SoW-2019-0002: Dynamic Snapshot
[lttng-tools.git] / src / common / relayd / relayd.c
1 /*
2 * Copyright (C) 2012 David Goulet <dgoulet@efficios.com>
3 *
4 * SPDX-License-Identifier: GPL-2.0-only
5 *
6 */
7
8 #define _LGPL_SOURCE
9 #include <assert.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <sys/stat.h>
14 #include <inttypes.h>
15
16 #include <common/common.h>
17 #include <common/defaults.h>
18 #include <common/compat/endian.h>
19 #include <common/compat/string.h>
20 #include <common/sessiond-comm/relayd.h>
21 #include <common/index/ctf-index.h>
22 #include <common/trace-chunk.h>
23 #include <common/string-utils/format.h>
24
25 #include "relayd.h"
26
27 static
28 bool relayd_supports_chunks(const struct lttcomm_relayd_sock *sock)
29 {
30 if (sock->major > 2) {
31 return true;
32 } else if (sock->major == 2 && sock->minor >= 11) {
33 return true;
34 }
35 return false;
36 }
37
38 static
39 bool relayd_supports_get_configuration(const struct lttcomm_relayd_sock *sock)
40 {
41 if (sock->major > 2) {
42 return true;
43 } else if (sock->major == 2 && sock->minor >= 12) {
44 return true;
45 }
46 return false;
47 }
48
49 /*
50 * Send command. Fill up the header and append the data.
51 */
52 static int send_command(struct lttcomm_relayd_sock *rsock,
53 enum lttcomm_relayd_command cmd, const void *data, size_t size,
54 int flags)
55 {
56 int ret;
57 struct lttcomm_relayd_hdr header;
58 char *buf;
59 uint64_t buf_size = sizeof(header);
60
61 if (rsock->sock.fd < 0) {
62 return -ECONNRESET;
63 }
64
65 if (data) {
66 buf_size += size;
67 }
68
69 buf = zmalloc(buf_size);
70 if (buf == NULL) {
71 PERROR("zmalloc relayd send command buf");
72 ret = -1;
73 goto alloc_error;
74 }
75
76 memset(&header, 0, sizeof(header));
77 header.cmd = htobe32(cmd);
78 header.data_size = htobe64(size);
79
80 /* Zeroed for now since not used. */
81 header.cmd_version = 0;
82 header.circuit_id = 0;
83
84 /* Prepare buffer to send. */
85 memcpy(buf, &header, sizeof(header));
86 if (data) {
87 memcpy(buf + sizeof(header), data, size);
88 }
89
90 DBG3("Relayd sending command %d of size %" PRIu64, (int) cmd, buf_size);
91 ret = rsock->sock.ops->sendmsg(&rsock->sock, buf, buf_size, flags);
92 if (ret < 0) {
93 PERROR("Failed to send command %d of size %" PRIu64,
94 (int) cmd, buf_size);
95 ret = -errno;
96 goto error;
97 }
98 error:
99 free(buf);
100 alloc_error:
101 return ret;
102 }
103
104 /*
105 * Receive reply data on socket. This MUST be call after send_command or else
106 * could result in unexpected behavior(s).
107 */
108 static int recv_reply(struct lttcomm_relayd_sock *rsock, void *data, size_t size)
109 {
110 int ret;
111
112 if (rsock->sock.fd < 0) {
113 return -ECONNRESET;
114 }
115
116 DBG3("Relayd waiting for reply of size %zu", size);
117
118 ret = rsock->sock.ops->recvmsg(&rsock->sock, data, size, 0);
119 if (ret <= 0 || ret != size) {
120 if (ret == 0) {
121 /* Orderly shutdown. */
122 DBG("Socket %d has performed an orderly shutdown", rsock->sock.fd);
123 } else {
124 DBG("Receiving reply failed on sock %d for size %zu with ret %d",
125 rsock->sock.fd, size, ret);
126 }
127 /* Always return -1 here and the caller can use errno. */
128 ret = -1;
129 goto error;
130 }
131
132 error:
133 return ret;
134 }
135
136 /*
137 * Starting from 2.11, RELAYD_CREATE_SESSION payload (session_name,
138 * hostname, and base_path) have no length restriction on the sender side.
139 * Length for both payloads is stored in the msg struct. A new dynamic size
140 * payload size is introduced.
141 */
142 static int relayd_create_session_2_11(struct lttcomm_relayd_sock *rsock,
143 const char *session_name, const char *hostname,
144 const char *base_path, int session_live_timer,
145 unsigned int snapshot, uint64_t sessiond_session_id,
146 const lttng_uuid sessiond_uuid, const uint64_t *current_chunk_id,
147 time_t creation_time, bool session_name_contains_creation_time,
148 struct lttcomm_relayd_create_session_reply_2_11 *reply,
149 char *output_path)
150 {
151 int ret;
152 struct lttcomm_relayd_create_session_2_11 *msg = NULL;
153 size_t session_name_len;
154 size_t hostname_len;
155 size_t base_path_len;
156 size_t msg_length;
157 char *dst;
158
159 if (!base_path) {
160 base_path = "";
161 }
162 /* The three names are sent with a '\0' delimiter between them. */
163 session_name_len = strlen(session_name) + 1;
164 hostname_len = strlen(hostname) + 1;
165 base_path_len = strlen(base_path) + 1;
166
167 msg_length = sizeof(*msg) + session_name_len + hostname_len + base_path_len;
168 msg = zmalloc(msg_length);
169 if (!msg) {
170 PERROR("zmalloc create_session_2_11 command message");
171 ret = -1;
172 goto error;
173 }
174
175 assert(session_name_len <= UINT32_MAX);
176 msg->session_name_len = htobe32(session_name_len);
177
178 assert(hostname_len <= UINT32_MAX);
179 msg->hostname_len = htobe32(hostname_len);
180
181 assert(base_path_len <= UINT32_MAX);
182 msg->base_path_len = htobe32(base_path_len);
183
184 dst = msg->names;
185 if (lttng_strncpy(dst, session_name, session_name_len)) {
186 ret = -1;
187 goto error;
188 }
189 dst += session_name_len;
190 if (lttng_strncpy(dst, hostname, hostname_len)) {
191 ret = -1;
192 goto error;
193 }
194 dst += hostname_len;
195 if (lttng_strncpy(dst, base_path, base_path_len)) {
196 ret = -1;
197 goto error;
198 }
199
200 msg->live_timer = htobe32(session_live_timer);
201 msg->snapshot = !!snapshot;
202
203 lttng_uuid_copy(msg->sessiond_uuid, sessiond_uuid);
204 msg->session_id = htobe64(sessiond_session_id);
205 msg->session_name_contains_creation_time = session_name_contains_creation_time;
206 if (current_chunk_id) {
207 LTTNG_OPTIONAL_SET(&msg->current_chunk_id,
208 htobe64(*current_chunk_id));
209 }
210
211 msg->creation_time = htobe64((uint64_t) creation_time);
212
213 /* Send command */
214 ret = send_command(rsock, RELAYD_CREATE_SESSION, msg, msg_length, 0);
215 if (ret < 0) {
216 goto error;
217 }
218 /* Receive response */
219 ret = recv_reply(rsock, reply, sizeof(*reply));
220 if (ret < 0) {
221 goto error;
222 }
223 reply->generic.session_id = be64toh(reply->generic.session_id);
224 reply->generic.ret_code = be32toh(reply->generic.ret_code);
225 reply->output_path_length = be32toh(reply->output_path_length);
226 if (reply->output_path_length >= LTTNG_PATH_MAX) {
227 ERR("Invalid session output path length in reply (%" PRIu32 " bytes) exceeds maximal allowed length (%d bytes)",
228 reply->output_path_length, LTTNG_PATH_MAX);
229 ret = -1;
230 goto error;
231 }
232 ret = recv_reply(rsock, output_path, reply->output_path_length);
233 if (ret < 0) {
234 goto error;
235 }
236 error:
237 free(msg);
238 return ret;
239 }
240 /*
241 * From 2.4 to 2.10, RELAYD_CREATE_SESSION takes additional parameters to
242 * support the live reading capability.
243 */
244 static int relayd_create_session_2_4(struct lttcomm_relayd_sock *rsock,
245 const char *session_name, const char *hostname,
246 int session_live_timer, unsigned int snapshot,
247 struct lttcomm_relayd_status_session *reply)
248 {
249 int ret;
250 struct lttcomm_relayd_create_session_2_4 msg;
251
252 if (lttng_strncpy(msg.session_name, session_name,
253 sizeof(msg.session_name))) {
254 ret = -1;
255 goto error;
256 }
257 if (lttng_strncpy(msg.hostname, hostname, sizeof(msg.hostname))) {
258 ret = -1;
259 goto error;
260 }
261 msg.live_timer = htobe32(session_live_timer);
262 msg.snapshot = htobe32(snapshot);
263
264 /* Send command */
265 ret = send_command(rsock, RELAYD_CREATE_SESSION, &msg, sizeof(msg), 0);
266 if (ret < 0) {
267 goto error;
268 }
269
270 /* Receive response */
271 ret = recv_reply(rsock, reply, sizeof(*reply));
272 if (ret < 0) {
273 goto error;
274 }
275 reply->session_id = be64toh(reply->session_id);
276 reply->ret_code = be32toh(reply->ret_code);
277 error:
278 return ret;
279 }
280
281 /*
282 * RELAYD_CREATE_SESSION from 2.1 to 2.3.
283 */
284 static int relayd_create_session_2_1(struct lttcomm_relayd_sock *rsock,
285 struct lttcomm_relayd_status_session *reply)
286 {
287 int ret;
288
289 /* Send command */
290 ret = send_command(rsock, RELAYD_CREATE_SESSION, NULL, 0, 0);
291 if (ret < 0) {
292 goto error;
293 }
294
295 /* Receive response */
296 ret = recv_reply(rsock, reply, sizeof(*reply));
297 if (ret < 0) {
298 goto error;
299 }
300 reply->session_id = be64toh(reply->session_id);
301 reply->ret_code = be32toh(reply->ret_code);
302 error:
303 return ret;
304 }
305
306 /*
307 * Send a RELAYD_CREATE_SESSION command to the relayd with the given socket and
308 * set session_id of the relayd if we have a successful reply from the relayd.
309 *
310 * On success, return 0 else a negative value which is either an errno error or
311 * a lttng error code from the relayd.
312 */
313 int relayd_create_session(struct lttcomm_relayd_sock *rsock,
314 uint64_t *relayd_session_id,
315 const char *session_name, const char *hostname,
316 const char *base_path, int session_live_timer,
317 unsigned int snapshot, uint64_t sessiond_session_id,
318 const lttng_uuid sessiond_uuid,
319 const uint64_t *current_chunk_id,
320 time_t creation_time, bool session_name_contains_creation_time,
321 char *output_path)
322 {
323 int ret;
324 struct lttcomm_relayd_create_session_reply_2_11 reply = {};
325
326 assert(rsock);
327 assert(relayd_session_id);
328
329 DBG("Relayd create session");
330
331 if (rsock->minor < 4) {
332 /* From 2.1 to 2.3 */
333 ret = relayd_create_session_2_1(rsock, &reply.generic);
334 } else if (rsock->minor >= 4 && rsock->minor < 11) {
335 /* From 2.4 to 2.10 */
336 ret = relayd_create_session_2_4(rsock, session_name,
337 hostname, session_live_timer, snapshot,
338 &reply.generic);
339 } else {
340 /* From 2.11 to ... */
341 ret = relayd_create_session_2_11(rsock, session_name,
342 hostname, base_path, session_live_timer, snapshot,
343 sessiond_session_id, sessiond_uuid,
344 current_chunk_id, creation_time,
345 session_name_contains_creation_time,
346 &reply, output_path);
347 }
348
349 if (ret < 0) {
350 goto error;
351 }
352
353 /* Return session id or negative ret code. */
354 if (reply.generic.ret_code != LTTNG_OK) {
355 ret = -1;
356 ERR("Relayd create session replied error %d",
357 reply.generic.ret_code);
358 goto error;
359 } else {
360 ret = 0;
361 *relayd_session_id = reply.generic.session_id;
362 }
363
364 DBG("Relayd session created with id %" PRIu64, reply.generic.session_id);
365
366 error:
367 return ret;
368 }
369
370 static int relayd_add_stream_2_1(struct lttcomm_relayd_sock *rsock,
371 const char *channel_name, const char *pathname)
372 {
373 int ret;
374 struct lttcomm_relayd_add_stream msg;
375
376 memset(&msg, 0, sizeof(msg));
377 if (lttng_strncpy(msg.channel_name, channel_name,
378 sizeof(msg.channel_name))) {
379 ret = -1;
380 goto error;
381 }
382
383 if (lttng_strncpy(msg.pathname, pathname,
384 sizeof(msg.pathname))) {
385 ret = -1;
386 goto error;
387 }
388
389 /* Send command */
390 ret = send_command(rsock, RELAYD_ADD_STREAM, (void *) &msg, sizeof(msg), 0);
391 if (ret < 0) {
392 ret = -1;
393 goto error;
394 }
395 ret = 0;
396 error:
397 return ret;
398 }
399
400 static int relayd_add_stream_2_2(struct lttcomm_relayd_sock *rsock,
401 const char *channel_name, const char *pathname,
402 uint64_t tracefile_size, uint64_t tracefile_count)
403 {
404 int ret;
405 struct lttcomm_relayd_add_stream_2_2 msg;
406
407 memset(&msg, 0, sizeof(msg));
408 /* Compat with relayd 2.2 to 2.10 */
409 if (lttng_strncpy(msg.channel_name, channel_name,
410 sizeof(msg.channel_name))) {
411 ret = -1;
412 goto error;
413 }
414 if (lttng_strncpy(msg.pathname, pathname,
415 sizeof(msg.pathname))) {
416 ret = -1;
417 goto error;
418 }
419 msg.tracefile_size = htobe64(tracefile_size);
420 msg.tracefile_count = htobe64(tracefile_count);
421
422 /* Send command */
423 ret = send_command(rsock, RELAYD_ADD_STREAM, (void *) &msg, sizeof(msg), 0);
424 if (ret < 0) {
425 goto error;
426 }
427 ret = 0;
428 error:
429 return ret;
430 }
431
432 static int relayd_add_stream_2_11(struct lttcomm_relayd_sock *rsock,
433 const char *channel_name, const char *pathname,
434 uint64_t tracefile_size, uint64_t tracefile_count,
435 uint64_t trace_archive_id)
436 {
437 int ret;
438 struct lttcomm_relayd_add_stream_2_11 *msg = NULL;
439 size_t channel_name_len;
440 size_t pathname_len;
441 size_t msg_length;
442
443 /* The two names are sent with a '\0' delimiter between them. */
444 channel_name_len = strlen(channel_name) + 1;
445 pathname_len = strlen(pathname) + 1;
446
447 msg_length = sizeof(*msg) + channel_name_len + pathname_len;
448 msg = zmalloc(msg_length);
449 if (!msg) {
450 PERROR("zmalloc add_stream_2_11 command message");
451 ret = -1;
452 goto error;
453 }
454
455 assert(channel_name_len <= UINT32_MAX);
456 msg->channel_name_len = htobe32(channel_name_len);
457
458 assert(pathname_len <= UINT32_MAX);
459 msg->pathname_len = htobe32(pathname_len);
460
461 if (lttng_strncpy(msg->names, channel_name, channel_name_len)) {
462 ret = -1;
463 goto error;
464 }
465 if (lttng_strncpy(msg->names + channel_name_len, pathname, pathname_len)) {
466 ret = -1;
467 goto error;
468 }
469
470 msg->tracefile_size = htobe64(tracefile_size);
471 msg->tracefile_count = htobe64(tracefile_count);
472 msg->trace_chunk_id = htobe64(trace_archive_id);
473
474 /* Send command */
475 ret = send_command(rsock, RELAYD_ADD_STREAM, (void *) msg, msg_length, 0);
476 if (ret < 0) {
477 goto error;
478 }
479 ret = 0;
480 error:
481 free(msg);
482 return ret;
483 }
484
485 /*
486 * Add stream on the relayd and assign stream handle to the stream_id argument.
487 *
488 * Chunks are not supported by relayd prior to 2.11, but are used to
489 * internally between session daemon and consumer daemon to keep track
490 * of the channel and stream output path.
491 *
492 * On success return 0 else return ret_code negative value.
493 */
494 int relayd_add_stream(struct lttcomm_relayd_sock *rsock, const char *channel_name,
495 const char *domain_name, const char *_pathname, uint64_t *stream_id,
496 uint64_t tracefile_size, uint64_t tracefile_count,
497 struct lttng_trace_chunk *trace_chunk)
498 {
499 int ret;
500 struct lttcomm_relayd_status_stream reply;
501 char pathname[RELAYD_COMM_LTTNG_PATH_MAX];
502 const char *separator;
503
504 /* Code flow error. Safety net. */
505 assert(rsock);
506 assert(channel_name);
507 assert(domain_name);
508 assert(_pathname);
509 assert(trace_chunk);
510
511 DBG("Relayd adding stream for channel name %s", channel_name);
512
513 if (_pathname[0] == '\0') {
514 separator = "";
515 } else {
516 separator = "/";
517 }
518 ret = snprintf(pathname, RELAYD_COMM_LTTNG_PATH_MAX, "%s%s%s",
519 domain_name, separator, _pathname);
520 if (ret <= 0 || ret >= RELAYD_COMM_LTTNG_PATH_MAX) {
521 ERR("stream path too long.");
522 ret = -1;
523 goto error;
524 }
525
526 /* Compat with relayd 2.1 */
527 if (rsock->minor == 1) {
528 /* For 2.1 */
529 ret = relayd_add_stream_2_1(rsock, channel_name, pathname);
530
531 } else if (rsock->minor > 1 && rsock->minor < 11) {
532 /* From 2.2 to 2.10 */
533 ret = relayd_add_stream_2_2(rsock, channel_name, pathname,
534 tracefile_size, tracefile_count);
535 } else {
536 enum lttng_trace_chunk_status chunk_status;
537 uint64_t chunk_id;
538
539 chunk_status = lttng_trace_chunk_get_id(trace_chunk,
540 &chunk_id);
541 assert(chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK);
542
543 /* From 2.11 to ...*/
544 ret = relayd_add_stream_2_11(rsock, channel_name, pathname,
545 tracefile_size, tracefile_count,
546 chunk_id);
547 }
548
549 if (ret) {
550 ret = -1;
551 goto error;
552 }
553
554 /* Waiting for reply */
555 ret = recv_reply(rsock, (void *) &reply, sizeof(reply));
556 if (ret < 0) {
557 goto error;
558 }
559
560 /* Back to host bytes order. */
561 reply.handle = be64toh(reply.handle);
562 reply.ret_code = be32toh(reply.ret_code);
563
564 /* Return session id or negative ret code. */
565 if (reply.ret_code != LTTNG_OK) {
566 ret = -1;
567 ERR("Relayd add stream replied error %d", reply.ret_code);
568 } else {
569 /* Success */
570 ret = 0;
571 *stream_id = reply.handle;
572 }
573
574 DBG("Relayd stream added successfully with handle %" PRIu64,
575 reply.handle);
576
577 error:
578 return ret;
579 }
580
581 /*
582 * Inform the relay that all the streams for the current channel has been sent.
583 *
584 * On success return 0 else return ret_code negative value.
585 */
586 int relayd_streams_sent(struct lttcomm_relayd_sock *rsock)
587 {
588 int ret;
589 struct lttcomm_relayd_generic_reply reply;
590
591 /* Code flow error. Safety net. */
592 assert(rsock);
593
594 DBG("Relayd sending streams sent.");
595
596 /* This feature was introduced in 2.4, ignore it for earlier versions. */
597 if (rsock->minor < 4) {
598 ret = 0;
599 goto end;
600 }
601
602 /* Send command */
603 ret = send_command(rsock, RELAYD_STREAMS_SENT, NULL, 0, 0);
604 if (ret < 0) {
605 goto error;
606 }
607
608 /* Waiting for reply */
609 ret = recv_reply(rsock, (void *) &reply, sizeof(reply));
610 if (ret < 0) {
611 goto error;
612 }
613
614 /* Back to host bytes order. */
615 reply.ret_code = be32toh(reply.ret_code);
616
617 /* Return session id or negative ret code. */
618 if (reply.ret_code != LTTNG_OK) {
619 ret = -1;
620 ERR("Relayd streams sent replied error %d", reply.ret_code);
621 goto error;
622 } else {
623 /* Success */
624 ret = 0;
625 }
626
627 DBG("Relayd streams sent success");
628
629 error:
630 end:
631 return ret;
632 }
633
634 /*
635 * Check version numbers on the relayd.
636 * If major versions are compatible, we assign minor_to_use to the
637 * minor version of the procotol we are going to use for this session.
638 *
639 * Return 0 if the two daemons are compatible, LTTNG_ERR_RELAYD_VERSION_FAIL
640 * otherwise, or a negative value on network errors.
641 */
642 int relayd_version_check(struct lttcomm_relayd_sock *rsock)
643 {
644 int ret;
645 struct lttcomm_relayd_version msg;
646
647 /* Code flow error. Safety net. */
648 assert(rsock);
649
650 DBG("Relayd version check for major.minor %u.%u", rsock->major,
651 rsock->minor);
652
653 memset(&msg, 0, sizeof(msg));
654 /* Prepare network byte order before transmission. */
655 msg.major = htobe32(rsock->major);
656 msg.minor = htobe32(rsock->minor);
657
658 /* Send command */
659 ret = send_command(rsock, RELAYD_VERSION, (void *) &msg, sizeof(msg), 0);
660 if (ret < 0) {
661 goto error;
662 }
663
664 /* Receive response */
665 ret = recv_reply(rsock, (void *) &msg, sizeof(msg));
666 if (ret < 0) {
667 goto error;
668 }
669
670 /* Set back to host bytes order */
671 msg.major = be32toh(msg.major);
672 msg.minor = be32toh(msg.minor);
673
674 /*
675 * Only validate the major version. If the other side is higher,
676 * communication is not possible. Only major version equal can talk to each
677 * other. If the minor version differs, the lowest version is used by both
678 * sides.
679 */
680 if (msg.major != rsock->major) {
681 /* Not compatible */
682 ret = LTTNG_ERR_RELAYD_VERSION_FAIL;
683 DBG2("Relayd version is NOT compatible. Relayd version %u != %u (us)",
684 msg.major, rsock->major);
685 goto error;
686 }
687
688 /*
689 * If the relayd's minor version is higher, it will adapt to our version so
690 * we can continue to use the latest relayd communication data structure.
691 * If the received minor version is higher, the relayd should adapt to us.
692 */
693 if (rsock->minor > msg.minor) {
694 rsock->minor = msg.minor;
695 }
696
697 /* Version number compatible */
698 DBG2("Relayd version is compatible, using protocol version %u.%u",
699 rsock->major, rsock->minor);
700 ret = 0;
701
702 error:
703 return ret;
704 }
705
706 /*
707 * Add stream on the relayd and assign stream handle to the stream_id argument.
708 *
709 * On success return 0 else return ret_code negative value.
710 */
711 int relayd_send_metadata(struct lttcomm_relayd_sock *rsock, size_t len)
712 {
713 int ret;
714
715 /* Code flow error. Safety net. */
716 assert(rsock);
717
718 DBG("Relayd sending metadata of size %zu", len);
719
720 /* Send command */
721 ret = send_command(rsock, RELAYD_SEND_METADATA, NULL, len, 0);
722 if (ret < 0) {
723 goto error;
724 }
725
726 DBG2("Relayd metadata added successfully");
727
728 /*
729 * After that call, the metadata data MUST be sent to the relayd so the
730 * receive size on the other end matches the len of the metadata packet
731 * header. This is why we don't wait for a reply here.
732 */
733
734 error:
735 return ret;
736 }
737
738 /*
739 * Connect to relay daemon with an allocated lttcomm_relayd_sock.
740 */
741 int relayd_connect(struct lttcomm_relayd_sock *rsock)
742 {
743 /* Code flow error. Safety net. */
744 assert(rsock);
745
746 if (!rsock->sock.ops) {
747 /*
748 * Attempting a connect on a non-initialized socket.
749 */
750 return -ECONNRESET;
751 }
752
753 DBG3("Relayd connect ...");
754
755 return rsock->sock.ops->connect(&rsock->sock);
756 }
757
758 /*
759 * Close relayd socket with an allocated lttcomm_relayd_sock.
760 *
761 * If no socket operations are found, simply return 0 meaning that everything
762 * is fine. Without operations, the socket can not possibly be opened or used.
763 * This is possible if the socket was allocated but not created. However, the
764 * caller could simply use it to store a valid file descriptor for instance
765 * passed over a Unix socket and call this to cleanup but still without a valid
766 * ops pointer.
767 *
768 * Return the close returned value. On error, a negative value is usually
769 * returned back from close(2).
770 */
771 int relayd_close(struct lttcomm_relayd_sock *rsock)
772 {
773 int ret;
774
775 /* Code flow error. Safety net. */
776 assert(rsock);
777
778 /* An invalid fd is fine, return success. */
779 if (rsock->sock.fd < 0) {
780 ret = 0;
781 goto end;
782 }
783
784 DBG3("Relayd closing socket %d", rsock->sock.fd);
785
786 if (rsock->sock.ops) {
787 ret = rsock->sock.ops->close(&rsock->sock);
788 } else {
789 /* Default call if no specific ops found. */
790 ret = close(rsock->sock.fd);
791 if (ret < 0) {
792 PERROR("relayd_close default close");
793 }
794 }
795 rsock->sock.fd = -1;
796
797 end:
798 return ret;
799 }
800
801 /*
802 * Send data header structure to the relayd.
803 */
804 int relayd_send_data_hdr(struct lttcomm_relayd_sock *rsock,
805 struct lttcomm_relayd_data_hdr *hdr, size_t size)
806 {
807 int ret;
808
809 /* Code flow error. Safety net. */
810 assert(rsock);
811 assert(hdr);
812
813 if (rsock->sock.fd < 0) {
814 return -ECONNRESET;
815 }
816
817 DBG3("Relayd sending data header of size %zu", size);
818
819 /* Again, safety net */
820 if (size == 0) {
821 size = sizeof(struct lttcomm_relayd_data_hdr);
822 }
823
824 /* Only send data header. */
825 ret = rsock->sock.ops->sendmsg(&rsock->sock, hdr, size, 0);
826 if (ret < 0) {
827 ret = -errno;
828 goto error;
829 }
830
831 /*
832 * The data MUST be sent right after that command for the receive on the
833 * other end to match the size in the header.
834 */
835
836 error:
837 return ret;
838 }
839
840 /*
841 * Send close stream command to the relayd.
842 */
843 int relayd_send_close_stream(struct lttcomm_relayd_sock *rsock, uint64_t stream_id,
844 uint64_t last_net_seq_num)
845 {
846 int ret;
847 struct lttcomm_relayd_close_stream msg;
848 struct lttcomm_relayd_generic_reply reply;
849
850 /* Code flow error. Safety net. */
851 assert(rsock);
852
853 DBG("Relayd closing stream id %" PRIu64, stream_id);
854
855 memset(&msg, 0, sizeof(msg));
856 msg.stream_id = htobe64(stream_id);
857 msg.last_net_seq_num = htobe64(last_net_seq_num);
858
859 /* Send command */
860 ret = send_command(rsock, RELAYD_CLOSE_STREAM, (void *) &msg, sizeof(msg), 0);
861 if (ret < 0) {
862 goto error;
863 }
864
865 /* Receive response */
866 ret = recv_reply(rsock, (void *) &reply, sizeof(reply));
867 if (ret < 0) {
868 goto error;
869 }
870
871 reply.ret_code = be32toh(reply.ret_code);
872
873 /* Return session id or negative ret code. */
874 if (reply.ret_code != LTTNG_OK) {
875 ret = -1;
876 ERR("Relayd close stream replied error %d", reply.ret_code);
877 } else {
878 /* Success */
879 ret = 0;
880 }
881
882 DBG("Relayd close stream id %" PRIu64 " successfully", stream_id);
883
884 error:
885 return ret;
886 }
887
888 /*
889 * Check for data availability for a given stream id.
890 *
891 * Return 0 if NOT pending, 1 if so and a negative value on error.
892 */
893 int relayd_data_pending(struct lttcomm_relayd_sock *rsock, uint64_t stream_id,
894 uint64_t last_net_seq_num)
895 {
896 int ret;
897 struct lttcomm_relayd_data_pending msg;
898 struct lttcomm_relayd_generic_reply reply;
899
900 /* Code flow error. Safety net. */
901 assert(rsock);
902
903 DBG("Relayd data pending for stream id %" PRIu64, stream_id);
904
905 memset(&msg, 0, sizeof(msg));
906 msg.stream_id = htobe64(stream_id);
907 msg.last_net_seq_num = htobe64(last_net_seq_num);
908
909 /* Send command */
910 ret = send_command(rsock, RELAYD_DATA_PENDING, (void *) &msg,
911 sizeof(msg), 0);
912 if (ret < 0) {
913 goto error;
914 }
915
916 /* Receive response */
917 ret = recv_reply(rsock, (void *) &reply, sizeof(reply));
918 if (ret < 0) {
919 goto error;
920 }
921
922 reply.ret_code = be32toh(reply.ret_code);
923
924 /* Return session id or negative ret code. */
925 if (reply.ret_code >= LTTNG_OK) {
926 ERR("Relayd data pending replied error %d", reply.ret_code);
927 }
928
929 /* At this point, the ret code is either 1 or 0 */
930 ret = reply.ret_code;
931
932 DBG("Relayd data is %s pending for stream id %" PRIu64,
933 ret == 1 ? "" : "NOT", stream_id);
934
935 error:
936 return ret;
937 }
938
939 /*
940 * Check on the relayd side for a quiescent state on the control socket.
941 */
942 int relayd_quiescent_control(struct lttcomm_relayd_sock *rsock,
943 uint64_t metadata_stream_id)
944 {
945 int ret;
946 struct lttcomm_relayd_quiescent_control msg;
947 struct lttcomm_relayd_generic_reply reply;
948
949 /* Code flow error. Safety net. */
950 assert(rsock);
951
952 DBG("Relayd checking quiescent control state");
953
954 memset(&msg, 0, sizeof(msg));
955 msg.stream_id = htobe64(metadata_stream_id);
956
957 /* Send command */
958 ret = send_command(rsock, RELAYD_QUIESCENT_CONTROL, &msg, sizeof(msg), 0);
959 if (ret < 0) {
960 goto error;
961 }
962
963 /* Receive response */
964 ret = recv_reply(rsock, (void *) &reply, sizeof(reply));
965 if (ret < 0) {
966 goto error;
967 }
968
969 reply.ret_code = be32toh(reply.ret_code);
970
971 /* Return session id or negative ret code. */
972 if (reply.ret_code != LTTNG_OK) {
973 ret = -1;
974 ERR("Relayd quiescent control replied error %d", reply.ret_code);
975 goto error;
976 }
977
978 /* Control socket is quiescent */
979 return 0;
980
981 error:
982 return ret;
983 }
984
985 /*
986 * Begin a data pending command for a specific session id.
987 */
988 int relayd_begin_data_pending(struct lttcomm_relayd_sock *rsock, uint64_t id)
989 {
990 int ret;
991 struct lttcomm_relayd_begin_data_pending msg;
992 struct lttcomm_relayd_generic_reply reply;
993
994 /* Code flow error. Safety net. */
995 assert(rsock);
996
997 DBG("Relayd begin data pending");
998
999 memset(&msg, 0, sizeof(msg));
1000 msg.session_id = htobe64(id);
1001
1002 /* Send command */
1003 ret = send_command(rsock, RELAYD_BEGIN_DATA_PENDING, &msg, sizeof(msg), 0);
1004 if (ret < 0) {
1005 goto error;
1006 }
1007
1008 /* Receive response */
1009 ret = recv_reply(rsock, (void *) &reply, sizeof(reply));
1010 if (ret < 0) {
1011 goto error;
1012 }
1013
1014 reply.ret_code = be32toh(reply.ret_code);
1015
1016 /* Return session id or negative ret code. */
1017 if (reply.ret_code != LTTNG_OK) {
1018 ret = -1;
1019 ERR("Relayd begin data pending replied error %d", reply.ret_code);
1020 goto error;
1021 }
1022
1023 return 0;
1024
1025 error:
1026 return ret;
1027 }
1028
1029 /*
1030 * End a data pending command for a specific session id.
1031 *
1032 * Return 0 on success and set is_data_inflight to 0 if no data is being
1033 * streamed or 1 if it is the case.
1034 */
1035 int relayd_end_data_pending(struct lttcomm_relayd_sock *rsock, uint64_t id,
1036 unsigned int *is_data_inflight)
1037 {
1038 int ret, recv_ret;
1039 struct lttcomm_relayd_end_data_pending msg;
1040 struct lttcomm_relayd_generic_reply reply;
1041
1042 /* Code flow error. Safety net. */
1043 assert(rsock);
1044
1045 DBG("Relayd end data pending");
1046
1047 memset(&msg, 0, sizeof(msg));
1048 msg.session_id = htobe64(id);
1049
1050 /* Send command */
1051 ret = send_command(rsock, RELAYD_END_DATA_PENDING, &msg, sizeof(msg), 0);
1052 if (ret < 0) {
1053 goto error;
1054 }
1055
1056 /* Receive response */
1057 ret = recv_reply(rsock, (void *) &reply, sizeof(reply));
1058 if (ret < 0) {
1059 goto error;
1060 }
1061
1062 recv_ret = be32toh(reply.ret_code);
1063 if (recv_ret < 0) {
1064 ret = recv_ret;
1065 goto error;
1066 }
1067
1068 *is_data_inflight = recv_ret;
1069
1070 DBG("Relayd end data pending is data inflight: %d", recv_ret);
1071
1072 return 0;
1073
1074 error:
1075 return ret;
1076 }
1077
1078 /*
1079 * Send index to the relayd.
1080 */
1081 int relayd_send_index(struct lttcomm_relayd_sock *rsock,
1082 struct ctf_packet_index *index, uint64_t relay_stream_id,
1083 uint64_t net_seq_num)
1084 {
1085 int ret;
1086 struct lttcomm_relayd_index msg;
1087 struct lttcomm_relayd_generic_reply reply;
1088
1089 /* Code flow error. Safety net. */
1090 assert(rsock);
1091
1092 if (rsock->minor < 4) {
1093 DBG("Not sending indexes before protocol 2.4");
1094 ret = 0;
1095 goto error;
1096 }
1097
1098 DBG("Relayd sending index for stream ID %" PRIu64, relay_stream_id);
1099
1100 memset(&msg, 0, sizeof(msg));
1101 msg.relay_stream_id = htobe64(relay_stream_id);
1102 msg.net_seq_num = htobe64(net_seq_num);
1103
1104 /* The index is already in big endian. */
1105 msg.packet_size = index->packet_size;
1106 msg.content_size = index->content_size;
1107 msg.timestamp_begin = index->timestamp_begin;
1108 msg.timestamp_end = index->timestamp_end;
1109 msg.events_discarded = index->events_discarded;
1110 msg.stream_id = index->stream_id;
1111
1112 if (rsock->minor >= 8) {
1113 msg.stream_instance_id = index->stream_instance_id;
1114 msg.packet_seq_num = index->packet_seq_num;
1115 }
1116
1117 /* Send command */
1118 ret = send_command(rsock, RELAYD_SEND_INDEX, &msg,
1119 lttcomm_relayd_index_len(lttng_to_index_major(rsock->major,
1120 rsock->minor),
1121 lttng_to_index_minor(rsock->major, rsock->minor)),
1122 0);
1123 if (ret < 0) {
1124 goto error;
1125 }
1126
1127 /* Receive response */
1128 ret = recv_reply(rsock, (void *) &reply, sizeof(reply));
1129 if (ret < 0) {
1130 goto error;
1131 }
1132
1133 reply.ret_code = be32toh(reply.ret_code);
1134
1135 /* Return session id or negative ret code. */
1136 if (reply.ret_code != LTTNG_OK) {
1137 ret = -1;
1138 ERR("Relayd send index replied error %d", reply.ret_code);
1139 } else {
1140 /* Success */
1141 ret = 0;
1142 }
1143
1144 error:
1145 return ret;
1146 }
1147
1148 /*
1149 * Ask the relay to reset the metadata trace file (regeneration).
1150 */
1151 int relayd_reset_metadata(struct lttcomm_relayd_sock *rsock,
1152 uint64_t stream_id, uint64_t version)
1153 {
1154 int ret;
1155 struct lttcomm_relayd_reset_metadata msg;
1156 struct lttcomm_relayd_generic_reply reply;
1157
1158 /* Code flow error. Safety net. */
1159 assert(rsock);
1160
1161 /* Should have been prevented by the sessiond. */
1162 if (rsock->minor < 8) {
1163 ERR("Metadata regeneration unsupported before 2.8");
1164 ret = -1;
1165 goto error;
1166 }
1167
1168 DBG("Relayd reset metadata stream id %" PRIu64, stream_id);
1169
1170 memset(&msg, 0, sizeof(msg));
1171 msg.stream_id = htobe64(stream_id);
1172 msg.version = htobe64(version);
1173
1174 /* Send command */
1175 ret = send_command(rsock, RELAYD_RESET_METADATA, (void *) &msg, sizeof(msg), 0);
1176 if (ret < 0) {
1177 goto error;
1178 }
1179
1180 /* Receive response */
1181 ret = recv_reply(rsock, (void *) &reply, sizeof(reply));
1182 if (ret < 0) {
1183 goto error;
1184 }
1185
1186 reply.ret_code = be32toh(reply.ret_code);
1187
1188 /* Return session id or negative ret code. */
1189 if (reply.ret_code != LTTNG_OK) {
1190 ret = -1;
1191 ERR("Relayd reset metadata replied error %d", reply.ret_code);
1192 } else {
1193 /* Success */
1194 ret = 0;
1195 }
1196
1197 DBG("Relayd reset metadata stream id %" PRIu64 " successfully", stream_id);
1198
1199 error:
1200 return ret;
1201 }
1202
1203 int relayd_rotate_streams(struct lttcomm_relayd_sock *sock,
1204 unsigned int stream_count, const uint64_t *new_chunk_id,
1205 const struct relayd_stream_rotation_position *positions)
1206 {
1207 int ret;
1208 unsigned int i;
1209 struct lttng_dynamic_buffer payload;
1210 struct lttcomm_relayd_generic_reply reply = {};
1211 const struct lttcomm_relayd_rotate_streams msg = {
1212 .stream_count = htobe32((uint32_t) stream_count),
1213 .new_chunk_id = (typeof(msg.new_chunk_id)) {
1214 .is_set = !!new_chunk_id,
1215 .value = htobe64(new_chunk_id ? *new_chunk_id : 0),
1216 },
1217 };
1218 char new_chunk_id_buf[MAX_INT_DEC_LEN(*new_chunk_id)] = {};
1219 const char *new_chunk_id_str;
1220
1221 if (!relayd_supports_chunks(sock)) {
1222 DBG("Refusing to rotate remote streams: relayd does not support chunks");
1223 return 0;
1224 }
1225
1226 lttng_dynamic_buffer_init(&payload);
1227
1228 /* Code flow error. Safety net. */
1229 assert(sock);
1230
1231 if (new_chunk_id) {
1232 ret = snprintf(new_chunk_id_buf, sizeof(new_chunk_id_buf),
1233 "%" PRIu64, *new_chunk_id);
1234 if (ret == -1 || ret >= sizeof(new_chunk_id_buf)) {
1235 new_chunk_id_str = "formatting error";
1236 } else {
1237 new_chunk_id_str = new_chunk_id_buf;
1238 }
1239 } else {
1240 new_chunk_id_str = "none";
1241 }
1242
1243 DBG("Preparing \"rotate streams\" command payload: new_chunk_id = %s, stream_count = %u",
1244 new_chunk_id_str, stream_count);
1245
1246 ret = lttng_dynamic_buffer_append(&payload, &msg, sizeof(msg));
1247 if (ret) {
1248 ERR("Failed to allocate \"rotate streams\" command payload");
1249 goto error;
1250 }
1251
1252 for (i = 0; i < stream_count; i++) {
1253 const struct relayd_stream_rotation_position *position =
1254 &positions[i];
1255 const struct lttcomm_relayd_stream_rotation_position comm_position = {
1256 .stream_id = htobe64(position->stream_id),
1257 .rotate_at_seq_num = htobe64(
1258 position->rotate_at_seq_num),
1259 };
1260
1261 DBG("Rotate stream %" PRIu64 "at sequence number %" PRIu64,
1262 position->stream_id,
1263 position->rotate_at_seq_num);
1264 ret = lttng_dynamic_buffer_append(&payload, &comm_position,
1265 sizeof(comm_position));
1266 if (ret) {
1267 ERR("Failed to allocate \"rotate streams\" command payload");
1268 goto error;
1269 }
1270 }
1271
1272 /* Send command. */
1273 ret = send_command(sock, RELAYD_ROTATE_STREAMS, payload.data,
1274 payload.size, 0);
1275 if (ret < 0) {
1276 ERR("Failed to send \"rotate stream\" command");
1277 goto error;
1278 }
1279
1280 /* Receive response. */
1281 ret = recv_reply(sock, &reply, sizeof(reply));
1282 if (ret < 0) {
1283 ERR("Failed to receive \"rotate streams\" command reply");
1284 goto error;
1285 }
1286
1287 reply.ret_code = be32toh(reply.ret_code);
1288 if (reply.ret_code != LTTNG_OK) {
1289 ret = -1;
1290 ERR("Relayd rotate streams replied error %d", reply.ret_code);
1291 } else {
1292 /* Success. */
1293 ret = 0;
1294 DBG("Relayd rotated streams successfully");
1295 }
1296
1297 error:
1298 lttng_dynamic_buffer_reset(&payload);
1299 return ret;
1300 }
1301
1302 int relayd_create_trace_chunk(struct lttcomm_relayd_sock *sock,
1303 struct lttng_trace_chunk *chunk)
1304 {
1305 int ret = 0;
1306 enum lttng_trace_chunk_status status;
1307 struct lttcomm_relayd_create_trace_chunk msg = {};
1308 struct lttcomm_relayd_generic_reply reply = {};
1309 struct lttng_dynamic_buffer payload;
1310 uint64_t chunk_id;
1311 time_t creation_timestamp;
1312 const char *chunk_name;
1313 size_t chunk_name_length;
1314 bool overridden_name;
1315
1316 lttng_dynamic_buffer_init(&payload);
1317
1318 if (!relayd_supports_chunks(sock)) {
1319 DBG("Refusing to create remote trace chunk: relayd does not support chunks");
1320 goto end;
1321 }
1322
1323 status = lttng_trace_chunk_get_id(chunk, &chunk_id);
1324 if (status != LTTNG_TRACE_CHUNK_STATUS_OK) {
1325 ret = -1;
1326 goto end;
1327 }
1328
1329 status = lttng_trace_chunk_get_creation_timestamp(
1330 chunk, &creation_timestamp);
1331 if (status != LTTNG_TRACE_CHUNK_STATUS_OK) {
1332 ret = -1;
1333 goto end;
1334 }
1335
1336 status = lttng_trace_chunk_get_name(
1337 chunk, &chunk_name, &overridden_name);
1338 if (status != LTTNG_TRACE_CHUNK_STATUS_OK &&
1339 status != LTTNG_TRACE_CHUNK_STATUS_NONE) {
1340 ret = -1;
1341 goto end;
1342 }
1343
1344 chunk_name_length = overridden_name ? (strlen(chunk_name) + 1) : 0;
1345 msg = (typeof(msg)){
1346 .chunk_id = htobe64(chunk_id),
1347 .creation_timestamp = htobe64((uint64_t) creation_timestamp),
1348 .override_name_length = htobe32((uint32_t) chunk_name_length),
1349 };
1350
1351 ret = lttng_dynamic_buffer_append(&payload, &msg, sizeof(msg));
1352 if (ret) {
1353 goto end;
1354 }
1355 if (chunk_name_length) {
1356 ret = lttng_dynamic_buffer_append(
1357 &payload, chunk_name, chunk_name_length);
1358 if (ret) {
1359 goto end;
1360 }
1361 }
1362
1363 ret = send_command(sock, RELAYD_CREATE_TRACE_CHUNK, payload.data,
1364 payload.size, 0);
1365 if (ret < 0) {
1366 ERR("Failed to send trace chunk creation command to relay daemon");
1367 goto end;
1368 }
1369
1370 ret = recv_reply(sock, &reply, sizeof(reply));
1371 if (ret < 0) {
1372 ERR("Failed to receive relay daemon trace chunk creation command reply");
1373 goto end;
1374 }
1375
1376 reply.ret_code = be32toh(reply.ret_code);
1377 if (reply.ret_code != LTTNG_OK) {
1378 ret = -1;
1379 ERR("Relayd trace chunk create replied error %d",
1380 reply.ret_code);
1381 } else {
1382 ret = 0;
1383 DBG("Relayd successfully created trace chunk: chunk_id = %" PRIu64,
1384 chunk_id);
1385 }
1386
1387 end:
1388 lttng_dynamic_buffer_reset(&payload);
1389 return ret;
1390 }
1391
1392 int relayd_close_trace_chunk(struct lttcomm_relayd_sock *sock,
1393 struct lttng_trace_chunk *chunk,
1394 char *path)
1395 {
1396 int ret = 0;
1397 enum lttng_trace_chunk_status status;
1398 struct lttcomm_relayd_close_trace_chunk msg = {};
1399 struct lttcomm_relayd_close_trace_chunk_reply reply = {};
1400 uint64_t chunk_id;
1401 time_t close_timestamp;
1402 LTTNG_OPTIONAL(enum lttng_trace_chunk_command_type) close_command = {};
1403
1404 if (!relayd_supports_chunks(sock)) {
1405 DBG("Refusing to close remote trace chunk: relayd does not support chunks");
1406 goto end;
1407 }
1408
1409 status = lttng_trace_chunk_get_id(chunk, &chunk_id);
1410 if (status != LTTNG_TRACE_CHUNK_STATUS_OK) {
1411 ERR("Failed to get trace chunk id");
1412 ret = -1;
1413 goto end;
1414 }
1415
1416 status = lttng_trace_chunk_get_close_timestamp(chunk, &close_timestamp);
1417 if (status != LTTNG_TRACE_CHUNK_STATUS_OK) {
1418 ERR("Failed to get trace chunk close timestamp");
1419 ret = -1;
1420 goto end;
1421 }
1422
1423 status = lttng_trace_chunk_get_close_command(chunk,
1424 &close_command.value);
1425 switch (status) {
1426 case LTTNG_TRACE_CHUNK_STATUS_OK:
1427 close_command.is_set = 1;
1428 break;
1429 case LTTNG_TRACE_CHUNK_STATUS_NONE:
1430 break;
1431 default:
1432 ERR("Failed to get trace chunk close command");
1433 ret = -1;
1434 goto end;
1435 }
1436
1437 msg = (typeof(msg)){
1438 .chunk_id = htobe64(chunk_id),
1439 .close_timestamp = htobe64((uint64_t) close_timestamp),
1440 .close_command = {
1441 .value = htobe32((uint32_t) close_command.value),
1442 .is_set = close_command.is_set,
1443 },
1444 };
1445
1446 ret = send_command(sock, RELAYD_CLOSE_TRACE_CHUNK, &msg, sizeof(msg),
1447 0);
1448 if (ret < 0) {
1449 ERR("Failed to send trace chunk close command to relay daemon");
1450 goto end;
1451 }
1452
1453 ret = recv_reply(sock, &reply, sizeof(reply));
1454 if (ret < 0) {
1455 ERR("Failed to receive relay daemon trace chunk close command reply");
1456 goto end;
1457 }
1458
1459 reply.path_length = be32toh(reply.path_length);
1460 if (reply.path_length >= LTTNG_PATH_MAX) {
1461 ERR("Chunk path too long");
1462 ret = -1;
1463 goto end;
1464 }
1465
1466 ret = recv_reply(sock, path, reply.path_length);
1467 if (ret < 0) {
1468 ERR("Failed to receive relay daemon trace chunk close command reply");
1469 goto end;
1470 }
1471 if (path[reply.path_length - 1] != '\0') {
1472 ERR("Invalid trace chunk path returned by relay daemon (not null-terminated)");
1473 ret = -1;
1474 goto end;
1475 }
1476
1477 reply.generic.ret_code = be32toh(reply.generic.ret_code);
1478 if (reply.generic.ret_code != LTTNG_OK) {
1479 ret = -1;
1480 ERR("Relayd trace chunk close replied error %d",
1481 reply.generic.ret_code);
1482 } else {
1483 ret = 0;
1484 DBG("Relayd successfully closed trace chunk: chunk_id = %" PRIu64,
1485 chunk_id);
1486 }
1487 end:
1488 return ret;
1489 }
1490
1491 int relayd_trace_chunk_exists(struct lttcomm_relayd_sock *sock,
1492 uint64_t chunk_id, bool *chunk_exists)
1493 {
1494 int ret = 0;
1495 struct lttcomm_relayd_trace_chunk_exists msg = {};
1496 struct lttcomm_relayd_trace_chunk_exists_reply reply = {};
1497
1498 if (!relayd_supports_chunks(sock)) {
1499 DBG("Refusing to check for trace chunk existence: relayd does not support chunks");
1500 /* The chunk will never exist */
1501 *chunk_exists = false;
1502 goto end;
1503 }
1504
1505 msg = (typeof(msg)){
1506 .chunk_id = htobe64(chunk_id),
1507 };
1508
1509 ret = send_command(sock, RELAYD_TRACE_CHUNK_EXISTS, &msg, sizeof(msg),
1510 0);
1511 if (ret < 0) {
1512 ERR("Failed to send trace chunk exists command to relay daemon");
1513 goto end;
1514 }
1515
1516 ret = recv_reply(sock, &reply, sizeof(reply));
1517 if (ret < 0) {
1518 ERR("Failed to receive relay daemon trace chunk close command reply");
1519 goto end;
1520 }
1521
1522 reply.generic.ret_code = be32toh(reply.generic.ret_code);
1523 if (reply.generic.ret_code != LTTNG_OK) {
1524 ret = -1;
1525 ERR("Relayd trace chunk close replied error %d",
1526 reply.generic.ret_code);
1527 } else {
1528 ret = 0;
1529 DBG("Relayd successfully checked trace chunk existence: chunk_id = %" PRIu64
1530 ", exists = %s", chunk_id,
1531 reply.trace_chunk_exists ? "true" : "false");
1532 *chunk_exists = !!reply.trace_chunk_exists;
1533 }
1534 end:
1535 return ret;
1536 }
1537
1538 int relayd_get_configuration(struct lttcomm_relayd_sock *sock,
1539 uint64_t query_flags,
1540 uint64_t *result_flags)
1541 {
1542 int ret = 0;
1543 struct lttcomm_relayd_get_configuration msg = (typeof(msg)) {
1544 .query_flags = htobe64(query_flags),
1545 };
1546 struct lttcomm_relayd_get_configuration_reply reply = {};
1547
1548 if (!relayd_supports_get_configuration(sock)) {
1549 DBG("Refusing to get relayd configuration (unsupported by relayd)");
1550 if (query_flags) {
1551 ret = -1;
1552 goto end;
1553 }
1554 *result_flags = 0;
1555 goto end;
1556 }
1557
1558 ret = send_command(sock, RELAYD_GET_CONFIGURATION, &msg, sizeof(msg),
1559 0);
1560 if (ret < 0) {
1561 ERR("Failed to send get configuration command to relay daemon");
1562 goto end;
1563 }
1564
1565 ret = recv_reply(sock, &reply, sizeof(reply));
1566 if (ret < 0) {
1567 ERR("Failed to receive relay daemon get configuration command reply");
1568 goto end;
1569 }
1570
1571 reply.generic.ret_code = be32toh(reply.generic.ret_code);
1572 if (reply.generic.ret_code != LTTNG_OK) {
1573 ret = -1;
1574 ERR("Relayd get configuration replied error %d",
1575 reply.generic.ret_code);
1576 } else {
1577 reply.relayd_configuration_flags =
1578 be64toh(reply.relayd_configuration_flags);
1579 ret = 0;
1580 DBG("Relayd successfully got configuration: query_flags = %" PRIu64
1581 ", results_flags = %" PRIu64, query_flags,
1582 reply.relayd_configuration_flags);
1583 *result_flags = reply.relayd_configuration_flags;
1584 }
1585 end:
1586 return ret;
1587 }
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