ"); | |
2182 | ||
28ab034a JG |
2183 | ret = viewer_session_set_trace_chunk_copy(conn->viewer_session, |
2184 | vstream->stream->trace_chunk); | |
ad8bec24 JG |
2185 | if (ret) { |
2186 | reply.status = htobe32(LTTNG_VIEWER_METADATA_ERR); | |
2187 | goto send_reply; | |
2188 | } | |
2189 | } | |
2190 | ||
87250ba1 | 2191 | if (conn->viewer_session->current_trace_chunk && |
28ab034a JG |
2192 | !lttng_trace_chunk_ids_equal(conn->viewer_session->current_trace_chunk, |
2193 | vstream->stream_file.trace_chunk)) { | |
ad8bec24 JG |
2194 | bool acquired_reference; |
2195 | ||
2196 | DBG("Viewer session and viewer stream chunk differ: " | |
28ab034a JG |
2197 | "vsession chunk %p vstream chunk %p", |
2198 | conn->viewer_session->current_trace_chunk, | |
2199 | vstream->stream_file.trace_chunk); | |
ad8bec24 | 2200 | lttng_trace_chunk_put(vstream->stream_file.trace_chunk); |
28ab034a JG |
2201 | acquired_reference = |
2202 | lttng_trace_chunk_get(conn->viewer_session->current_trace_chunk); | |
a0377dfe | 2203 | LTTNG_ASSERT(acquired_reference); |
28ab034a | 2204 | vstream->stream_file.trace_chunk = conn->viewer_session->current_trace_chunk; |
ad8bec24 JG |
2205 | viewer_stream_close_files(vstream); |
2206 | } | |
2207 | ||
b0d240a2 MD |
2208 | len = vstream->stream->metadata_received - vstream->metadata_sent; |
2209 | ||
87250ba1 JG |
2210 | if (!vstream->stream_file.trace_chunk) { |
2211 | reply.status = htobe32(LTTNG_VIEWER_NO_NEW_METADATA); | |
2212 | len = 0; | |
2213 | goto send_reply; | |
28ab034a | 2214 | } else if (vstream->stream_file.trace_chunk && !vstream->stream_file.handle && len > 0) { |
87250ba1 JG |
2215 | /* |
2216 | * Either this is the first time the metadata file is read, or a | |
2217 | * rotation of the corresponding relay stream has occurred. | |
2218 | */ | |
8bb66c3c | 2219 | struct fs_handle *fs_handle; |
ebb29c10 JG |
2220 | char file_path[LTTNG_PATH_MAX]; |
2221 | enum lttng_trace_chunk_status status; | |
2222 | struct relay_stream *rstream = vstream->stream; | |
2223 | ||
2224 | ret = utils_stream_file_path(rstream->path_name, | |
28ab034a JG |
2225 | rstream->channel_name, |
2226 | rstream->tracefile_size, | |
2227 | vstream->current_tracefile_id, | |
cd9adb8b | 2228 | nullptr, |
28ab034a JG |
2229 | file_path, |
2230 | sizeof(file_path)); | |
d3e2ba59 JD |
2231 | if (ret < 0) { |
2232 | goto error; | |
2233 | } | |
ebb29c10 | 2234 | |
3ff5c5db MD |
2235 | /* |
2236 | * It is possible the the metadata file we are trying to open is | |
2237 | * missing if the stream has been closed (application exits with | |
2238 | * per-pid buffers) and a clear command has been performed. | |
2239 | */ | |
8bb66c3c | 2240 | status = lttng_trace_chunk_open_fs_handle( |
28ab034a | 2241 | vstream->stream_file.trace_chunk, file_path, O_RDONLY, 0, &fs_handle, true); |
ebb29c10 | 2242 | if (status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
b0d240a2 MD |
2243 | if (status == LTTNG_TRACE_CHUNK_STATUS_NO_FILE) { |
2244 | reply.status = htobe32(LTTNG_VIEWER_NO_NEW_METADATA); | |
2245 | len = 0; | |
2246 | if (vstream->stream->closed) { | |
2247 | viewer_stream_put(vstream); | |
2248 | } | |
2249 | goto send_reply; | |
2250 | } | |
ebb29c10 | 2251 | PERROR("Failed to open metadata file for viewer stream"); |
d3e2ba59 JD |
2252 | goto error; |
2253 | } | |
8bb66c3c | 2254 | vstream->stream_file.handle = fs_handle; |
ad8bec24 JG |
2255 | |
2256 | if (vstream->metadata_sent != 0) { | |
2257 | /* | |
2258 | * The client does not expect to receive any metadata | |
2259 | * it has received and metadata files in successive | |
2260 | * chunks must be a strict superset of one another. | |
2261 | * | |
2262 | * Skip the first `metadata_sent` bytes to ensure | |
2263 | * they are not sent a second time to the client. | |
2264 | * | |
2265 | * Baring a block layer error or an internal error, | |
2266 | * this seek should not fail as | |
2267 | * `vstream->stream->metadata_received` is reset when | |
2268 | * a relay stream is rotated. If this is reached, it is | |
2269 | * safe to assume that | |
2270 | * `metadata_received` > `metadata_sent`. | |
2271 | */ | |
28ab034a JG |
2272 | const off_t seek_ret = |
2273 | fs_handle_seek(fs_handle, vstream->metadata_sent, SEEK_SET); | |
ad8bec24 JG |
2274 | |
2275 | if (seek_ret < 0) { | |
2276 | PERROR("Failed to seek metadata viewer stream file to `sent` position: pos = %" PRId64, | |
28ab034a | 2277 | vstream->metadata_sent); |
ad8bec24 JG |
2278 | reply.status = htobe32(LTTNG_VIEWER_METADATA_ERR); |
2279 | goto send_reply; | |
2280 | } | |
2281 | } | |
d3e2ba59 JD |
2282 | } |
2283 | ||
2284 | reply.len = htobe64(len); | |
64803277 | 2285 | data = zmalloc<char>(len); |
d3e2ba59 JD |
2286 | if (!data) { |
2287 | PERROR("viewer metadata zmalloc"); | |
2288 | goto error; | |
2289 | } | |
2290 | ||
8bb66c3c JG |
2291 | fd = fs_handle_get_fd(vstream->stream_file.handle); |
2292 | if (fd < 0) { | |
2293 | ERR("Failed to restore viewer stream file system handle"); | |
2294 | goto error; | |
2295 | } | |
2296 | read_len = lttng_read(fd, data, len); | |
2297 | fs_handle_put_fd(vstream->stream_file.handle); | |
2298 | fd = -1; | |
6cd525e8 | 2299 | if (read_len < len) { |
ad8bec24 JG |
2300 | if (read_len < 0) { |
2301 | PERROR("Failed to read metadata file"); | |
2302 | goto error; | |
2303 | } else { | |
2304 | /* | |
2305 | * A clear has been performed which prevents the relay | |
2306 | * from sending `len` bytes of metadata. | |
2307 | * | |
2308 | * It is important not to send any metadata if we | |
2309 | * couldn't read all the available metadata in one shot: | |
2310 | * sending partial metadata can cause the client to | |
2311 | * attempt to parse an incomplete (incoherent) metadata | |
2312 | * stream, which would result in an error. | |
2313 | */ | |
28ab034a JG |
2314 | const off_t seek_ret = |
2315 | fs_handle_seek(vstream->stream_file.handle, -read_len, SEEK_CUR); | |
ad8bec24 | 2316 | |
cfa1e2c2 | 2317 | DBG("Failed to read metadata: requested = %" PRIu64 ", got = %zd", |
28ab034a JG |
2318 | len, |
2319 | read_len); | |
ad8bec24 JG |
2320 | read_len = 0; |
2321 | len = 0; | |
2322 | if (seek_ret < 0) { | |
2323 | PERROR("Failed to restore metadata file position after partial read"); | |
2324 | ret = -1; | |
2325 | goto error; | |
2326 | } | |
2327 | } | |
d3e2ba59 | 2328 | } |
7591bab1 | 2329 | vstream->metadata_sent += read_len; |
c4e361a4 | 2330 | reply.status = htobe32(LTTNG_VIEWER_METADATA_OK); |
7591bab1 | 2331 | |
d3e2ba59 JD |
2332 | goto send_reply; |
2333 | ||
2334 | error: | |
c4e361a4 | 2335 | reply.status = htobe32(LTTNG_VIEWER_METADATA_ERR); |
d3e2ba59 JD |
2336 | |
2337 | send_reply: | |
eea7556c | 2338 | health_code_update(); |
7591bab1 MD |
2339 | if (vstream) { |
2340 | pthread_mutex_unlock(&vstream->stream->lock); | |
2341 | } | |
58eb9381 | 2342 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 2343 | if (ret < 0) { |
7591bab1 | 2344 | goto end_free; |
d3e2ba59 | 2345 | } |
eea7556c | 2346 | health_code_update(); |
d3e2ba59 JD |
2347 | |
2348 | if (len > 0) { | |
58eb9381 | 2349 | ret = send_response(conn->sock, data, len); |
d3e2ba59 | 2350 | if (ret < 0) { |
7591bab1 | 2351 | goto end_free; |
d3e2ba59 JD |
2352 | } |
2353 | } | |
2354 | ||
28ab034a JG |
2355 | DBG("Sent %" PRIu64 " bytes of metadata for stream %" PRIu64, |
2356 | len, | |
2357 | (uint64_t) be64toh(request.stream_id)); | |
d3e2ba59 JD |
2358 | |
2359 | DBG("Metadata sent"); | |
2360 | ||
7591bab1 | 2361 | end_free: |
d3e2ba59 | 2362 | free(data); |
d3e2ba59 | 2363 | end: |
7591bab1 MD |
2364 | if (vstream) { |
2365 | viewer_stream_put(vstream); | |
2366 | } | |
d3e2ba59 JD |
2367 | return ret; |
2368 | } | |
2369 | ||
c3b7390b JD |
2370 | /* |
2371 | * Create a viewer session. | |
2372 | * | |
2373 | * Return 0 on success or else a negative value. | |
2374 | */ | |
28ab034a | 2375 | static int viewer_create_session(struct relay_connection *conn) |
c3b7390b JD |
2376 | { |
2377 | int ret; | |
2378 | struct lttng_viewer_create_session_response resp; | |
2379 | ||
53efb85a | 2380 | memset(&resp, 0, sizeof(resp)); |
c3b7390b | 2381 | resp.status = htobe32(LTTNG_VIEWER_CREATE_SESSION_OK); |
7591bab1 | 2382 | conn->viewer_session = viewer_session_create(); |
c3b7390b JD |
2383 | if (!conn->viewer_session) { |
2384 | ERR("Allocation viewer session"); | |
2385 | resp.status = htobe32(LTTNG_VIEWER_CREATE_SESSION_ERR); | |
2386 | goto send_reply; | |
2387 | } | |
c3b7390b JD |
2388 | |
2389 | send_reply: | |
2390 | health_code_update(); | |
2391 | ret = send_response(conn->sock, &resp, sizeof(resp)); | |
2392 | if (ret < 0) { | |
2393 | goto end; | |
2394 | } | |
2395 | health_code_update(); | |
2396 | ret = 0; | |
2397 | ||
2398 | end: | |
2399 | return ret; | |
2400 | } | |
2401 | ||
d62023be JD |
2402 | /* |
2403 | * Detach a viewer session. | |
2404 | * | |
2405 | * Return 0 on success or else a negative value. | |
2406 | */ | |
28ab034a | 2407 | static int viewer_detach_session(struct relay_connection *conn) |
d62023be JD |
2408 | { |
2409 | int ret; | |
2410 | struct lttng_viewer_detach_session_response response; | |
2411 | struct lttng_viewer_detach_session_request request; | |
cd9adb8b | 2412 | struct relay_session *session = nullptr; |
d62023be JD |
2413 | uint64_t viewer_session_to_close; |
2414 | ||
a0377dfe | 2415 | LTTNG_ASSERT(conn); |
d62023be JD |
2416 | |
2417 | health_code_update(); | |
2418 | ||
2419 | /* Receive the request from the connected client. */ | |
2420 | ret = recv_request(conn->sock, &request, sizeof(request)); | |
2421 | if (ret < 0) { | |
2422 | goto end; | |
2423 | } | |
2424 | viewer_session_to_close = be64toh(request.session_id); | |
2425 | ||
2426 | if (!conn->viewer_session) { | |
2427 | DBG("Client trying to detach before creating a live viewer session"); | |
2428 | response.status = htobe32(LTTNG_VIEWER_DETACH_SESSION_ERR); | |
2429 | goto send_reply; | |
2430 | } | |
2431 | ||
2432 | health_code_update(); | |
2433 | ||
2434 | memset(&response, 0, sizeof(response)); | |
2435 | DBG("Detaching from session ID %" PRIu64, viewer_session_to_close); | |
2436 | ||
2437 | session = session_get_by_id(be64toh(request.session_id)); | |
2438 | if (!session) { | |
28ab034a | 2439 | DBG("Relay session %" PRIu64 " not found", (uint64_t) be64toh(request.session_id)); |
d62023be JD |
2440 | response.status = htobe32(LTTNG_VIEWER_DETACH_SESSION_UNK); |
2441 | goto send_reply; | |
2442 | } | |
2443 | ||
2444 | ret = viewer_session_is_attached(conn->viewer_session, session); | |
2445 | if (ret != 1) { | |
2446 | DBG("Not attached to this session"); | |
2447 | response.status = htobe32(LTTNG_VIEWER_DETACH_SESSION_ERR); | |
2448 | goto send_reply_put; | |
2449 | } | |
2450 | ||
2451 | viewer_session_close_one_session(conn->viewer_session, session); | |
2452 | response.status = htobe32(LTTNG_VIEWER_DETACH_SESSION_OK); | |
2453 | DBG("Session %" PRIu64 " detached.", viewer_session_to_close); | |
2454 | ||
2455 | send_reply_put: | |
2456 | session_put(session); | |
2457 | ||
2458 | send_reply: | |
2459 | health_code_update(); | |
2460 | ret = send_response(conn->sock, &response, sizeof(response)); | |
2461 | if (ret < 0) { | |
2462 | goto end; | |
2463 | } | |
2464 | health_code_update(); | |
2465 | ret = 0; | |
2466 | ||
2467 | end: | |
2468 | return ret; | |
2469 | } | |
c3b7390b | 2470 | |
d3e2ba59 JD |
2471 | /* |
2472 | * live_relay_unknown_command: send -1 if received unknown command | |
2473 | */ | |
28ab034a | 2474 | static void live_relay_unknown_command(struct relay_connection *conn) |
d3e2ba59 JD |
2475 | { |
2476 | struct lttcomm_relayd_generic_reply reply; | |
d3e2ba59 | 2477 | |
53efb85a | 2478 | memset(&reply, 0, sizeof(reply)); |
d3e2ba59 | 2479 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
58eb9381 | 2480 | (void) send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 JD |
2481 | } |
2482 | ||
2483 | /* | |
2484 | * Process the commands received on the control socket | |
2485 | */ | |
28ab034a | 2486 | static int process_control(struct lttng_viewer_cmd *recv_hdr, struct relay_connection *conn) |
d3e2ba59 JD |
2487 | { |
2488 | int ret = 0; | |
28ab034a | 2489 | lttng_viewer_command cmd = (lttng_viewer_command) be32toh(recv_hdr->cmd); |
2f8f53af DG |
2490 | |
2491 | /* | |
7201079f FD |
2492 | * Make sure we've done the version check before any command other then |
2493 | * a new client connection. | |
2f8f53af | 2494 | */ |
7201079f FD |
2495 | if (cmd != LTTNG_VIEWER_CONNECT && !conn->version_check_done) { |
2496 | ERR("Viewer on connection %d requested %s command before version check", | |
28ab034a JG |
2497 | conn->sock->fd, |
2498 | lttng_viewer_command_str(cmd)); | |
2f8f53af DG |
2499 | ret = -1; |
2500 | goto end; | |
2501 | } | |
d3e2ba59 | 2502 | |
7201079f | 2503 | DBG("Processing %s viewer command from connection %d", |
28ab034a JG |
2504 | lttng_viewer_command_str(cmd), |
2505 | conn->sock->fd); | |
7201079f FD |
2506 | |
2507 | switch (cmd) { | |
c4e361a4 | 2508 | case LTTNG_VIEWER_CONNECT: |
58eb9381 | 2509 | ret = viewer_connect(conn); |
d3e2ba59 | 2510 | break; |
c4e361a4 | 2511 | case LTTNG_VIEWER_LIST_SESSIONS: |
58eb9381 | 2512 | ret = viewer_list_sessions(conn); |
d3e2ba59 | 2513 | break; |
c4e361a4 | 2514 | case LTTNG_VIEWER_ATTACH_SESSION: |
58eb9381 | 2515 | ret = viewer_attach_session(conn); |
d3e2ba59 | 2516 | break; |
c4e361a4 | 2517 | case LTTNG_VIEWER_GET_NEXT_INDEX: |
58eb9381 | 2518 | ret = viewer_get_next_index(conn); |
d3e2ba59 | 2519 | break; |
c4e361a4 | 2520 | case LTTNG_VIEWER_GET_PACKET: |
58eb9381 | 2521 | ret = viewer_get_packet(conn); |
d3e2ba59 | 2522 | break; |
c4e361a4 | 2523 | case LTTNG_VIEWER_GET_METADATA: |
58eb9381 | 2524 | ret = viewer_get_metadata(conn); |
d3e2ba59 | 2525 | break; |
c4e361a4 | 2526 | case LTTNG_VIEWER_GET_NEW_STREAMS: |
58eb9381 | 2527 | ret = viewer_get_new_streams(conn); |
80e8027a | 2528 | break; |
c3b7390b JD |
2529 | case LTTNG_VIEWER_CREATE_SESSION: |
2530 | ret = viewer_create_session(conn); | |
2531 | break; | |
d62023be JD |
2532 | case LTTNG_VIEWER_DETACH_SESSION: |
2533 | ret = viewer_detach_session(conn); | |
2534 | break; | |
d3e2ba59 | 2535 | default: |
28ab034a | 2536 | ERR("Received unknown viewer command (%u)", be32toh(recv_hdr->cmd)); |
58eb9381 | 2537 | live_relay_unknown_command(conn); |
d3e2ba59 JD |
2538 | ret = -1; |
2539 | goto end; | |
2540 | } | |
2541 | ||
2542 | end: | |
2543 | return ret; | |
2544 | } | |
2545 | ||
28ab034a | 2546 | static void cleanup_connection_pollfd(struct lttng_poll_event *events, int pollfd) |
d3e2ba59 JD |
2547 | { |
2548 | int ret; | |
2549 | ||
58eb9381 | 2550 | (void) lttng_poll_del(events, pollfd); |
d3e2ba59 | 2551 | |
28ab034a | 2552 | ret = fd_tracker_close_unsuspendable_fd( |
cd9adb8b | 2553 | the_fd_tracker, &pollfd, 1, fd_tracker_util_close_fd, nullptr); |
d3e2ba59 JD |
2554 | if (ret < 0) { |
2555 | ERR("Closing pollfd %d", pollfd); | |
2556 | } | |
2557 | } | |
2558 | ||
d3e2ba59 JD |
2559 | /* |
2560 | * This thread does the actual work | |
2561 | */ | |
28ab034a | 2562 | static void *thread_worker(void *data __attribute__((unused))) |
d3e2ba59 JD |
2563 | { |
2564 | int ret, err = -1; | |
2565 | uint32_t nb_fd; | |
d3e2ba59 | 2566 | struct lttng_poll_event events; |
7591bab1 | 2567 | struct lttng_ht *viewer_connections_ht; |
d3e2ba59 JD |
2568 | struct lttng_ht_iter iter; |
2569 | struct lttng_viewer_cmd recv_hdr; | |
302d8906 | 2570 | struct relay_connection *destroy_conn; |
d3e2ba59 JD |
2571 | |
2572 | DBG("[thread] Live viewer relay worker started"); | |
2573 | ||
2574 | rcu_register_thread(); | |
2575 | ||
eea7556c MD |
2576 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_WORKER); |
2577 | ||
9b5e0863 MD |
2578 | if (testpoint(relayd_thread_live_worker)) { |
2579 | goto error_testpoint; | |
2580 | } | |
2581 | ||
d3e2ba59 | 2582 | /* table of connections indexed on socket */ |
7591bab1 MD |
2583 | viewer_connections_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
2584 | if (!viewer_connections_ht) { | |
2585 | goto viewer_connections_ht_error; | |
d3e2ba59 JD |
2586 | } |
2587 | ||
28ab034a | 2588 | ret = create_named_thread_poll_set(&events, 2, "Live viewer worker thread epoll"); |
d3e2ba59 JD |
2589 | if (ret < 0) { |
2590 | goto error_poll_create; | |
2591 | } | |
2592 | ||
58eb9381 | 2593 | ret = lttng_poll_add(&events, live_conn_pipe[0], LPOLLIN | LPOLLRDHUP); |
d3e2ba59 JD |
2594 | if (ret < 0) { |
2595 | goto error; | |
2596 | } | |
2597 | ||
2598 | restart: | |
cd9adb8b | 2599 | while (true) { |
d3e2ba59 JD |
2600 | int i; |
2601 | ||
eea7556c MD |
2602 | health_code_update(); |
2603 | ||
d3e2ba59 JD |
2604 | /* Infinite blocking call, waiting for transmission */ |
2605 | DBG3("Relayd live viewer worker thread polling..."); | |
eea7556c | 2606 | health_poll_entry(); |
d3e2ba59 | 2607 | ret = lttng_poll_wait(&events, -1); |
eea7556c | 2608 | health_poll_exit(); |
d3e2ba59 JD |
2609 | if (ret < 0) { |
2610 | /* | |
2611 | * Restart interrupted system call. | |
2612 | */ | |
2613 | if (errno == EINTR) { | |
2614 | goto restart; | |
2615 | } | |
2616 | goto error; | |
2617 | } | |
2618 | ||
2619 | nb_fd = ret; | |
2620 | ||
2621 | /* | |
2622 | * Process control. The control connection is prioritised so we don't | |
2623 | * starve it with high throughput tracing data on the data | |
2624 | * connection. | |
2625 | */ | |
2626 | for (i = 0; i < nb_fd; i++) { | |
2627 | /* Fetch once the poll data */ | |
8a00688e MJ |
2628 | const auto revents = LTTNG_POLL_GETEV(&events, i); |
2629 | const auto pollfd = LTTNG_POLL_GETFD(&events, i); | |
d3e2ba59 | 2630 | |
eea7556c MD |
2631 | health_code_update(); |
2632 | ||
8a00688e MJ |
2633 | /* Activity on thread quit pipe, exiting. */ |
2634 | if (relayd_is_thread_quit_pipe(pollfd)) { | |
2635 | DBG("Activity on thread quit pipe"); | |
d3e2ba59 JD |
2636 | err = 0; |
2637 | goto exit; | |
2638 | } | |
2639 | ||
7591bab1 | 2640 | /* Inspect the relay conn pipe for new connection. */ |
58eb9381 | 2641 | if (pollfd == live_conn_pipe[0]) { |
03e43155 | 2642 | if (revents & LPOLLIN) { |
302d8906 JG |
2643 | struct relay_connection *conn; |
2644 | ||
5c7248cd JG |
2645 | ret = lttng_read(live_conn_pipe[0], |
2646 | &conn, | |
2647 | sizeof(conn)); /* NOLINT sizeof used on a | |
2648 | pointer. */ | |
d3e2ba59 JD |
2649 | if (ret < 0) { |
2650 | goto error; | |
2651 | } | |
28ab034a JG |
2652 | ret = lttng_poll_add( |
2653 | &events, conn->sock->fd, LPOLLIN | LPOLLRDHUP); | |
73039936 FD |
2654 | if (ret) { |
2655 | ERR("Failed to add new live connection file descriptor to poll set"); | |
2656 | goto error; | |
2657 | } | |
7591bab1 MD |
2658 | connection_ht_add(viewer_connections_ht, conn); |
2659 | DBG("Connection socket %d added to poll", conn->sock->fd); | |
03e43155 MD |
2660 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
2661 | ERR("Relay live pipe error"); | |
2662 | goto error; | |
2663 | } else { | |
28ab034a JG |
2664 | ERR("Unexpected poll events %u for sock %d", |
2665 | revents, | |
2666 | pollfd); | |
03e43155 | 2667 | goto error; |
d3e2ba59 | 2668 | } |
58eb9381 | 2669 | } else { |
7591bab1 | 2670 | /* Connection activity. */ |
302d8906 JG |
2671 | struct relay_connection *conn; |
2672 | ||
7591bab1 MD |
2673 | conn = connection_get_by_sock(viewer_connections_ht, pollfd); |
2674 | if (!conn) { | |
2675 | continue; | |
2676 | } | |
58eb9381 | 2677 | |
03e43155 | 2678 | if (revents & LPOLLIN) { |
28ab034a JG |
2679 | ret = conn->sock->ops->recvmsg( |
2680 | conn->sock, &recv_hdr, sizeof(recv_hdr), 0); | |
d3e2ba59 | 2681 | if (ret <= 0) { |
7591bab1 | 2682 | /* Connection closed. */ |
58eb9381 | 2683 | cleanup_connection_pollfd(&events, pollfd); |
7591bab1 MD |
2684 | /* Put "create" ownership reference. */ |
2685 | connection_put(conn); | |
58eb9381 | 2686 | DBG("Viewer control conn closed with %d", pollfd); |
d3e2ba59 | 2687 | } else { |
58eb9381 | 2688 | ret = process_control(&recv_hdr, conn); |
d3e2ba59 JD |
2689 | if (ret < 0) { |
2690 | /* Clear the session on error. */ | |
58eb9381 | 2691 | cleanup_connection_pollfd(&events, pollfd); |
7591bab1 MD |
2692 | /* Put "create" ownership reference. */ |
2693 | connection_put(conn); | |
28ab034a JG |
2694 | DBG("Viewer connection closed with %d", |
2695 | pollfd); | |
d3e2ba59 JD |
2696 | } |
2697 | } | |
03e43155 MD |
2698 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
2699 | cleanup_connection_pollfd(&events, pollfd); | |
2700 | /* Put "create" ownership reference. */ | |
2701 | connection_put(conn); | |
2702 | } else { | |
28ab034a JG |
2703 | ERR("Unexpected poll events %u for sock %d", |
2704 | revents, | |
2705 | pollfd); | |
03e43155 MD |
2706 | connection_put(conn); |
2707 | goto error; | |
d3e2ba59 | 2708 | } |
7591bab1 MD |
2709 | /* Put local "get_by_sock" reference. */ |
2710 | connection_put(conn); | |
d3e2ba59 JD |
2711 | } |
2712 | } | |
2713 | } | |
2714 | ||
2715 | exit: | |
2716 | error: | |
35bc1f58 | 2717 | (void) fd_tracker_util_poll_clean(the_fd_tracker, &events); |
d3e2ba59 | 2718 | |
71efa8ef | 2719 | /* Cleanup remaining connection object. */ |
d3e2ba59 | 2720 | rcu_read_lock(); |
28ab034a | 2721 | cds_lfht_for_each_entry (viewer_connections_ht->ht, &iter.iter, destroy_conn, sock_n.node) { |
eea7556c | 2722 | health_code_update(); |
7591bab1 | 2723 | connection_put(destroy_conn); |
d3e2ba59 JD |
2724 | } |
2725 | rcu_read_unlock(); | |
2726 | error_poll_create: | |
7591bab1 MD |
2727 | lttng_ht_destroy(viewer_connections_ht); |
2728 | viewer_connections_ht_error: | |
58eb9381 | 2729 | /* Close relay conn pipes */ |
87bcbe91 | 2730 | (void) fd_tracker_util_pipe_close(the_fd_tracker, live_conn_pipe); |
d3e2ba59 JD |
2731 | if (err) { |
2732 | DBG("Viewer worker thread exited with error"); | |
2733 | } | |
2734 | DBG("Viewer worker thread cleanup complete"); | |
9b5e0863 | 2735 | error_testpoint: |
eea7556c MD |
2736 | if (err) { |
2737 | health_error(); | |
2738 | ERR("Health error occurred in %s", __func__); | |
2739 | } | |
2740 | health_unregister(health_relayd); | |
b4aacfdc MD |
2741 | if (lttng_relay_stop_threads()) { |
2742 | ERR("Error stopping threads"); | |
178a0557 | 2743 | } |
d3e2ba59 | 2744 | rcu_unregister_thread(); |
cd9adb8b | 2745 | return nullptr; |
d3e2ba59 JD |
2746 | } |
2747 | ||
2748 | /* | |
2749 | * Create the relay command pipe to wake thread_manage_apps. | |
2750 | * Closed in cleanup(). | |
2751 | */ | |
cd9adb8b | 2752 | static int create_conn_pipe() |
d3e2ba59 | 2753 | { |
28ab034a JG |
2754 | return fd_tracker_util_pipe_open_cloexec( |
2755 | the_fd_tracker, "Live connection pipe", live_conn_pipe); | |
178a0557 | 2756 | } |
d3e2ba59 | 2757 | |
cd9adb8b | 2758 | int relayd_live_join() |
d3e2ba59 | 2759 | { |
178a0557 | 2760 | int ret, retval = 0; |
d3e2ba59 JD |
2761 | void *status; |
2762 | ||
d3e2ba59 | 2763 | ret = pthread_join(live_listener_thread, &status); |
178a0557 MD |
2764 | if (ret) { |
2765 | errno = ret; | |
d3e2ba59 | 2766 | PERROR("pthread_join live listener"); |
178a0557 | 2767 | retval = -1; |
d3e2ba59 JD |
2768 | } |
2769 | ||
2770 | ret = pthread_join(live_worker_thread, &status); | |
178a0557 MD |
2771 | if (ret) { |
2772 | errno = ret; | |
d3e2ba59 | 2773 | PERROR("pthread_join live worker"); |
178a0557 | 2774 | retval = -1; |
d3e2ba59 JD |
2775 | } |
2776 | ||
2777 | ret = pthread_join(live_dispatcher_thread, &status); | |
178a0557 MD |
2778 | if (ret) { |
2779 | errno = ret; | |
d3e2ba59 | 2780 | PERROR("pthread_join live dispatcher"); |
178a0557 | 2781 | retval = -1; |
d3e2ba59 JD |
2782 | } |
2783 | ||
178a0557 | 2784 | cleanup_relayd_live(); |
d3e2ba59 | 2785 | |
178a0557 | 2786 | return retval; |
d3e2ba59 JD |
2787 | } |
2788 | ||
2789 | /* | |
2790 | * main | |
2791 | */ | |
7591bab1 | 2792 | int relayd_live_create(struct lttng_uri *uri) |
d3e2ba59 | 2793 | { |
178a0557 | 2794 | int ret = 0, retval = 0; |
d3e2ba59 JD |
2795 | void *status; |
2796 | int is_root; | |
2797 | ||
178a0557 MD |
2798 | if (!uri) { |
2799 | retval = -1; | |
2800 | goto exit_init_data; | |
2801 | } | |
d3e2ba59 JD |
2802 | live_uri = uri; |
2803 | ||
d3e2ba59 JD |
2804 | /* Check if daemon is UID = 0 */ |
2805 | is_root = !getuid(); | |
2806 | ||
2807 | if (!is_root) { | |
2808 | if (live_uri->port < 1024) { | |
2809 | ERR("Need to be root to use ports < 1024"); | |
178a0557 MD |
2810 | retval = -1; |
2811 | goto exit_init_data; | |
d3e2ba59 JD |
2812 | } |
2813 | } | |
2814 | ||
2815 | /* Setup the thread apps communication pipe. */ | |
178a0557 MD |
2816 | if (create_conn_pipe()) { |
2817 | retval = -1; | |
2818 | goto exit_init_data; | |
d3e2ba59 JD |
2819 | } |
2820 | ||
2821 | /* Init relay command queue. */ | |
8bdee6e2 | 2822 | cds_wfcq_init(&viewer_conn_queue.head, &viewer_conn_queue.tail); |
d3e2ba59 JD |
2823 | |
2824 | /* Set up max poll set size */ | |
25b397f9 MD |
2825 | if (lttng_poll_set_max_size()) { |
2826 | retval = -1; | |
2827 | goto exit_init_data; | |
2828 | } | |
d3e2ba59 JD |
2829 | |
2830 | /* Setup the dispatcher thread */ | |
cd9adb8b JG |
2831 | ret = pthread_create(&live_dispatcher_thread, |
2832 | default_pthread_attr(), | |
2833 | thread_dispatcher, | |
2834 | (void *) nullptr); | |
178a0557 MD |
2835 | if (ret) { |
2836 | errno = ret; | |
d3e2ba59 | 2837 | PERROR("pthread_create viewer dispatcher"); |
178a0557 MD |
2838 | retval = -1; |
2839 | goto exit_dispatcher_thread; | |
d3e2ba59 JD |
2840 | } |
2841 | ||
2842 | /* Setup the worker thread */ | |
cd9adb8b | 2843 | ret = pthread_create(&live_worker_thread, default_pthread_attr(), thread_worker, nullptr); |
178a0557 MD |
2844 | if (ret) { |
2845 | errno = ret; | |
d3e2ba59 | 2846 | PERROR("pthread_create viewer worker"); |
178a0557 MD |
2847 | retval = -1; |
2848 | goto exit_worker_thread; | |
d3e2ba59 JD |
2849 | } |
2850 | ||
2851 | /* Setup the listener thread */ | |
28ab034a | 2852 | ret = pthread_create( |
cd9adb8b | 2853 | &live_listener_thread, default_pthread_attr(), thread_listener, (void *) nullptr); |
178a0557 MD |
2854 | if (ret) { |
2855 | errno = ret; | |
d3e2ba59 | 2856 | PERROR("pthread_create viewer listener"); |
178a0557 MD |
2857 | retval = -1; |
2858 | goto exit_listener_thread; | |
d3e2ba59 JD |
2859 | } |
2860 | ||
178a0557 MD |
2861 | /* |
2862 | * All OK, started all threads. | |
2863 | */ | |
2864 | return retval; | |
2865 | ||
9911d21b JG |
2866 | /* |
2867 | * Join on the live_listener_thread should anything be added after | |
2868 | * the live_listener thread's creation. | |
2869 | */ | |
d3e2ba59 | 2870 | |
178a0557 | 2871 | exit_listener_thread: |
d3e2ba59 | 2872 | |
d3e2ba59 | 2873 | ret = pthread_join(live_worker_thread, &status); |
178a0557 MD |
2874 | if (ret) { |
2875 | errno = ret; | |
d3e2ba59 | 2876 | PERROR("pthread_join live worker"); |
178a0557 | 2877 | retval = -1; |
d3e2ba59 | 2878 | } |
178a0557 | 2879 | exit_worker_thread: |
d3e2ba59 | 2880 | |
d3e2ba59 | 2881 | ret = pthread_join(live_dispatcher_thread, &status); |
178a0557 MD |
2882 | if (ret) { |
2883 | errno = ret; | |
d3e2ba59 | 2884 | PERROR("pthread_join live dispatcher"); |
178a0557 | 2885 | retval = -1; |
d3e2ba59 | 2886 | } |
178a0557 | 2887 | exit_dispatcher_thread: |
d3e2ba59 | 2888 | |
178a0557 MD |
2889 | exit_init_data: |
2890 | cleanup_relayd_live(); | |
d3e2ba59 | 2891 | |
178a0557 | 2892 | return retval; |
d3e2ba59 | 2893 | } |