2 * SPDX-License-Identifier: MIT
4 * Copyright 2019 Francis Deslauriers <francis.deslauriers@efficios.com>
5 * Copyright 2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
8 #define BT_COMP_LOG_SELF_COMP (viewer_connection->self_comp)
9 #define BT_LOG_OUTPUT_LEVEL (viewer_connection->log_level)
10 #define BT_LOG_TAG "PLUGIN/SRC.CTF.LTTNG-LIVE/VIEWER"
11 #include "logging/comp-logging.h"
18 #include <sys/types.h>
23 #include "compat/socket.h"
24 #include "compat/endian.h"
25 #include "compat/compiler.h"
26 #include "common/common.h"
27 #include <babeltrace2/babeltrace.h>
29 #include "lttng-live.h"
30 #include "viewer-connection.h"
31 #include "lttng-viewer-abi.h"
32 #include "data-stream.h"
35 #define viewer_handle_send_recv_status(_self_comp, _self_comp_class, \
36 _status, _action, _msg_str) \
39 case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED: \
41 case LTTNG_LIVE_VIEWER_STATUS_ERROR: \
42 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(_self_comp, \
43 _self_comp_class, "Error " _action " " _msg_str); \
50 #define viewer_handle_send_status(_self_comp, _self_comp_class, _status, _msg_str) \
51 viewer_handle_send_recv_status(_self_comp, _self_comp_class, _status, \
54 #define viewer_handle_recv_status(_self_comp, _self_comp_class, _status, _msg_str) \
55 viewer_handle_send_recv_status(_self_comp, _self_comp_class, _status, \
56 "receiving", _msg_str)
58 #define LTTNG_LIVE_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE_ERRNO(_self_comp, \
59 _self_comp_class, _msg, _fmt, ...) \
61 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(_self_comp, _self_comp_class, \
62 _msg ": %s" _fmt, bt_socket_errormsg(), ##__VA_ARGS__); \
66 const char *lttng_viewer_command_string(enum lttng_viewer_command cmd
)
69 case LTTNG_VIEWER_CONNECT
:
71 case LTTNG_VIEWER_LIST_SESSIONS
:
72 return "LIST_SESSIONS";
73 case LTTNG_VIEWER_ATTACH_SESSION
:
74 return "ATTACH_SESSION";
75 case LTTNG_VIEWER_GET_NEXT_INDEX
:
76 return "GET_NEXT_INDEX";
77 case LTTNG_VIEWER_GET_PACKET
:
79 case LTTNG_VIEWER_GET_METADATA
:
80 return "GET_METADATA";
81 case LTTNG_VIEWER_GET_NEW_STREAMS
:
82 return "GET_NEW_STREAMS";
83 case LTTNG_VIEWER_CREATE_SESSION
:
84 return "CREATE_SESSION";
85 case LTTNG_VIEWER_DETACH_SESSION
:
86 return "DETACH_SESSION";
93 const char *lttng_viewer_next_index_return_code_string(
94 enum lttng_viewer_next_index_return_code code
)
97 case LTTNG_VIEWER_INDEX_OK
:
99 case LTTNG_VIEWER_INDEX_RETRY
:
100 return "INDEX_RETRY";
101 case LTTNG_VIEWER_INDEX_HUP
:
103 case LTTNG_VIEWER_INDEX_ERR
:
105 case LTTNG_VIEWER_INDEX_INACTIVE
:
106 return "INDEX_INACTIVE";
107 case LTTNG_VIEWER_INDEX_EOF
:
115 const char *lttng_viewer_get_packet_return_code_string(
116 enum lttng_viewer_get_packet_return_code code
)
119 case LTTNG_VIEWER_GET_PACKET_OK
:
120 return "GET_PACKET_OK";
121 case LTTNG_VIEWER_GET_PACKET_RETRY
:
122 return "GET_PACKET_RETRY";
123 case LTTNG_VIEWER_GET_PACKET_ERR
:
124 return "GET_PACKET_ERR";
125 case LTTNG_VIEWER_GET_PACKET_EOF
:
126 return "GET_PACKET_EOF";
133 const char *lttng_viewer_seek_string(enum lttng_viewer_seek seek
)
136 case LTTNG_VIEWER_SEEK_BEGINNING
:
137 return "SEEK_BEGINNING";
138 case LTTNG_VIEWER_SEEK_LAST
:
146 enum lttng_live_iterator_status
viewer_status_to_live_iterator_status(
147 enum lttng_live_viewer_status viewer_status
)
149 switch (viewer_status
) {
150 case LTTNG_LIVE_VIEWER_STATUS_OK
:
151 return LTTNG_LIVE_ITERATOR_STATUS_OK
;
152 case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
:
153 return LTTNG_LIVE_ITERATOR_STATUS_AGAIN
;
154 case LTTNG_LIVE_VIEWER_STATUS_ERROR
:
155 return LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
162 enum ctf_msg_iter_medium_status
viewer_status_to_ctf_msg_iter_medium_status(
163 enum lttng_live_viewer_status viewer_status
)
165 switch (viewer_status
) {
166 case LTTNG_LIVE_VIEWER_STATUS_OK
:
167 return CTF_MSG_ITER_MEDIUM_STATUS_OK
;
168 case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
:
169 return CTF_MSG_ITER_MEDIUM_STATUS_AGAIN
;
170 case LTTNG_LIVE_VIEWER_STATUS_ERROR
:
171 return CTF_MSG_ITER_MEDIUM_STATUS_ERROR
;
178 void viewer_connection_close_socket(
179 struct live_viewer_connection
*viewer_connection
)
181 bt_self_component_class
*self_comp_class
=
182 viewer_connection
->self_comp_class
;
183 bt_self_component
*self_comp
=
184 viewer_connection
->self_comp
;
185 int ret
= bt_socket_close(viewer_connection
->control_sock
);
187 BT_COMP_OR_COMP_CLASS_LOGW_ERRNO(
188 self_comp
, self_comp_class
,
189 "Error closing viewer connection socket: ", ".");
192 viewer_connection
->control_sock
= BT_INVALID_SOCKET
;
196 * This function receives a message from the Relay daemon.
197 * If it received the entire message, it returns _OK,
198 * If it's interrupted, it returns _INTERRUPTED,
199 * otherwise, it returns _ERROR.
202 enum lttng_live_viewer_status
lttng_live_recv(
203 struct live_viewer_connection
*viewer_connection
,
204 void *buf
, size_t len
)
207 bt_self_component_class
*self_comp_class
=
208 viewer_connection
->self_comp_class
;
209 bt_self_component
*self_comp
=
210 viewer_connection
->self_comp
;
211 size_t total_received
= 0, to_receive
= len
;
212 struct lttng_live_msg_iter
*lttng_live_msg_iter
=
213 viewer_connection
->lttng_live_msg_iter
;
214 enum lttng_live_viewer_status status
;
215 BT_SOCKET sock
= viewer_connection
->control_sock
;
218 * Receive a message from the Relay.
221 received
= bt_socket_recv(sock
, buf
+ total_received
, to_receive
, 0);
222 if (received
== BT_SOCKET_ERROR
) {
223 if (bt_socket_interrupted()) {
224 if (lttng_live_graph_is_canceled(lttng_live_msg_iter
)) {
226 * This interruption was due to a
227 * SIGINT and the graph is being torn
230 status
= LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
;
231 lttng_live_msg_iter
->was_interrupted
= true;
235 * A signal was received, but the graph
236 * is not being torn down. Carry on.
242 * For any other types of socket error, close
243 * the socket and return an error.
245 LTTNG_LIVE_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE_ERRNO(
246 self_comp
, self_comp_class
,
247 "Error receiving from Relay", ".");
249 viewer_connection_close_socket(viewer_connection
);
250 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
253 } else if (received
== 0) {
255 * The recv() call returned 0. This means the
256 * connection was orderly shutdown from the other peer.
257 * If that happens when we are trying to receive
258 * a message from it, it means something when wrong.
259 * Close the socket and return an error.
261 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
262 self_comp_class
, "Remote side has closed connection");
263 viewer_connection_close_socket(viewer_connection
);
264 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
268 BT_ASSERT(received
<= to_receive
);
269 total_received
+= received
;
270 to_receive
-= received
;
272 } while (to_receive
> 0);
274 BT_ASSERT(total_received
== len
);
275 status
= LTTNG_LIVE_VIEWER_STATUS_OK
;
282 * This function sends a message to the Relay daemon.
283 * If it send the message, it returns _OK,
284 * If it's interrupted, it returns _INTERRUPTED,
285 * otherwise, it returns _ERROR.
288 enum lttng_live_viewer_status
lttng_live_send(
289 struct live_viewer_connection
*viewer_connection
,
290 const void *buf
, size_t len
)
292 enum lttng_live_viewer_status status
;
293 bt_self_component_class
*self_comp_class
=
294 viewer_connection
->self_comp_class
;
295 bt_self_component
*self_comp
=
296 viewer_connection
->self_comp
;
297 struct lttng_live_msg_iter
*lttng_live_msg_iter
=
298 viewer_connection
->lttng_live_msg_iter
;
299 BT_SOCKET sock
= viewer_connection
->control_sock
;
300 size_t to_send
= len
;
301 ssize_t total_sent
= 0;
304 ssize_t sent
= bt_socket_send_nosigpipe(sock
, buf
+ total_sent
,
306 if (sent
== BT_SOCKET_ERROR
) {
307 if (bt_socket_interrupted()) {
308 if (lttng_live_graph_is_canceled(lttng_live_msg_iter
)) {
310 * This interruption was a SIGINT and
311 * the graph is being teared down.
313 status
= LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
;
314 lttng_live_msg_iter
->was_interrupted
= true;
318 * A signal was received, but the graph
319 * is not being teared down. Carry on.
325 * For any other types of socket error, close
326 * the socket and return an error.
328 LTTNG_LIVE_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE_ERRNO(
329 self_comp
, self_comp_class
,
330 "Error sending to Relay", ".");
332 viewer_connection_close_socket(viewer_connection
);
333 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
338 BT_ASSERT(sent
<= to_send
);
342 } while (to_send
> 0);
344 BT_ASSERT(total_sent
== len
);
345 status
= LTTNG_LIVE_VIEWER_STATUS_OK
;
352 int parse_url(struct live_viewer_connection
*viewer_connection
)
354 char error_buf
[256] = { 0 };
355 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
356 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
357 struct bt_common_lttng_live_url_parts lttng_live_url_parts
= { 0 };
359 const char *path
= viewer_connection
->url
->str
;
365 lttng_live_url_parts
= bt_common_parse_lttng_live_url(path
, error_buf
,
367 if (!lttng_live_url_parts
.proto
) {
368 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
369 self_comp_class
,"Invalid LTTng live URL format: %s",
373 viewer_connection
->proto
= lttng_live_url_parts
.proto
;
374 lttng_live_url_parts
.proto
= NULL
;
376 viewer_connection
->relay_hostname
= lttng_live_url_parts
.hostname
;
377 lttng_live_url_parts
.hostname
= NULL
;
379 if (lttng_live_url_parts
.port
>= 0) {
380 viewer_connection
->port
= lttng_live_url_parts
.port
;
382 viewer_connection
->port
= LTTNG_DEFAULT_NETWORK_VIEWER_PORT
;
385 viewer_connection
->target_hostname
= lttng_live_url_parts
.target_hostname
;
386 lttng_live_url_parts
.target_hostname
= NULL
;
388 if (lttng_live_url_parts
.session_name
) {
389 viewer_connection
->session_name
= lttng_live_url_parts
.session_name
;
390 lttng_live_url_parts
.session_name
= NULL
;
396 bt_common_destroy_lttng_live_url_parts(<tng_live_url_parts
);
401 enum lttng_live_viewer_status
lttng_live_handshake(
402 struct live_viewer_connection
*viewer_connection
)
404 struct lttng_viewer_cmd cmd
;
405 struct lttng_viewer_connect connect
;
406 enum lttng_live_viewer_status status
;
407 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
408 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
409 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(connect
);
410 char cmd_buf
[cmd_buf_len
];
412 BT_COMP_OR_COMP_CLASS_LOGD(self_comp
, self_comp_class
,
413 "Handshaking with the relay daemon: cmd=%s, major-version=%u, minor-version=%u",
414 lttng_viewer_command_string(LTTNG_VIEWER_CONNECT
), LTTNG_LIVE_MAJOR
,
417 cmd
.cmd
= htobe32(LTTNG_VIEWER_CONNECT
);
418 cmd
.data_size
= htobe64((uint64_t) sizeof(connect
));
419 cmd
.cmd_version
= htobe32(0);
421 connect
.viewer_session_id
= -1ULL; /* will be set on recv */
422 connect
.major
= htobe32(LTTNG_LIVE_MAJOR
);
423 connect
.minor
= htobe32(LTTNG_LIVE_MINOR
);
424 connect
.type
= htobe32(LTTNG_VIEWER_CLIENT_COMMAND
);
427 * Merge the cmd and connection request to prevent a write-write
428 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
429 * second write to be performed quickly in presence of Nagle's algorithm
431 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
432 memcpy(cmd_buf
+ sizeof(cmd
), &connect
, sizeof(connect
));
434 status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
435 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
436 viewer_handle_send_status(self_comp
, self_comp_class
,
437 status
, "viewer connect command");
441 status
= lttng_live_recv(viewer_connection
, &connect
, sizeof(connect
));
442 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
443 viewer_handle_recv_status(self_comp
, self_comp_class
,
444 status
, "viewer connect reply");
448 BT_COMP_OR_COMP_CLASS_LOGI(self_comp
, self_comp_class
,
449 "Received viewer session ID : %" PRIu64
,
450 (uint64_t) be64toh(connect
.viewer_session_id
));
451 BT_COMP_OR_COMP_CLASS_LOGI(self_comp
, self_comp_class
,
452 "Relayd version : %u.%u", be32toh(connect
.major
),
453 be32toh(connect
.minor
));
455 if (LTTNG_LIVE_MAJOR
!= be32toh(connect
.major
)) {
456 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
457 self_comp_class
, "Incompatible lttng-relayd protocol");
458 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
461 /* Use the smallest protocol version implemented. */
462 if (LTTNG_LIVE_MINOR
> be32toh(connect
.minor
)) {
463 viewer_connection
->minor
= be32toh(connect
.minor
);
465 viewer_connection
->minor
= LTTNG_LIVE_MINOR
;
467 viewer_connection
->major
= LTTNG_LIVE_MAJOR
;
469 status
= LTTNG_LIVE_VIEWER_STATUS_OK
;
478 enum lttng_live_viewer_status
lttng_live_connect_viewer(
479 struct live_viewer_connection
*viewer_connection
)
481 struct hostent
*host
;
482 struct sockaddr_in server_addr
;
483 enum lttng_live_viewer_status status
;
484 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
485 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
487 if (parse_url(viewer_connection
)) {
488 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
489 self_comp_class
, "Failed to parse URL");
490 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
494 BT_COMP_OR_COMP_CLASS_LOGD(self_comp
, self_comp_class
,
495 "Connecting to hostname : %s, port : %d, "
496 "target hostname : %s, session name : %s, proto : %s",
497 viewer_connection
->relay_hostname
->str
,
498 viewer_connection
->port
,
499 !viewer_connection
->target_hostname
?
500 "<none>" : viewer_connection
->target_hostname
->str
,
501 !viewer_connection
->session_name
?
502 "<none>" : viewer_connection
->session_name
->str
,
503 viewer_connection
->proto
->str
);
505 host
= gethostbyname(viewer_connection
->relay_hostname
->str
);
507 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
508 self_comp_class
, "Cannot lookup hostname: hostname=\"%s\"",
509 viewer_connection
->relay_hostname
->str
);
510 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
514 if ((viewer_connection
->control_sock
= socket(AF_INET
, SOCK_STREAM
, 0)) == BT_INVALID_SOCKET
) {
515 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
516 self_comp_class
, "Socket creation failed: %s", bt_socket_errormsg());
517 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
521 server_addr
.sin_family
= AF_INET
;
522 server_addr
.sin_port
= htons(viewer_connection
->port
);
523 server_addr
.sin_addr
= *((struct in_addr
*) host
->h_addr
);
524 memset(&(server_addr
.sin_zero
), 0, 8);
526 if (connect(viewer_connection
->control_sock
, (struct sockaddr
*) &server_addr
,
527 sizeof(struct sockaddr
)) == BT_SOCKET_ERROR
) {
528 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
529 self_comp_class
, "Connection failed: %s",
530 bt_socket_errormsg());
531 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
535 status
= lttng_live_handshake(viewer_connection
);
538 * Only print error and append cause in case of error. not in case of
541 if (status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
542 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
543 self_comp_class
, "Viewer handshake failed");
545 } else if (status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
552 if (viewer_connection
->control_sock
!= BT_INVALID_SOCKET
) {
553 if (bt_socket_close(viewer_connection
->control_sock
) == BT_SOCKET_ERROR
) {
554 BT_COMP_OR_COMP_CLASS_LOGW(self_comp
, self_comp_class
,
555 "Error closing socket: %s.", bt_socket_errormsg());
558 viewer_connection
->control_sock
= BT_INVALID_SOCKET
;
564 void lttng_live_disconnect_viewer(
565 struct live_viewer_connection
*viewer_connection
)
567 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
568 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
570 if (viewer_connection
->control_sock
== BT_INVALID_SOCKET
) {
573 if (bt_socket_close(viewer_connection
->control_sock
) == BT_SOCKET_ERROR
) {
574 BT_COMP_OR_COMP_CLASS_LOGW(self_comp
, self_comp_class
,
575 "Error closing socket: %s", bt_socket_errormsg());
576 viewer_connection
->control_sock
= BT_INVALID_SOCKET
;
581 int list_update_session(bt_value
*results
,
582 const struct lttng_viewer_session
*session
,
583 bool *_found
, struct live_viewer_connection
*viewer_connection
)
585 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
586 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
589 bt_value
*map
= NULL
;
590 bt_value
*hostname
= NULL
;
591 bt_value
*session_name
= NULL
;
592 bt_value
*btval
= NULL
;
595 len
= bt_value_array_get_length(results
);
596 for (i
= 0; i
< len
; i
++) {
597 const char *hostname_str
= NULL
;
598 const char *session_name_str
= NULL
;
600 map
= bt_value_array_borrow_element_by_index(results
, i
);
601 hostname
= bt_value_map_borrow_entry_value(map
, "target-hostname");
603 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
605 "Error borrowing \"target-hostname\" entry.");
609 session_name
= bt_value_map_borrow_entry_value(map
, "session-name");
611 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
613 "Error borrowing \"session-name\" entry.");
617 hostname_str
= bt_value_string_get(hostname
);
618 session_name_str
= bt_value_string_get(session_name
);
620 if (strcmp(session
->hostname
, hostname_str
) == 0
621 && strcmp(session
->session_name
, session_name_str
) == 0) {
623 uint32_t streams
= be32toh(session
->streams
);
624 uint32_t clients
= be32toh(session
->clients
);
628 btval
= bt_value_map_borrow_entry_value(map
, "stream-count");
630 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(
631 self_comp
, self_comp_class
,
632 "Error borrowing \"stream-count\" entry.");
636 val
= bt_value_integer_unsigned_get(btval
);
639 bt_value_integer_unsigned_set(btval
, val
);
641 btval
= bt_value_map_borrow_entry_value(map
, "client-count");
643 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(
644 self_comp
, self_comp_class
,
645 "Error borrowing \"client-count\" entry.");
649 val
= bt_value_integer_unsigned_get(btval
);
651 val
= bt_max_t(int64_t, clients
, val
);
652 bt_value_integer_unsigned_set(btval
, val
);
665 int list_append_session(bt_value
*results
,
667 const struct lttng_viewer_session
*session
,
668 struct live_viewer_connection
*viewer_connection
)
671 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
672 bt_value_map_insert_entry_status insert_status
;
673 bt_value_array_append_element_status append_status
;
674 bt_value
*map
= NULL
;
679 * If the session already exists, add the stream count to it,
680 * and do max of client counts.
682 ret
= list_update_session(results
, session
, &found
, viewer_connection
);
687 map
= bt_value_map_create();
689 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
690 "Error creating map value.");
695 if (base_url
->len
< 1) {
696 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
697 "Error: base_url length smaller than 1.");
705 url
= g_string_new(base_url
->str
);
706 g_string_append(url
, "/host/");
707 g_string_append(url
, session
->hostname
);
708 g_string_append_c(url
, '/');
709 g_string_append(url
, session
->session_name
);
711 insert_status
= bt_value_map_insert_string_entry(map
, "url", url
->str
);
712 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
713 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
714 "Error inserting \"url\" entry.");
720 * key = "target-hostname",
723 insert_status
= bt_value_map_insert_string_entry(map
, "target-hostname",
725 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
726 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
727 "Error inserting \"target-hostname\" entry.");
733 * key = "session-name",
736 insert_status
= bt_value_map_insert_string_entry(map
, "session-name",
737 session
->session_name
);
738 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
739 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
740 "Error inserting \"session-name\" entry.");
750 uint32_t live_timer
= be32toh(session
->live_timer
);
752 insert_status
= bt_value_map_insert_unsigned_integer_entry(
753 map
, "timer-us", live_timer
);
754 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
755 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
756 "Error inserting \"timer-us\" entry.");
763 * key = "stream-count",
767 uint32_t streams
= be32toh(session
->streams
);
769 insert_status
= bt_value_map_insert_unsigned_integer_entry(map
,
770 "stream-count", streams
);
771 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
772 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
773 "Error inserting \"stream-count\" entry.");
780 * key = "client-count",
784 uint32_t clients
= be32toh(session
->clients
);
786 insert_status
= bt_value_map_insert_unsigned_integer_entry(map
,
787 "client-count", clients
);
788 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
789 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
790 "Error inserting \"client-count\" entry.");
796 append_status
= bt_value_array_append_element(results
, map
);
797 if (append_status
!= BT_VALUE_ARRAY_APPEND_ELEMENT_STATUS_OK
) {
798 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
799 "Error appending map to results.");
805 g_string_free(url
, true);
807 BT_VALUE_PUT_REF_AND_RESET(map
);
812 * Data structure returned:
823 * key = "target-hostname",
827 * key = "session-name",
835 * key = "stream-count",
839 * key = "client-count",
848 bt_component_class_query_method_status
live_viewer_connection_list_sessions(
849 struct live_viewer_connection
*viewer_connection
,
850 const bt_value
**user_result
)
852 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
853 bt_component_class_query_method_status status
=
854 BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK
;
855 bt_value
*result
= NULL
;
856 enum lttng_live_viewer_status viewer_status
;
857 struct lttng_viewer_cmd cmd
;
858 struct lttng_viewer_list_sessions list
;
859 uint32_t i
, sessions_count
;
861 result
= bt_value_array_create();
863 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
864 "Error creating array");
865 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR
;
869 BT_LOGD("Requesting list of sessions: cmd=%s",
870 lttng_viewer_command_string(LTTNG_VIEWER_LIST_SESSIONS
));
872 cmd
.cmd
= htobe32(LTTNG_VIEWER_LIST_SESSIONS
);
873 cmd
.data_size
= htobe64((uint64_t) 0);
874 cmd
.cmd_version
= htobe32(0);
876 viewer_status
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
877 if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
878 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
879 "Error sending list sessions command");
880 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
882 } else if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
883 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_AGAIN
;
887 viewer_status
= lttng_live_recv(viewer_connection
, &list
, sizeof(list
));
888 if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
889 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
890 "Error receiving session list");
891 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
893 } else if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
894 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_AGAIN
;
898 sessions_count
= be32toh(list
.sessions_count
);
899 for (i
= 0; i
< sessions_count
; i
++) {
900 struct lttng_viewer_session lsession
;
902 viewer_status
= lttng_live_recv(viewer_connection
, &lsession
,
904 if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
905 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
906 "Error receiving session:");
907 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
909 } else if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
910 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_AGAIN
;
914 lsession
.hostname
[LTTNG_VIEWER_HOST_NAME_MAX
- 1] = '\0';
915 lsession
.session_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
916 if (list_append_session(result
, viewer_connection
->url
,
917 &lsession
, viewer_connection
)) {
918 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
919 "Error appending session");
920 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
925 *user_result
= result
;
928 BT_VALUE_PUT_REF_AND_RESET(result
);
934 enum lttng_live_viewer_status
lttng_live_query_session_ids(
935 struct lttng_live_msg_iter
*lttng_live_msg_iter
)
937 struct lttng_viewer_cmd cmd
;
938 struct lttng_viewer_list_sessions list
;
939 struct lttng_viewer_session lsession
;
940 uint32_t i
, sessions_count
;
942 enum lttng_live_viewer_status status
;
943 struct live_viewer_connection
*viewer_connection
=
944 lttng_live_msg_iter
->viewer_connection
;
945 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
946 bt_self_component_class
*self_comp_class
=
947 viewer_connection
->self_comp_class
;
949 BT_COMP_LOGD("Asking the relay daemon for the list of sessions: cmd=%s",
950 lttng_viewer_command_string(LTTNG_VIEWER_LIST_SESSIONS
));
952 cmd
.cmd
= htobe32(LTTNG_VIEWER_LIST_SESSIONS
);
953 cmd
.data_size
= htobe64((uint64_t) 0);
954 cmd
.cmd_version
= htobe32(0);
956 status
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
957 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
958 viewer_handle_send_status(self_comp
, self_comp_class
,
959 status
, "list sessions command");
963 status
= lttng_live_recv(viewer_connection
, &list
, sizeof(list
));
964 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
965 viewer_handle_recv_status(self_comp
, self_comp_class
,
966 status
, "session list reply");
970 sessions_count
= be32toh(list
.sessions_count
);
971 for (i
= 0; i
< sessions_count
; i
++) {
972 status
= lttng_live_recv(viewer_connection
, &lsession
,
974 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
975 viewer_handle_recv_status(self_comp
, self_comp_class
,
976 status
, "session reply");
979 lsession
.hostname
[LTTNG_VIEWER_HOST_NAME_MAX
- 1] = '\0';
980 lsession
.session_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
981 session_id
= be64toh(lsession
.id
);
983 BT_COMP_LOGI("Adding session to internal list: "
984 "session-id=%" PRIu64
", hostname=\"%s\", session-name=\"%s\"",
985 session_id
, lsession
.hostname
, lsession
.session_name
);
987 if ((strncmp(lsession
.session_name
,
988 viewer_connection
->session_name
->str
,
989 LTTNG_VIEWER_NAME_MAX
) == 0) && (strncmp(lsession
.hostname
,
990 viewer_connection
->target_hostname
->str
,
991 LTTNG_VIEWER_HOST_NAME_MAX
) == 0)) {
993 if (lttng_live_add_session(lttng_live_msg_iter
, session_id
,
995 lsession
.session_name
)) {
996 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
997 "Failed to add live session");
998 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1004 status
= LTTNG_LIVE_VIEWER_STATUS_OK
;
1011 enum lttng_live_viewer_status
lttng_live_create_viewer_session(
1012 struct lttng_live_msg_iter
*lttng_live_msg_iter
)
1014 struct lttng_viewer_cmd cmd
;
1015 struct lttng_viewer_create_session_response resp
;
1016 enum lttng_live_viewer_status status
;
1017 struct live_viewer_connection
*viewer_connection
=
1018 lttng_live_msg_iter
->viewer_connection
;
1019 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1020 bt_self_component_class
*self_comp_class
=
1021 viewer_connection
->self_comp_class
;
1023 BT_COMP_OR_COMP_CLASS_LOGD(self_comp
, self_comp_class
,
1024 "Creating a viewer session: cmd=%s",
1025 lttng_viewer_command_string(LTTNG_VIEWER_CREATE_SESSION
));
1027 cmd
.cmd
= htobe32(LTTNG_VIEWER_CREATE_SESSION
);
1028 cmd
.data_size
= htobe64((uint64_t) 0);
1029 cmd
.cmd_version
= htobe32(0);
1031 status
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
1032 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1033 viewer_handle_send_status(self_comp
, self_comp_class
,
1034 status
, "create session command");
1038 status
= lttng_live_recv(viewer_connection
, &resp
, sizeof(resp
));
1039 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1040 viewer_handle_recv_status(self_comp
, self_comp_class
,
1041 status
, "create session reply");
1045 if (be32toh(resp
.status
) != LTTNG_VIEWER_CREATE_SESSION_OK
) {
1046 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1047 "Error creating viewer session");
1048 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1052 status
= lttng_live_query_session_ids(lttng_live_msg_iter
);
1053 if (status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
1054 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1055 "Failed to query live viewer session ids");
1057 } else if (status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
1066 enum lttng_live_viewer_status
receive_streams(struct lttng_live_session
*session
,
1067 uint32_t stream_count
,
1068 bt_self_message_iterator
*self_msg_iter
)
1071 struct lttng_live_msg_iter
*lttng_live_msg_iter
=
1072 session
->lttng_live_msg_iter
;
1073 enum lttng_live_viewer_status status
;
1074 struct live_viewer_connection
*viewer_connection
=
1075 lttng_live_msg_iter
->viewer_connection
;
1076 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1078 BT_COMP_LOGI("Getting %" PRIu32
" new streams", stream_count
);
1079 for (i
= 0; i
< stream_count
; i
++) {
1080 struct lttng_viewer_stream stream
;
1081 struct lttng_live_stream_iterator
*live_stream
;
1083 uint64_t ctf_trace_id
;
1085 status
= lttng_live_recv(viewer_connection
, &stream
,
1087 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1088 viewer_handle_recv_status(self_comp
, NULL
,
1089 status
, "stream reply");
1092 stream
.path_name
[LTTNG_VIEWER_PATH_MAX
- 1] = '\0';
1093 stream
.channel_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
1094 stream_id
= be64toh(stream
.id
);
1095 ctf_trace_id
= be64toh(stream
.ctf_trace_id
);
1097 if (stream
.metadata_flag
) {
1098 BT_COMP_LOGI(" metadata stream %" PRIu64
" : %s/%s",
1099 stream_id
, stream
.path_name
, stream
.channel_name
);
1100 if (lttng_live_metadata_create_stream(session
,
1101 ctf_trace_id
, stream_id
,
1102 stream
.path_name
)) {
1103 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1104 "Error creating metadata stream");
1105 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1108 session
->lazy_stream_msg_init
= true;
1110 BT_COMP_LOGI(" stream %" PRIu64
" : %s/%s",
1111 stream_id
, stream
.path_name
, stream
.channel_name
);
1112 live_stream
= lttng_live_stream_iterator_create(session
,
1113 ctf_trace_id
, stream_id
, self_msg_iter
);
1115 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1116 "Error creating stream");
1117 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1122 status
= LTTNG_LIVE_VIEWER_STATUS_OK
;
1129 enum lttng_live_viewer_status
lttng_live_session_attach(
1130 struct lttng_live_session
*session
,
1131 bt_self_message_iterator
*self_msg_iter
)
1133 struct lttng_viewer_cmd cmd
;
1134 enum lttng_live_viewer_status status
;
1135 struct lttng_viewer_attach_session_request rq
;
1136 struct lttng_viewer_attach_session_response rp
;
1137 struct lttng_live_msg_iter
*lttng_live_msg_iter
=
1138 session
->lttng_live_msg_iter
;
1139 struct live_viewer_connection
*viewer_connection
=
1140 lttng_live_msg_iter
->viewer_connection
;
1141 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1142 uint64_t session_id
= session
->id
;
1143 uint32_t streams_count
;
1144 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1145 char cmd_buf
[cmd_buf_len
];
1147 BT_COMP_LOGD("Attaching to session: cmd=%s, session-id=%" PRIu64
1149 lttng_viewer_command_string(LTTNG_VIEWER_ATTACH_SESSION
),
1151 lttng_viewer_seek_string(LTTNG_VIEWER_SEEK_LAST
));
1153 cmd
.cmd
= htobe32(LTTNG_VIEWER_ATTACH_SESSION
);
1154 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1155 cmd
.cmd_version
= htobe32(0);
1157 memset(&rq
, 0, sizeof(rq
));
1158 rq
.session_id
= htobe64(session_id
);
1159 // TODO: add cmd line parameter to select seek beginning
1160 // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING);
1161 rq
.seek
= htobe32(LTTNG_VIEWER_SEEK_LAST
);
1164 * Merge the cmd and connection request to prevent a write-write
1165 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1166 * second write to be performed quickly in presence of Nagle's algorithm.
1168 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1169 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1170 status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1171 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1172 viewer_handle_send_status(self_comp
, NULL
,
1173 status
, "attach session command");
1177 status
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1178 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1179 viewer_handle_recv_status(self_comp
, NULL
,
1180 status
, "attach session reply");
1184 streams_count
= be32toh(rp
.streams_count
);
1185 switch(be32toh(rp
.status
)) {
1186 case LTTNG_VIEWER_ATTACH_OK
:
1188 case LTTNG_VIEWER_ATTACH_UNK
:
1189 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1190 "Session id %" PRIu64
" is unknown", session_id
);
1191 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1193 case LTTNG_VIEWER_ATTACH_ALREADY
:
1194 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1195 "There is already a viewer attached to this session");
1196 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1198 case LTTNG_VIEWER_ATTACH_NOT_LIVE
:
1199 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Not a live session");
1200 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1202 case LTTNG_VIEWER_ATTACH_SEEK_ERR
:
1203 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Wrong seek parameter");
1204 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1207 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1208 "Unknown attach return code %u", be32toh(rp
.status
));
1209 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1213 /* We receive the initial list of streams. */
1214 status
= receive_streams(session
, streams_count
, self_msg_iter
);
1216 case LTTNG_LIVE_VIEWER_STATUS_OK
:
1218 case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
:
1220 case LTTNG_LIVE_VIEWER_STATUS_ERROR
:
1221 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Error receiving streams");
1227 session
->attached
= true;
1228 session
->new_streams_needed
= false;
1235 enum lttng_live_viewer_status
lttng_live_session_detach(
1236 struct lttng_live_session
*session
)
1238 struct lttng_viewer_cmd cmd
;
1239 enum lttng_live_viewer_status status
;
1240 struct lttng_viewer_detach_session_request rq
;
1241 struct lttng_viewer_detach_session_response rp
;
1242 struct lttng_live_msg_iter
*lttng_live_msg_iter
=
1243 session
->lttng_live_msg_iter
;
1244 bt_self_component
*self_comp
= session
->self_comp
;
1245 struct live_viewer_connection
*viewer_connection
=
1246 lttng_live_msg_iter
->viewer_connection
;
1247 uint64_t session_id
= session
->id
;
1248 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1249 char cmd_buf
[cmd_buf_len
];
1252 * The session might already be detached and the viewer socket might
1253 * already been closed. This happens when calling this function when
1254 * tearing down the graph after an error.
1256 if (!session
->attached
|| viewer_connection
->control_sock
== BT_INVALID_SOCKET
) {
1260 BT_COMP_LOGD("Detaching from session: cmd=%s, session-id=%" PRIu64
,
1261 lttng_viewer_command_string(LTTNG_VIEWER_DETACH_SESSION
),
1264 cmd
.cmd
= htobe32(LTTNG_VIEWER_DETACH_SESSION
);
1265 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1266 cmd
.cmd_version
= htobe32(0);
1268 memset(&rq
, 0, sizeof(rq
));
1269 rq
.session_id
= htobe64(session_id
);
1272 * Merge the cmd and connection request to prevent a write-write
1273 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1274 * second write to be performed quickly in presence of Nagle's algorithm.
1276 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1277 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1278 status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1279 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1280 viewer_handle_send_status(self_comp
, NULL
,
1281 status
, "detach session command");
1285 status
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1286 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1287 viewer_handle_recv_status(self_comp
, NULL
,
1288 status
, "detach session reply");
1292 switch(be32toh(rp
.status
)) {
1293 case LTTNG_VIEWER_DETACH_SESSION_OK
:
1295 case LTTNG_VIEWER_DETACH_SESSION_UNK
:
1296 BT_COMP_LOGW("Session id %" PRIu64
" is unknown", session_id
);
1297 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1299 case LTTNG_VIEWER_DETACH_SESSION_ERR
:
1300 BT_COMP_LOGW("Error detaching session id %" PRIu64
"", session_id
);
1301 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1304 BT_COMP_LOGE("Unknown detach return code %u", be32toh(rp
.status
));
1305 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1309 session
->attached
= false;
1311 status
= LTTNG_LIVE_VIEWER_STATUS_OK
;
1318 enum lttng_live_get_one_metadata_status
lttng_live_get_one_metadata_packet(
1319 struct lttng_live_trace
*trace
, FILE *fp
, size_t *reply_len
)
1322 enum lttng_live_get_one_metadata_status status
;
1323 enum lttng_live_viewer_status viewer_status
;
1324 struct lttng_viewer_cmd cmd
;
1325 struct lttng_viewer_get_metadata rq
;
1326 struct lttng_viewer_metadata_packet rp
;
1329 struct lttng_live_session
*session
= trace
->session
;
1330 struct lttng_live_msg_iter
*lttng_live_msg_iter
=
1331 session
->lttng_live_msg_iter
;
1332 struct lttng_live_metadata
*metadata
= trace
->metadata
;
1333 struct live_viewer_connection
*viewer_connection
=
1334 lttng_live_msg_iter
->viewer_connection
;
1335 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1336 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1337 char cmd_buf
[cmd_buf_len
];
1339 BT_COMP_LOGD("Requesting new metadata for trace:"
1340 "cmd=%s, trace-id=%" PRIu64
", metadata-stream-id=%" PRIu64
,
1341 lttng_viewer_command_string(LTTNG_VIEWER_GET_METADATA
),
1342 trace
->id
, metadata
->stream_id
);
1344 rq
.stream_id
= htobe64(metadata
->stream_id
);
1345 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_METADATA
);
1346 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1347 cmd
.cmd_version
= htobe32(0);
1350 * Merge the cmd and connection request to prevent a write-write
1351 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1352 * second write to be performed quickly in presence of Nagle's algorithm.
1354 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1355 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1356 viewer_status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1357 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1358 viewer_handle_send_status(self_comp
, NULL
,
1359 viewer_status
, "get metadata command");
1360 status
= (enum lttng_live_get_one_metadata_status
) viewer_status
;
1364 viewer_status
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1365 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1366 viewer_handle_recv_status(self_comp
, NULL
,
1367 viewer_status
, "get metadata reply");
1368 status
= (enum lttng_live_get_one_metadata_status
) viewer_status
;
1372 switch (be32toh(rp
.status
)) {
1373 case LTTNG_VIEWER_METADATA_OK
:
1374 BT_COMP_LOGD("Received get_metadata response: ok");
1376 case LTTNG_VIEWER_NO_NEW_METADATA
:
1377 BT_COMP_LOGD("Received get_metadata response: no new");
1378 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_END
;
1380 case LTTNG_VIEWER_METADATA_ERR
:
1382 * The Relayd cannot find this stream id. Maybe its
1383 * gone already. This can happen in short lived UST app
1384 * in a per-pid session.
1386 BT_COMP_LOGD("Received get_metadata response: error");
1387 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_CLOSED
;
1390 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1391 "Received get_metadata response: unknown");
1392 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR
;
1396 len
= be64toh(rp
.len
);
1397 BT_COMP_LOGD("Writing %" PRIu64
" bytes to metadata", len
);
1399 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1400 "Erroneous response length");
1401 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR
;
1405 data
= g_new0(gchar
, len
);
1407 BT_COMP_LOGE_APPEND_CAUSE_ERRNO(self_comp
,
1408 "Failed to allocate data buffer", ".");
1409 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR
;
1413 viewer_status
= lttng_live_recv(viewer_connection
, data
, len
);
1414 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1415 viewer_handle_recv_status(self_comp
, NULL
,
1416 viewer_status
, "get metadata packet");
1417 status
= (enum lttng_live_get_one_metadata_status
) viewer_status
;
1422 * Write the metadata to the file handle.
1424 writelen
= fwrite(data
, sizeof(uint8_t), len
, fp
);
1425 if (writelen
!= len
) {
1426 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1427 "Writing in the metadata file stream");
1428 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR
;
1433 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_OK
;
1441 * Assign the fields from a lttng_viewer_index to a packet_index.
1444 void lttng_index_to_packet_index(struct lttng_viewer_index
*lindex
,
1445 struct packet_index
*pindex
)
1450 pindex
->offset
= be64toh(lindex
->offset
);
1451 pindex
->packet_size
= be64toh(lindex
->packet_size
);
1452 pindex
->content_size
= be64toh(lindex
->content_size
);
1453 pindex
->ts_cycles
.timestamp_begin
= be64toh(lindex
->timestamp_begin
);
1454 pindex
->ts_cycles
.timestamp_end
= be64toh(lindex
->timestamp_end
);
1455 pindex
->events_discarded
= be64toh(lindex
->events_discarded
);
1459 void lttng_live_need_new_streams(struct lttng_live_msg_iter
*lttng_live_msg_iter
)
1461 uint64_t session_idx
;
1462 struct live_viewer_connection
*viewer_connection
=
1463 lttng_live_msg_iter
->viewer_connection
;
1465 for (session_idx
= 0; session_idx
< lttng_live_msg_iter
->sessions
->len
;
1467 struct lttng_live_session
*session
=
1468 g_ptr_array_index(lttng_live_msg_iter
->sessions
, session_idx
);
1469 BT_COMP_LOGD("Marking session as needing new streams: "
1470 "session-id=%" PRIu64
, session
->id
);
1471 session
->new_streams_needed
= true;
1476 enum lttng_live_iterator_status
lttng_live_get_next_index(
1477 struct lttng_live_msg_iter
*lttng_live_msg_iter
,
1478 struct lttng_live_stream_iterator
*stream
,
1479 struct packet_index
*index
)
1481 struct lttng_viewer_cmd cmd
;
1482 struct lttng_viewer_get_next_index rq
;
1483 enum lttng_live_viewer_status viewer_status
;
1484 struct lttng_viewer_index rp
;
1485 enum lttng_live_iterator_status status
;
1486 struct live_viewer_connection
*viewer_connection
=
1487 lttng_live_msg_iter
->viewer_connection
;
1488 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1489 struct lttng_live_trace
*trace
= stream
->trace
;
1490 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1491 char cmd_buf
[cmd_buf_len
];
1492 uint32_t flags
, rp_status
;
1494 BT_COMP_LOGD("Requesting next index for stream: cmd=%s, "
1495 "viewer-stream-id=%" PRIu64
,
1496 lttng_viewer_command_string(LTTNG_VIEWER_GET_NEXT_INDEX
),
1497 stream
->viewer_stream_id
);
1498 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_NEXT_INDEX
);
1499 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1500 cmd
.cmd_version
= htobe32(0);
1502 memset(&rq
, 0, sizeof(rq
));
1503 rq
.stream_id
= htobe64(stream
->viewer_stream_id
);
1506 * Merge the cmd and connection request to prevent a write-write
1507 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1508 * second write to be performed quickly in presence of Nagle's algorithm.
1510 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1511 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1513 viewer_status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1514 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1515 viewer_handle_send_status(self_comp
, NULL
,
1516 viewer_status
, "get next index command");
1520 viewer_status
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1521 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1522 viewer_handle_recv_status(self_comp
, NULL
,
1523 viewer_status
, "get next index reply");
1527 flags
= be32toh(rp
.flags
);
1528 rp_status
= be32toh(rp
.status
);
1530 BT_COMP_LOGD("Received response from relay daemon: cmd=%s, response=%s",
1531 lttng_viewer_command_string(LTTNG_VIEWER_GET_NEXT_INDEX
),
1532 lttng_viewer_next_index_return_code_string(rp_status
));
1533 switch (rp_status
) {
1534 case LTTNG_VIEWER_INDEX_INACTIVE
:
1536 uint64_t ctf_stream_class_id
;
1538 memset(index
, 0, sizeof(struct packet_index
));
1539 index
->ts_cycles
.timestamp_end
= be64toh(rp
.timestamp_end
);
1540 stream
->current_inactivity_ts
= index
->ts_cycles
.timestamp_end
;
1541 ctf_stream_class_id
= be64toh(rp
.stream_id
);
1542 if (stream
->ctf_stream_class_id
!= -1ULL) {
1543 BT_ASSERT(stream
->ctf_stream_class_id
==
1544 ctf_stream_class_id
);
1546 stream
->ctf_stream_class_id
= ctf_stream_class_id
;
1548 lttng_live_stream_iterator_set_state(stream
, LTTNG_LIVE_STREAM_QUIESCENT
);
1549 status
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
1552 case LTTNG_VIEWER_INDEX_OK
:
1554 uint64_t ctf_stream_class_id
;
1556 lttng_index_to_packet_index(&rp
, index
);
1557 ctf_stream_class_id
= be64toh(rp
.stream_id
);
1558 if (stream
->ctf_stream_class_id
!= -1ULL) {
1559 BT_ASSERT(stream
->ctf_stream_class_id
==
1560 ctf_stream_class_id
);
1562 stream
->ctf_stream_class_id
= ctf_stream_class_id
;
1565 lttng_live_stream_iterator_set_state(stream
, LTTNG_LIVE_STREAM_ACTIVE_DATA
);
1567 if (flags
& LTTNG_VIEWER_FLAG_NEW_METADATA
) {
1568 BT_COMP_LOGD("Marking trace as needing new metadata: "
1569 "response=%s, response-flag=NEW_METADATA, trace-id=%" PRIu64
,
1570 lttng_viewer_next_index_return_code_string(rp_status
),
1572 trace
->metadata_stream_state
= LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED
;
1574 if (flags
& LTTNG_VIEWER_FLAG_NEW_STREAM
) {
1575 BT_COMP_LOGD("Marking all sessions as possibly needing new streams: "
1576 "response=%s, response-flag=NEW_STREAM",
1577 lttng_viewer_next_index_return_code_string(rp_status
));
1578 lttng_live_need_new_streams(lttng_live_msg_iter
);
1580 status
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
1583 case LTTNG_VIEWER_INDEX_RETRY
:
1584 memset(index
, 0, sizeof(struct packet_index
));
1585 lttng_live_stream_iterator_set_state(stream
, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
);
1586 status
= LTTNG_LIVE_ITERATOR_STATUS_AGAIN
;
1588 case LTTNG_VIEWER_INDEX_HUP
:
1589 memset(index
, 0, sizeof(struct packet_index
));
1590 index
->offset
= EOF
;
1591 lttng_live_stream_iterator_set_state(stream
, LTTNG_LIVE_STREAM_EOF
);
1592 stream
->has_stream_hung_up
= true;
1593 status
= LTTNG_LIVE_ITERATOR_STATUS_END
;
1595 case LTTNG_VIEWER_INDEX_ERR
:
1596 memset(index
, 0, sizeof(struct packet_index
));
1597 lttng_live_stream_iterator_set_state(stream
, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
);
1598 status
= LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
1601 BT_COMP_LOGD("Received get_next_index response: unknown value");
1602 memset(index
, 0, sizeof(struct packet_index
));
1603 lttng_live_stream_iterator_set_state(stream
, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
);
1604 status
= LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
1610 status
= viewer_status_to_live_iterator_status(viewer_status
);
1616 enum ctf_msg_iter_medium_status
lttng_live_get_stream_bytes(
1617 struct lttng_live_msg_iter
*lttng_live_msg_iter
,
1618 struct lttng_live_stream_iterator
*stream
, uint8_t *buf
,
1619 uint64_t offset
, uint64_t req_len
, uint64_t *recv_len
)
1621 enum ctf_msg_iter_medium_status status
;
1622 enum lttng_live_viewer_status viewer_status
;
1623 struct lttng_viewer_trace_packet rp
;
1624 struct lttng_viewer_cmd cmd
;
1625 struct lttng_viewer_get_packet rq
;
1626 struct live_viewer_connection
*viewer_connection
=
1627 lttng_live_msg_iter
->viewer_connection
;
1628 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1629 struct lttng_live_trace
*trace
= stream
->trace
;
1630 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1631 char cmd_buf
[cmd_buf_len
];
1632 uint32_t flags
, rp_status
;
1634 BT_COMP_LOGD("Requesting data from stream: cmd=%s, "
1635 "offset=%" PRIu64
", request-len=%" PRIu64
,
1636 lttng_viewer_command_string(LTTNG_VIEWER_GET_PACKET
),
1639 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_PACKET
);
1640 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1641 cmd
.cmd_version
= htobe32(0);
1643 memset(&rq
, 0, sizeof(rq
));
1644 rq
.stream_id
= htobe64(stream
->viewer_stream_id
);
1645 rq
.offset
= htobe64(offset
);
1646 rq
.len
= htobe32(req_len
);
1649 * Merge the cmd and connection request to prevent a write-write
1650 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1651 * second write to be performed quickly in presence of Nagle's algorithm.
1653 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1654 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1656 viewer_status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1657 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1658 viewer_handle_send_status(self_comp
, NULL
,
1659 viewer_status
, "get data packet command");
1660 goto error_convert_status
;
1663 viewer_status
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1664 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1665 viewer_handle_recv_status(self_comp
, NULL
,
1666 viewer_status
, "get data packet reply");
1667 goto error_convert_status
;
1670 flags
= be32toh(rp
.flags
);
1671 rp_status
= be32toh(rp
.status
);
1673 BT_COMP_LOGD("Received response from relay daemon: cmd=%s, response=%s",
1674 lttng_viewer_command_string(LTTNG_VIEWER_GET_PACKET
),
1675 lttng_viewer_get_packet_return_code_string(rp_status
));
1676 switch (rp_status
) {
1677 case LTTNG_VIEWER_GET_PACKET_OK
:
1678 req_len
= be32toh(rp
.len
);
1679 BT_COMP_LOGD("Got packet from relay daemon: response=%s, packet-len=%" PRIu64
"",
1680 lttng_viewer_get_packet_return_code_string(rp_status
),
1682 status
= CTF_MSG_ITER_MEDIUM_STATUS_OK
;
1684 case LTTNG_VIEWER_GET_PACKET_RETRY
:
1685 /* Unimplemented by relay daemon */
1686 status
= CTF_MSG_ITER_MEDIUM_STATUS_AGAIN
;
1688 case LTTNG_VIEWER_GET_PACKET_ERR
:
1689 if (flags
& LTTNG_VIEWER_FLAG_NEW_METADATA
) {
1690 BT_COMP_LOGD("Marking trace as needing new metadata: "
1691 "response=%s, response-flag=NEW_METADATA, trace-id=%" PRIu64
,
1692 lttng_viewer_next_index_return_code_string(rp_status
),
1694 trace
->metadata_stream_state
= LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED
;
1696 if (flags
& LTTNG_VIEWER_FLAG_NEW_STREAM
) {
1697 BT_COMP_LOGD("Marking all sessions as possibly needing new streams: "
1698 "response=%s, response-flag=NEW_STREAM",
1699 lttng_viewer_next_index_return_code_string(rp_status
));
1700 lttng_live_need_new_streams(lttng_live_msg_iter
);
1702 if (flags
& (LTTNG_VIEWER_FLAG_NEW_METADATA
1703 | LTTNG_VIEWER_FLAG_NEW_STREAM
)) {
1704 status
= CTF_MSG_ITER_MEDIUM_STATUS_AGAIN
;
1705 BT_COMP_LOGD("Reply with any one flags set means we should retry: response=%s",
1706 lttng_viewer_get_packet_return_code_string(rp_status
));
1709 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1710 "Received get_data_packet response: error");
1711 status
= CTF_MSG_ITER_MEDIUM_STATUS_ERROR
;
1713 case LTTNG_VIEWER_GET_PACKET_EOF
:
1714 status
= CTF_MSG_ITER_MEDIUM_STATUS_EOF
;
1717 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1718 "Received get_data_packet response: unknown (%d)", rp_status
);
1719 status
= CTF_MSG_ITER_MEDIUM_STATUS_ERROR
;
1724 status
= CTF_MSG_ITER_MEDIUM_STATUS_ERROR
;
1728 viewer_status
= lttng_live_recv(viewer_connection
, buf
, req_len
);
1729 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1730 viewer_handle_recv_status(self_comp
, NULL
,
1731 viewer_status
, "get data packet");
1732 goto error_convert_status
;
1734 *recv_len
= req_len
;
1736 status
= CTF_MSG_ITER_MEDIUM_STATUS_OK
;
1739 error_convert_status
:
1740 status
= viewer_status_to_ctf_msg_iter_medium_status(viewer_status
);
1746 * Request new streams for a session.
1749 enum lttng_live_iterator_status
lttng_live_session_get_new_streams(
1750 struct lttng_live_session
*session
,
1751 bt_self_message_iterator
*self_msg_iter
)
1753 enum lttng_live_iterator_status status
=
1754 LTTNG_LIVE_ITERATOR_STATUS_OK
;
1755 struct lttng_viewer_cmd cmd
;
1756 struct lttng_viewer_new_streams_request rq
;
1757 struct lttng_viewer_new_streams_response rp
;
1758 struct lttng_live_msg_iter
*lttng_live_msg_iter
=
1759 session
->lttng_live_msg_iter
;
1760 enum lttng_live_viewer_status viewer_status
;
1761 struct live_viewer_connection
*viewer_connection
=
1762 lttng_live_msg_iter
->viewer_connection
;
1763 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1764 uint32_t streams_count
;
1765 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1766 char cmd_buf
[cmd_buf_len
];
1768 if (!session
->new_streams_needed
) {
1769 status
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
1773 BT_COMP_LOGD("Requesting new streams for session: cmd=%s"
1774 "session-id=%" PRIu64
,
1775 lttng_viewer_command_string(LTTNG_VIEWER_GET_NEW_STREAMS
),
1778 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_NEW_STREAMS
);
1779 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1780 cmd
.cmd_version
= htobe32(0);
1782 memset(&rq
, 0, sizeof(rq
));
1783 rq
.session_id
= htobe64(session
->id
);
1786 * Merge the cmd and connection request to prevent a write-write
1787 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1788 * second write to be performed quickly in presence of Nagle's algorithm.
1790 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1791 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1793 viewer_status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1794 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1795 viewer_handle_send_status(self_comp
, NULL
,
1796 viewer_status
, "get new streams command");
1797 status
= viewer_status_to_live_iterator_status(viewer_status
);
1801 viewer_status
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1802 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1803 viewer_handle_recv_status(self_comp
, NULL
,
1804 viewer_status
, "get new streams reply");
1805 status
= viewer_status_to_live_iterator_status(viewer_status
);
1809 streams_count
= be32toh(rp
.streams_count
);
1811 switch(be32toh(rp
.status
)) {
1812 case LTTNG_VIEWER_NEW_STREAMS_OK
:
1813 session
->new_streams_needed
= false;
1815 case LTTNG_VIEWER_NEW_STREAMS_NO_NEW
:
1816 session
->new_streams_needed
= false;
1818 case LTTNG_VIEWER_NEW_STREAMS_HUP
:
1819 session
->new_streams_needed
= false;
1820 session
->closed
= true;
1821 status
= LTTNG_LIVE_ITERATOR_STATUS_END
;
1823 case LTTNG_VIEWER_NEW_STREAMS_ERR
:
1824 BT_COMP_LOGD("Received get_new_streams response: error");
1825 status
= LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
1828 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1829 "Received get_new_streams response: Unknown:"
1830 "return code %u", be32toh(rp
.status
));
1831 status
= LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
1835 viewer_status
= receive_streams(session
, streams_count
, self_msg_iter
);
1836 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1837 viewer_handle_recv_status(self_comp
, NULL
,
1838 viewer_status
, "new streams");
1839 status
= viewer_status_to_live_iterator_status(viewer_status
);
1843 status
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
1849 enum lttng_live_viewer_status
live_viewer_connection_create(
1850 bt_self_component
*self_comp
,
1851 bt_self_component_class
*self_comp_class
,
1852 bt_logging_level log_level
,
1853 const char *url
, bool in_query
,
1854 struct lttng_live_msg_iter
*lttng_live_msg_iter
,
1855 struct live_viewer_connection
**viewer
)
1857 struct live_viewer_connection
*viewer_connection
;
1858 enum lttng_live_viewer_status status
;
1860 viewer_connection
= g_new0(struct live_viewer_connection
, 1);
1862 if (bt_socket_init(log_level
) != 0) {
1863 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
1864 self_comp_class
, "Failed to init socket");
1865 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1869 viewer_connection
->log_level
= log_level
;
1871 viewer_connection
->self_comp
= self_comp
;
1872 viewer_connection
->self_comp_class
= self_comp_class
;
1874 viewer_connection
->control_sock
= BT_INVALID_SOCKET
;
1875 viewer_connection
->port
= -1;
1876 viewer_connection
->in_query
= in_query
;
1877 viewer_connection
->lttng_live_msg_iter
= lttng_live_msg_iter
;
1878 viewer_connection
->url
= g_string_new(url
);
1879 if (!viewer_connection
->url
) {
1880 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
1881 self_comp_class
, "Failed to allocate URL buffer");
1882 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1886 BT_COMP_OR_COMP_CLASS_LOGD(self_comp
, self_comp_class
,
1887 "Establishing connection to url \"%s\"...", url
);
1888 status
= lttng_live_connect_viewer(viewer_connection
);
1890 * Only print error and append cause in case of error. not in case of
1893 if (status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
1894 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
1895 self_comp_class
, "Failed to establish connection: "
1898 } else if (status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
1901 BT_COMP_OR_COMP_CLASS_LOGD(self_comp
, self_comp_class
,
1902 "Connection to url \"%s\" is established", url
);
1904 *viewer
= viewer_connection
;
1905 status
= LTTNG_LIVE_VIEWER_STATUS_OK
;
1909 if (viewer_connection
) {
1910 live_viewer_connection_destroy(viewer_connection
);
1917 void live_viewer_connection_destroy(
1918 struct live_viewer_connection
*viewer_connection
)
1920 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1921 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
1923 if (!viewer_connection
) {
1927 BT_COMP_OR_COMP_CLASS_LOGD(self_comp
, self_comp_class
,
1928 "Closing connection to relay:"
1929 "relay-url=\"%s\"", viewer_connection
->url
->str
);
1931 lttng_live_disconnect_viewer(viewer_connection
);
1933 if (viewer_connection
->url
) {
1934 g_string_free(viewer_connection
->url
, true);
1937 if (viewer_connection
->relay_hostname
) {
1938 g_string_free(viewer_connection
->relay_hostname
, true);
1941 if (viewer_connection
->target_hostname
) {
1942 g_string_free(viewer_connection
->target_hostname
, true);
1945 if (viewer_connection
->session_name
) {
1946 g_string_free(viewer_connection
->session_name
, true);
1949 if (viewer_connection
->proto
) {
1950 g_string_free(viewer_connection
->proto
, true);
1953 g_free(viewer_connection
);