2 * SPDX-License-Identifier: MIT
4 * Copyright 2019 Francis Deslauriers <francis.deslauriers@efficios.com>
5 * Copyright 2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
12 #include <babeltrace2/babeltrace.h>
14 #define BT_COMP_LOG_SELF_COMP (viewer_connection->self_comp)
15 #define BT_LOG_OUTPUT_LEVEL (viewer_connection->log_level)
16 #define BT_LOG_TAG "PLUGIN/SRC.CTF.LTTNG-LIVE/VIEWER"
17 #include "logging/comp-logging.h"
19 #include "common/common.h"
20 #include "compat/endian.h"
21 #include "compat/socket.h"
23 #include "data-stream.hpp"
24 #include "lttng-live.hpp"
25 #include "lttng-viewer-abi.hpp"
26 #include "metadata.hpp"
27 #include "viewer-connection.hpp"
29 #define viewer_handle_send_recv_status(_self_comp, _self_comp_class, _status, _action, _msg_str) \
32 case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED: \
34 case LTTNG_LIVE_VIEWER_STATUS_ERROR: \
35 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(_self_comp, _self_comp_class, \
36 "Error " _action " " _msg_str); \
43 #define viewer_handle_send_status(_self_comp, _self_comp_class, _status, _msg_str) \
44 viewer_handle_send_recv_status(_self_comp, _self_comp_class, _status, "sending", _msg_str)
46 #define viewer_handle_recv_status(_self_comp, _self_comp_class, _status, _msg_str) \
47 viewer_handle_send_recv_status(_self_comp, _self_comp_class, _status, "receiving", _msg_str)
49 #define LTTNG_LIVE_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE_ERRNO(_self_comp, _self_comp_class, _msg, \
52 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(_self_comp, _self_comp_class, _msg ": %s" _fmt, \
53 bt_socket_errormsg(), ##__VA_ARGS__); \
56 static const char *lttng_viewer_command_string(enum lttng_viewer_command cmd
)
59 case LTTNG_VIEWER_CONNECT
:
61 case LTTNG_VIEWER_LIST_SESSIONS
:
62 return "LIST_SESSIONS";
63 case LTTNG_VIEWER_ATTACH_SESSION
:
64 return "ATTACH_SESSION";
65 case LTTNG_VIEWER_GET_NEXT_INDEX
:
66 return "GET_NEXT_INDEX";
67 case LTTNG_VIEWER_GET_PACKET
:
69 case LTTNG_VIEWER_GET_METADATA
:
70 return "GET_METADATA";
71 case LTTNG_VIEWER_GET_NEW_STREAMS
:
72 return "GET_NEW_STREAMS";
73 case LTTNG_VIEWER_CREATE_SESSION
:
74 return "CREATE_SESSION";
75 case LTTNG_VIEWER_DETACH_SESSION
:
76 return "DETACH_SESSION";
83 lttng_viewer_next_index_return_code_string(enum lttng_viewer_next_index_return_code code
)
86 case LTTNG_VIEWER_INDEX_OK
:
88 case LTTNG_VIEWER_INDEX_RETRY
:
90 case LTTNG_VIEWER_INDEX_HUP
:
92 case LTTNG_VIEWER_INDEX_ERR
:
94 case LTTNG_VIEWER_INDEX_INACTIVE
:
95 return "INDEX_INACTIVE";
96 case LTTNG_VIEWER_INDEX_EOF
:
103 static const char *lttng_viewer_next_index_return_code_string(uint32_t code
)
105 return lttng_viewer_next_index_return_code_string((lttng_viewer_next_index_return_code
) code
);
109 lttng_viewer_get_packet_return_code_string(enum lttng_viewer_get_packet_return_code code
)
112 case LTTNG_VIEWER_GET_PACKET_OK
:
113 return "GET_PACKET_OK";
114 case LTTNG_VIEWER_GET_PACKET_RETRY
:
115 return "GET_PACKET_RETRY";
116 case LTTNG_VIEWER_GET_PACKET_ERR
:
117 return "GET_PACKET_ERR";
118 case LTTNG_VIEWER_GET_PACKET_EOF
:
119 return "GET_PACKET_EOF";
125 static const char *lttng_viewer_get_packet_return_code_string(uint32_t code
)
127 return lttng_viewer_get_packet_return_code_string((lttng_viewer_get_packet_return_code
) code
);
130 static const char *lttng_viewer_seek_string(enum lttng_viewer_seek seek
)
133 case LTTNG_VIEWER_SEEK_BEGINNING
:
134 return "SEEK_BEGINNING";
135 case LTTNG_VIEWER_SEEK_LAST
:
142 static inline enum lttng_live_iterator_status
143 viewer_status_to_live_iterator_status(enum lttng_live_viewer_status viewer_status
)
145 switch (viewer_status
) {
146 case LTTNG_LIVE_VIEWER_STATUS_OK
:
147 return LTTNG_LIVE_ITERATOR_STATUS_OK
;
148 case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
:
149 return LTTNG_LIVE_ITERATOR_STATUS_AGAIN
;
150 case LTTNG_LIVE_VIEWER_STATUS_ERROR
:
151 return LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
157 static inline enum ctf_msg_iter_medium_status
158 viewer_status_to_ctf_msg_iter_medium_status(enum lttng_live_viewer_status viewer_status
)
160 switch (viewer_status
) {
161 case LTTNG_LIVE_VIEWER_STATUS_OK
:
162 return CTF_MSG_ITER_MEDIUM_STATUS_OK
;
163 case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
:
164 return CTF_MSG_ITER_MEDIUM_STATUS_AGAIN
;
165 case LTTNG_LIVE_VIEWER_STATUS_ERROR
:
166 return CTF_MSG_ITER_MEDIUM_STATUS_ERROR
;
172 static inline void viewer_connection_close_socket(struct live_viewer_connection
*viewer_connection
)
174 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
175 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
176 int ret
= bt_socket_close(viewer_connection
->control_sock
);
178 BT_COMP_OR_COMP_CLASS_LOGW_ERRNO(self_comp
, self_comp_class
,
179 "Error closing viewer connection socket: ", ".");
182 viewer_connection
->control_sock
= BT_INVALID_SOCKET
;
186 * This function receives a message from the Relay daemon.
187 * If it received the entire message, it returns _OK,
188 * If it's interrupted, it returns _INTERRUPTED,
189 * otherwise, it returns _ERROR.
191 static enum lttng_live_viewer_status
192 lttng_live_recv(struct live_viewer_connection
*viewer_connection
, void *buf
, size_t len
)
195 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
196 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
197 size_t total_received
= 0, to_receive
= len
;
198 struct lttng_live_msg_iter
*lttng_live_msg_iter
= viewer_connection
->lttng_live_msg_iter
;
199 enum lttng_live_viewer_status status
;
200 BT_SOCKET sock
= viewer_connection
->control_sock
;
203 * Receive a message from the Relay.
206 received
= bt_socket_recv(sock
, (char *) buf
+ total_received
, to_receive
, 0);
207 if (received
== BT_SOCKET_ERROR
) {
208 if (bt_socket_interrupted()) {
209 if (lttng_live_graph_is_canceled(lttng_live_msg_iter
)) {
211 * This interruption was due to a
212 * SIGINT and the graph is being torn
215 status
= LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
;
216 lttng_live_msg_iter
->was_interrupted
= true;
220 * A signal was received, but the graph
221 * is not being torn down. Carry on.
227 * For any other types of socket error, close
228 * the socket and return an error.
230 LTTNG_LIVE_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE_ERRNO(
231 self_comp
, self_comp_class
, "Error receiving from Relay", ".");
233 viewer_connection_close_socket(viewer_connection
);
234 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
237 } else if (received
== 0) {
239 * The recv() call returned 0. This means the
240 * connection was orderly shutdown from the other peer.
241 * If that happens when we are trying to receive
242 * a message from it, it means something when wrong.
243 * Close the socket and return an error.
245 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
246 "Remote side has closed connection");
247 viewer_connection_close_socket(viewer_connection
);
248 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
252 BT_ASSERT(received
<= to_receive
);
253 total_received
+= received
;
254 to_receive
-= received
;
256 } while (to_receive
> 0);
258 BT_ASSERT(total_received
== len
);
259 status
= LTTNG_LIVE_VIEWER_STATUS_OK
;
266 * This function sends a message to the Relay daemon.
267 * If it send the message, it returns _OK,
268 * If it's interrupted, it returns _INTERRUPTED,
269 * otherwise, it returns _ERROR.
271 static enum lttng_live_viewer_status
272 lttng_live_send(struct live_viewer_connection
*viewer_connection
, const void *buf
, size_t len
)
274 enum lttng_live_viewer_status status
;
275 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
276 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
277 struct lttng_live_msg_iter
*lttng_live_msg_iter
= viewer_connection
->lttng_live_msg_iter
;
278 BT_SOCKET sock
= viewer_connection
->control_sock
;
279 size_t to_send
= len
;
280 ssize_t total_sent
= 0;
283 ssize_t sent
= bt_socket_send_nosigpipe(sock
, (char *) buf
+ total_sent
, to_send
);
284 if (sent
== BT_SOCKET_ERROR
) {
285 if (bt_socket_interrupted()) {
286 if (lttng_live_graph_is_canceled(lttng_live_msg_iter
)) {
288 * This interruption was a SIGINT and
289 * the graph is being teared down.
291 status
= LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
;
292 lttng_live_msg_iter
->was_interrupted
= true;
296 * A signal was received, but the graph
297 * is not being teared down. Carry on.
303 * For any other types of socket error, close
304 * the socket and return an error.
306 LTTNG_LIVE_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE_ERRNO(
307 self_comp
, self_comp_class
, "Error sending to Relay", ".");
309 viewer_connection_close_socket(viewer_connection
);
310 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
315 BT_ASSERT(sent
<= to_send
);
319 } while (to_send
> 0);
321 BT_ASSERT(total_sent
== len
);
322 status
= LTTNG_LIVE_VIEWER_STATUS_OK
;
328 static int parse_url(struct live_viewer_connection
*viewer_connection
)
330 char error_buf
[256] = {0};
331 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
332 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
333 struct bt_common_lttng_live_url_parts lttng_live_url_parts
= {};
335 const char *path
= viewer_connection
->url
->str
;
341 lttng_live_url_parts
= bt_common_parse_lttng_live_url(path
, error_buf
, sizeof(error_buf
));
342 if (!lttng_live_url_parts
.proto
) {
343 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
344 "Invalid LTTng live URL format: %s", error_buf
);
347 viewer_connection
->proto
= lttng_live_url_parts
.proto
;
348 lttng_live_url_parts
.proto
= NULL
;
350 viewer_connection
->relay_hostname
= lttng_live_url_parts
.hostname
;
351 lttng_live_url_parts
.hostname
= NULL
;
353 if (lttng_live_url_parts
.port
>= 0) {
354 viewer_connection
->port
= lttng_live_url_parts
.port
;
356 viewer_connection
->port
= LTTNG_DEFAULT_NETWORK_VIEWER_PORT
;
359 viewer_connection
->target_hostname
= lttng_live_url_parts
.target_hostname
;
360 lttng_live_url_parts
.target_hostname
= NULL
;
362 if (lttng_live_url_parts
.session_name
) {
363 viewer_connection
->session_name
= lttng_live_url_parts
.session_name
;
364 lttng_live_url_parts
.session_name
= NULL
;
370 bt_common_destroy_lttng_live_url_parts(<tng_live_url_parts
);
374 static enum lttng_live_viewer_status
375 lttng_live_handshake(struct live_viewer_connection
*viewer_connection
)
377 struct lttng_viewer_cmd cmd
;
378 struct lttng_viewer_connect connect
;
379 enum lttng_live_viewer_status status
;
380 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
381 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
382 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(connect
);
383 char cmd_buf
[cmd_buf_len
];
385 BT_COMP_OR_COMP_CLASS_LOGD(
386 self_comp
, self_comp_class
,
387 "Handshaking with the relay daemon: cmd=%s, major-version=%u, minor-version=%u",
388 lttng_viewer_command_string(LTTNG_VIEWER_CONNECT
), LTTNG_LIVE_MAJOR
, LTTNG_LIVE_MINOR
);
390 cmd
.cmd
= htobe32(LTTNG_VIEWER_CONNECT
);
391 cmd
.data_size
= htobe64((uint64_t) sizeof(connect
));
392 cmd
.cmd_version
= htobe32(0);
394 connect
.viewer_session_id
= -1ULL; /* will be set on recv */
395 connect
.major
= htobe32(LTTNG_LIVE_MAJOR
);
396 connect
.minor
= htobe32(LTTNG_LIVE_MINOR
);
397 connect
.type
= htobe32(LTTNG_VIEWER_CLIENT_COMMAND
);
400 * Merge the cmd and connection request to prevent a write-write
401 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
402 * second write to be performed quickly in presence of Nagle's algorithm
404 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
405 memcpy(cmd_buf
+ sizeof(cmd
), &connect
, sizeof(connect
));
407 status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
408 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
409 viewer_handle_send_status(self_comp
, self_comp_class
, status
, "viewer connect command");
413 status
= lttng_live_recv(viewer_connection
, &connect
, sizeof(connect
));
414 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
415 viewer_handle_recv_status(self_comp
, self_comp_class
, status
, "viewer connect reply");
419 BT_COMP_OR_COMP_CLASS_LOGI(self_comp
, self_comp_class
, "Received viewer session ID : %" PRIu64
,
420 (uint64_t) be64toh(connect
.viewer_session_id
));
421 BT_COMP_OR_COMP_CLASS_LOGI(self_comp
, self_comp_class
, "Relayd version : %u.%u",
422 be32toh(connect
.major
), be32toh(connect
.minor
));
424 if (LTTNG_LIVE_MAJOR
!= be32toh(connect
.major
)) {
425 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
426 "Incompatible lttng-relayd protocol");
427 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
430 /* Use the smallest protocol version implemented. */
431 if (LTTNG_LIVE_MINOR
> be32toh(connect
.minor
)) {
432 viewer_connection
->minor
= be32toh(connect
.minor
);
434 viewer_connection
->minor
= LTTNG_LIVE_MINOR
;
436 viewer_connection
->major
= LTTNG_LIVE_MAJOR
;
438 status
= LTTNG_LIVE_VIEWER_STATUS_OK
;
446 static enum lttng_live_viewer_status
447 lttng_live_connect_viewer(struct live_viewer_connection
*viewer_connection
)
449 struct hostent
*host
;
450 struct sockaddr_in server_addr
;
451 enum lttng_live_viewer_status status
;
452 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
453 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
455 if (parse_url(viewer_connection
)) {
456 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
, "Failed to parse URL");
457 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
461 BT_COMP_OR_COMP_CLASS_LOGD(
462 self_comp
, self_comp_class
,
463 "Connecting to hostname : %s, port : %d, "
464 "target hostname : %s, session name : %s, proto : %s",
465 viewer_connection
->relay_hostname
->str
, viewer_connection
->port
,
466 !viewer_connection
->target_hostname
? "<none>" : viewer_connection
->target_hostname
->str
,
467 !viewer_connection
->session_name
? "<none>" : viewer_connection
->session_name
->str
,
468 viewer_connection
->proto
->str
);
470 host
= gethostbyname(viewer_connection
->relay_hostname
->str
);
472 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
473 "Cannot lookup hostname: hostname=\"%s\"",
474 viewer_connection
->relay_hostname
->str
);
475 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
479 if ((viewer_connection
->control_sock
= socket(AF_INET
, SOCK_STREAM
, 0)) == BT_INVALID_SOCKET
) {
480 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
481 "Socket creation failed: %s", bt_socket_errormsg());
482 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
486 server_addr
.sin_family
= AF_INET
;
487 server_addr
.sin_port
= htons(viewer_connection
->port
);
488 server_addr
.sin_addr
= *((struct in_addr
*) host
->h_addr
);
489 memset(&(server_addr
.sin_zero
), 0, 8);
491 if (connect(viewer_connection
->control_sock
, (struct sockaddr
*) &server_addr
,
492 sizeof(struct sockaddr
)) == BT_SOCKET_ERROR
) {
493 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
, "Connection failed: %s",
494 bt_socket_errormsg());
495 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
499 status
= lttng_live_handshake(viewer_connection
);
502 * Only print error and append cause in case of error. not in case of
505 if (status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
506 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
507 "Viewer handshake failed");
509 } else if (status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
516 if (viewer_connection
->control_sock
!= BT_INVALID_SOCKET
) {
517 if (bt_socket_close(viewer_connection
->control_sock
) == BT_SOCKET_ERROR
) {
518 BT_COMP_OR_COMP_CLASS_LOGW(self_comp
, self_comp_class
, "Error closing socket: %s.",
519 bt_socket_errormsg());
522 viewer_connection
->control_sock
= BT_INVALID_SOCKET
;
527 static void lttng_live_disconnect_viewer(struct live_viewer_connection
*viewer_connection
)
529 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
530 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
532 if (viewer_connection
->control_sock
== BT_INVALID_SOCKET
) {
535 if (bt_socket_close(viewer_connection
->control_sock
) == BT_SOCKET_ERROR
) {
536 BT_COMP_OR_COMP_CLASS_LOGW(self_comp
, self_comp_class
, "Error closing socket: %s",
537 bt_socket_errormsg());
538 viewer_connection
->control_sock
= BT_INVALID_SOCKET
;
542 static int list_update_session(bt_value
*results
, const struct lttng_viewer_session
*session
,
543 bool *_found
, struct live_viewer_connection
*viewer_connection
)
545 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
546 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
549 bt_value
*map
= NULL
;
550 bt_value
*hostname
= NULL
;
551 bt_value
*session_name
= NULL
;
552 bt_value
*btval
= NULL
;
555 len
= bt_value_array_get_length(results
);
556 for (i
= 0; i
< len
; i
++) {
557 const char *hostname_str
= NULL
;
558 const char *session_name_str
= NULL
;
560 map
= bt_value_array_borrow_element_by_index(results
, i
);
561 hostname
= bt_value_map_borrow_entry_value(map
, "target-hostname");
563 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
564 "Error borrowing \"target-hostname\" entry.");
568 session_name
= bt_value_map_borrow_entry_value(map
, "session-name");
570 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
571 "Error borrowing \"session-name\" entry.");
575 hostname_str
= bt_value_string_get(hostname
);
576 session_name_str
= bt_value_string_get(session_name
);
578 if (strcmp(session
->hostname
, hostname_str
) == 0 &&
579 strcmp(session
->session_name
, session_name_str
) == 0) {
581 uint32_t streams
= be32toh(session
->streams
);
582 uint32_t clients
= be32toh(session
->clients
);
586 btval
= bt_value_map_borrow_entry_value(map
, "stream-count");
588 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
589 "Error borrowing \"stream-count\" entry.");
593 val
= bt_value_integer_unsigned_get(btval
);
596 bt_value_integer_unsigned_set(btval
, val
);
598 btval
= bt_value_map_borrow_entry_value(map
, "client-count");
600 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
601 "Error borrowing \"client-count\" entry.");
605 val
= bt_value_integer_unsigned_get(btval
);
607 val
= bt_max_t(int64_t, clients
, val
);
608 bt_value_integer_unsigned_set(btval
, val
);
620 static int list_append_session(bt_value
*results
, GString
*base_url
,
621 const struct lttng_viewer_session
*session
,
622 struct live_viewer_connection
*viewer_connection
)
625 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
626 bt_value_map_insert_entry_status insert_status
;
627 bt_value_array_append_element_status append_status
;
628 bt_value
*map
= NULL
;
633 * If the session already exists, add the stream count to it,
634 * and do max of client counts.
636 ret
= list_update_session(results
, session
, &found
, viewer_connection
);
641 map
= bt_value_map_create();
643 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error creating map value.");
648 if (base_url
->len
< 1) {
649 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error: base_url length smaller than 1.");
657 url
= g_string_new(base_url
->str
);
658 g_string_append(url
, "/host/");
659 g_string_append(url
, session
->hostname
);
660 g_string_append_c(url
, '/');
661 g_string_append(url
, session
->session_name
);
663 insert_status
= bt_value_map_insert_string_entry(map
, "url", url
->str
);
664 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
665 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error inserting \"url\" entry.");
671 * key = "target-hostname",
674 insert_status
= bt_value_map_insert_string_entry(map
, "target-hostname", session
->hostname
);
675 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
676 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
677 "Error inserting \"target-hostname\" entry.");
683 * key = "session-name",
686 insert_status
= bt_value_map_insert_string_entry(map
, "session-name", session
->session_name
);
687 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
688 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error inserting \"session-name\" entry.");
698 uint32_t live_timer
= be32toh(session
->live_timer
);
700 insert_status
= bt_value_map_insert_unsigned_integer_entry(map
, "timer-us", live_timer
);
701 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
702 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error inserting \"timer-us\" entry.");
709 * key = "stream-count",
713 uint32_t streams
= be32toh(session
->streams
);
715 insert_status
= bt_value_map_insert_unsigned_integer_entry(map
, "stream-count", streams
);
716 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
717 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
718 "Error inserting \"stream-count\" entry.");
725 * key = "client-count",
729 uint32_t clients
= be32toh(session
->clients
);
731 insert_status
= bt_value_map_insert_unsigned_integer_entry(map
, "client-count", clients
);
732 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
733 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
734 "Error inserting \"client-count\" entry.");
740 append_status
= bt_value_array_append_element(results
, map
);
741 if (append_status
!= BT_VALUE_ARRAY_APPEND_ELEMENT_STATUS_OK
) {
742 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error appending map to results.");
748 g_string_free(url
, true);
750 BT_VALUE_PUT_REF_AND_RESET(map
);
755 * Data structure returned:
766 * key = "target-hostname",
770 * key = "session-name",
778 * key = "stream-count",
782 * key = "client-count",
790 bt_component_class_query_method_status
791 live_viewer_connection_list_sessions(struct live_viewer_connection
*viewer_connection
,
792 const bt_value
**user_result
)
794 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
795 bt_component_class_query_method_status status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK
;
796 bt_value
*result
= NULL
;
797 enum lttng_live_viewer_status viewer_status
;
798 struct lttng_viewer_cmd cmd
;
799 struct lttng_viewer_list_sessions list
;
800 uint32_t i
, sessions_count
;
802 result
= bt_value_array_create();
804 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error creating array");
805 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR
;
809 BT_LOGD("Requesting list of sessions: cmd=%s",
810 lttng_viewer_command_string(LTTNG_VIEWER_LIST_SESSIONS
));
812 cmd
.cmd
= htobe32(LTTNG_VIEWER_LIST_SESSIONS
);
813 cmd
.data_size
= htobe64((uint64_t) 0);
814 cmd
.cmd_version
= htobe32(0);
816 viewer_status
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
817 if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
818 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error sending list sessions command");
819 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
821 } else if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
822 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_AGAIN
;
826 viewer_status
= lttng_live_recv(viewer_connection
, &list
, sizeof(list
));
827 if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
828 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error receiving session list");
829 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
831 } else if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
832 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_AGAIN
;
836 sessions_count
= be32toh(list
.sessions_count
);
837 for (i
= 0; i
< sessions_count
; i
++) {
838 struct lttng_viewer_session lsession
;
840 viewer_status
= lttng_live_recv(viewer_connection
, &lsession
, sizeof(lsession
));
841 if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
842 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error receiving session:");
843 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
845 } else if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
846 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_AGAIN
;
850 lsession
.hostname
[LTTNG_VIEWER_HOST_NAME_MAX
- 1] = '\0';
851 lsession
.session_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
852 if (list_append_session(result
, viewer_connection
->url
, &lsession
, viewer_connection
)) {
853 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error appending session");
854 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
859 *user_result
= result
;
862 BT_VALUE_PUT_REF_AND_RESET(result
);
867 static enum lttng_live_viewer_status
868 lttng_live_query_session_ids(struct lttng_live_msg_iter
*lttng_live_msg_iter
)
870 struct lttng_viewer_cmd cmd
;
871 struct lttng_viewer_list_sessions list
;
872 struct lttng_viewer_session lsession
;
873 uint32_t i
, sessions_count
;
875 enum lttng_live_viewer_status status
;
876 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
877 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
878 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
880 BT_COMP_LOGD("Asking the relay daemon for the list of sessions: cmd=%s",
881 lttng_viewer_command_string(LTTNG_VIEWER_LIST_SESSIONS
));
883 cmd
.cmd
= htobe32(LTTNG_VIEWER_LIST_SESSIONS
);
884 cmd
.data_size
= htobe64((uint64_t) 0);
885 cmd
.cmd_version
= htobe32(0);
887 status
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
888 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
889 viewer_handle_send_status(self_comp
, self_comp_class
, status
, "list sessions command");
893 status
= lttng_live_recv(viewer_connection
, &list
, sizeof(list
));
894 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
895 viewer_handle_recv_status(self_comp
, self_comp_class
, status
, "session list reply");
899 sessions_count
= be32toh(list
.sessions_count
);
900 for (i
= 0; i
< sessions_count
; i
++) {
901 status
= lttng_live_recv(viewer_connection
, &lsession
, sizeof(lsession
));
902 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
903 viewer_handle_recv_status(self_comp
, self_comp_class
, status
, "session reply");
906 lsession
.hostname
[LTTNG_VIEWER_HOST_NAME_MAX
- 1] = '\0';
907 lsession
.session_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
908 session_id
= be64toh(lsession
.id
);
910 BT_COMP_LOGI("Adding session to internal list: "
911 "session-id=%" PRIu64
", hostname=\"%s\", session-name=\"%s\"",
912 session_id
, lsession
.hostname
, lsession
.session_name
);
914 if ((strncmp(lsession
.session_name
, viewer_connection
->session_name
->str
,
915 LTTNG_VIEWER_NAME_MAX
) == 0) &&
916 (strncmp(lsession
.hostname
, viewer_connection
->target_hostname
->str
,
917 LTTNG_VIEWER_HOST_NAME_MAX
) == 0)) {
918 if (lttng_live_add_session(lttng_live_msg_iter
, session_id
, lsession
.hostname
,
919 lsession
.session_name
)) {
920 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Failed to add live session");
921 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
927 status
= LTTNG_LIVE_VIEWER_STATUS_OK
;
933 enum lttng_live_viewer_status
934 lttng_live_create_viewer_session(struct lttng_live_msg_iter
*lttng_live_msg_iter
)
936 struct lttng_viewer_cmd cmd
;
937 struct lttng_viewer_create_session_response resp
;
938 enum lttng_live_viewer_status status
;
939 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
940 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
941 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
943 BT_COMP_OR_COMP_CLASS_LOGD(self_comp
, self_comp_class
, "Creating a viewer session: cmd=%s",
944 lttng_viewer_command_string(LTTNG_VIEWER_CREATE_SESSION
));
946 cmd
.cmd
= htobe32(LTTNG_VIEWER_CREATE_SESSION
);
947 cmd
.data_size
= htobe64((uint64_t) 0);
948 cmd
.cmd_version
= htobe32(0);
950 status
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
951 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
952 viewer_handle_send_status(self_comp
, self_comp_class
, status
, "create session command");
956 status
= lttng_live_recv(viewer_connection
, &resp
, sizeof(resp
));
957 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
958 viewer_handle_recv_status(self_comp
, self_comp_class
, status
, "create session reply");
962 if (be32toh(resp
.status
) != LTTNG_VIEWER_CREATE_SESSION_OK
) {
963 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Error creating viewer session");
964 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
968 status
= lttng_live_query_session_ids(lttng_live_msg_iter
);
969 if (status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
970 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Failed to query live viewer session ids");
972 } else if (status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
980 static enum lttng_live_viewer_status
receive_streams(struct lttng_live_session
*session
,
981 uint32_t stream_count
,
982 bt_self_message_iterator
*self_msg_iter
)
985 struct lttng_live_msg_iter
*lttng_live_msg_iter
= session
->lttng_live_msg_iter
;
986 enum lttng_live_viewer_status status
;
987 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
988 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
990 BT_COMP_LOGI("Getting %" PRIu32
" new streams", stream_count
);
991 for (i
= 0; i
< stream_count
; i
++) {
992 struct lttng_viewer_stream stream
;
993 struct lttng_live_stream_iterator
*live_stream
;
995 uint64_t ctf_trace_id
;
997 status
= lttng_live_recv(viewer_connection
, &stream
, sizeof(stream
));
998 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
999 viewer_handle_recv_status(self_comp
, NULL
, status
, "stream reply");
1002 stream
.path_name
[LTTNG_VIEWER_PATH_MAX
- 1] = '\0';
1003 stream
.channel_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
1004 stream_id
= be64toh(stream
.id
);
1005 ctf_trace_id
= be64toh(stream
.ctf_trace_id
);
1007 if (stream
.metadata_flag
) {
1008 BT_COMP_LOGI(" metadata stream %" PRIu64
" : %s/%s", stream_id
, stream
.path_name
,
1009 stream
.channel_name
);
1010 if (lttng_live_metadata_create_stream(session
, ctf_trace_id
, stream_id
)) {
1011 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Error creating metadata stream");
1012 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1015 session
->lazy_stream_msg_init
= true;
1017 BT_COMP_LOGI(" stream %" PRIu64
" : %s/%s", stream_id
, stream
.path_name
,
1018 stream
.channel_name
);
1020 lttng_live_stream_iterator_create(session
, ctf_trace_id
, stream_id
, self_msg_iter
);
1022 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Error creating stream");
1023 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1028 status
= LTTNG_LIVE_VIEWER_STATUS_OK
;
1034 enum lttng_live_viewer_status
lttng_live_session_attach(struct lttng_live_session
*session
,
1035 bt_self_message_iterator
*self_msg_iter
)
1037 struct lttng_viewer_cmd cmd
;
1038 enum lttng_live_viewer_status status
;
1039 struct lttng_viewer_attach_session_request rq
;
1040 struct lttng_viewer_attach_session_response rp
;
1041 struct lttng_live_msg_iter
*lttng_live_msg_iter
= session
->lttng_live_msg_iter
;
1042 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
1043 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1044 uint64_t session_id
= session
->id
;
1045 uint32_t streams_count
;
1046 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1047 char cmd_buf
[cmd_buf_len
];
1049 BT_COMP_LOGD("Attaching to session: cmd=%s, session-id=%" PRIu64
", seek=%s",
1050 lttng_viewer_command_string(LTTNG_VIEWER_ATTACH_SESSION
), session_id
,
1051 lttng_viewer_seek_string(LTTNG_VIEWER_SEEK_LAST
));
1053 cmd
.cmd
= htobe32(LTTNG_VIEWER_ATTACH_SESSION
);
1054 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1055 cmd
.cmd_version
= htobe32(0);
1057 memset(&rq
, 0, sizeof(rq
));
1058 rq
.session_id
= htobe64(session_id
);
1059 // TODO: add cmd line parameter to select seek beginning
1060 // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING);
1061 rq
.seek
= htobe32(LTTNG_VIEWER_SEEK_LAST
);
1064 * Merge the cmd and connection request to prevent a write-write
1065 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1066 * second write to be performed quickly in presence of Nagle's algorithm.
1068 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1069 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1070 status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1071 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1072 viewer_handle_send_status(self_comp
, NULL
, status
, "attach session command");
1076 status
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1077 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1078 viewer_handle_recv_status(self_comp
, NULL
, status
, "attach session reply");
1082 streams_count
= be32toh(rp
.streams_count
);
1083 switch (be32toh(rp
.status
)) {
1084 case LTTNG_VIEWER_ATTACH_OK
:
1086 case LTTNG_VIEWER_ATTACH_UNK
:
1087 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Session id %" PRIu64
" is unknown", session_id
);
1088 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1090 case LTTNG_VIEWER_ATTACH_ALREADY
:
1091 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "There is already a viewer attached to this session");
1092 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1094 case LTTNG_VIEWER_ATTACH_NOT_LIVE
:
1095 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Not a live session");
1096 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1098 case LTTNG_VIEWER_ATTACH_SEEK_ERR
:
1099 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Wrong seek parameter");
1100 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1103 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Unknown attach return code %u", be32toh(rp
.status
));
1104 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1108 /* We receive the initial list of streams. */
1109 status
= receive_streams(session
, streams_count
, self_msg_iter
);
1111 case LTTNG_LIVE_VIEWER_STATUS_OK
:
1113 case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
:
1115 case LTTNG_LIVE_VIEWER_STATUS_ERROR
:
1116 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Error receiving streams");
1122 session
->attached
= true;
1123 session
->new_streams_needed
= false;
1129 enum lttng_live_viewer_status
lttng_live_session_detach(struct lttng_live_session
*session
)
1131 struct lttng_viewer_cmd cmd
;
1132 enum lttng_live_viewer_status status
;
1133 struct lttng_viewer_detach_session_request rq
;
1134 struct lttng_viewer_detach_session_response rp
;
1135 struct lttng_live_msg_iter
*lttng_live_msg_iter
= session
->lttng_live_msg_iter
;
1136 bt_self_component
*self_comp
= session
->self_comp
;
1137 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
1138 uint64_t session_id
= session
->id
;
1139 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1140 char cmd_buf
[cmd_buf_len
];
1143 * The session might already be detached and the viewer socket might
1144 * already been closed. This happens when calling this function when
1145 * tearing down the graph after an error.
1147 if (!session
->attached
|| viewer_connection
->control_sock
== BT_INVALID_SOCKET
) {
1148 return LTTNG_LIVE_VIEWER_STATUS_OK
;
1151 BT_COMP_LOGD("Detaching from session: cmd=%s, session-id=%" PRIu64
,
1152 lttng_viewer_command_string(LTTNG_VIEWER_DETACH_SESSION
), session_id
);
1154 cmd
.cmd
= htobe32(LTTNG_VIEWER_DETACH_SESSION
);
1155 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1156 cmd
.cmd_version
= htobe32(0);
1158 memset(&rq
, 0, sizeof(rq
));
1159 rq
.session_id
= htobe64(session_id
);
1162 * Merge the cmd and connection request to prevent a write-write
1163 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1164 * second write to be performed quickly in presence of Nagle's algorithm.
1166 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1167 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1168 status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1169 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1170 viewer_handle_send_status(self_comp
, NULL
, status
, "detach session command");
1174 status
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1175 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1176 viewer_handle_recv_status(self_comp
, NULL
, status
, "detach session reply");
1180 switch (be32toh(rp
.status
)) {
1181 case LTTNG_VIEWER_DETACH_SESSION_OK
:
1183 case LTTNG_VIEWER_DETACH_SESSION_UNK
:
1184 BT_COMP_LOGW("Session id %" PRIu64
" is unknown", session_id
);
1185 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1187 case LTTNG_VIEWER_DETACH_SESSION_ERR
:
1188 BT_COMP_LOGW("Error detaching session id %" PRIu64
"", session_id
);
1189 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1192 BT_COMP_LOGE("Unknown detach return code %u", be32toh(rp
.status
));
1193 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1197 session
->attached
= false;
1199 status
= LTTNG_LIVE_VIEWER_STATUS_OK
;
1205 enum lttng_live_get_one_metadata_status
1206 lttng_live_get_one_metadata_packet(struct lttng_live_trace
*trace
, FILE *fp
, size_t *reply_len
)
1209 enum lttng_live_get_one_metadata_status status
;
1210 enum lttng_live_viewer_status viewer_status
;
1211 struct lttng_viewer_cmd cmd
;
1212 struct lttng_viewer_get_metadata rq
;
1213 struct lttng_viewer_metadata_packet rp
;
1216 struct lttng_live_session
*session
= trace
->session
;
1217 struct lttng_live_msg_iter
*lttng_live_msg_iter
= session
->lttng_live_msg_iter
;
1218 struct lttng_live_metadata
*metadata
= trace
->metadata
;
1219 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
1220 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1221 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1222 char cmd_buf
[cmd_buf_len
];
1224 BT_COMP_LOGD("Requesting new metadata for trace:"
1225 "cmd=%s, trace-id=%" PRIu64
", metadata-stream-id=%" PRIu64
,
1226 lttng_viewer_command_string(LTTNG_VIEWER_GET_METADATA
), trace
->id
,
1227 metadata
->stream_id
);
1229 rq
.stream_id
= htobe64(metadata
->stream_id
);
1230 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_METADATA
);
1231 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1232 cmd
.cmd_version
= htobe32(0);
1235 * Merge the cmd and connection request to prevent a write-write
1236 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1237 * second write to be performed quickly in presence of Nagle's algorithm.
1239 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1240 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1241 viewer_status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1242 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1243 viewer_handle_send_status(self_comp
, NULL
, viewer_status
, "get metadata command");
1244 status
= (enum lttng_live_get_one_metadata_status
) viewer_status
;
1248 viewer_status
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1249 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1250 viewer_handle_recv_status(self_comp
, NULL
, viewer_status
, "get metadata reply");
1251 status
= (enum lttng_live_get_one_metadata_status
) viewer_status
;
1255 switch (be32toh(rp
.status
)) {
1256 case LTTNG_VIEWER_METADATA_OK
:
1257 BT_COMP_LOGD("Received get_metadata response: ok");
1259 case LTTNG_VIEWER_NO_NEW_METADATA
:
1260 BT_COMP_LOGD("Received get_metadata response: no new");
1261 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_END
;
1263 case LTTNG_VIEWER_METADATA_ERR
:
1265 * The Relayd cannot find this stream id. Maybe its
1266 * gone already. This can happen in short lived UST app
1267 * in a per-pid session.
1269 BT_COMP_LOGD("Received get_metadata response: error");
1270 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_CLOSED
;
1273 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Received get_metadata response: unknown");
1274 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR
;
1278 len
= be64toh(rp
.len
);
1281 * We received a `LTTNG_VIEWER_METADATA_OK` with a packet
1282 * length of 0. This means we must try again. This scenario
1283 * arises when a clear command is performed on an lttng session.
1286 "Expecting a metadata packet of size 0. Retry to get a packet from the relay.");
1287 goto empty_metadata_packet_retry
;
1290 BT_COMP_LOGD("Writing %" PRIu64
" bytes to metadata", len
);
1292 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Erroneous response length");
1293 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR
;
1297 data
= g_new0(gchar
, len
);
1299 BT_COMP_LOGE_APPEND_CAUSE_ERRNO(self_comp
, "Failed to allocate data buffer", ".");
1300 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR
;
1304 viewer_status
= lttng_live_recv(viewer_connection
, data
, len
);
1305 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1306 viewer_handle_recv_status(self_comp
, NULL
, viewer_status
, "get metadata packet");
1307 status
= (enum lttng_live_get_one_metadata_status
) viewer_status
;
1312 * Write the metadata to the file handle.
1314 writelen
= fwrite(data
, sizeof(uint8_t), len
, fp
);
1315 if (writelen
!= len
) {
1316 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Writing in the metadata file stream");
1317 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR
;
1321 empty_metadata_packet_retry
:
1323 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_OK
;
1331 * Assign the fields from a lttng_viewer_index to a packet_index.
1333 static void lttng_index_to_packet_index(struct lttng_viewer_index
*lindex
,
1334 struct packet_index
*pindex
)
1339 pindex
->offset
= be64toh(lindex
->offset
);
1340 pindex
->packet_size
= be64toh(lindex
->packet_size
);
1341 pindex
->content_size
= be64toh(lindex
->content_size
);
1342 pindex
->ts_cycles
.timestamp_begin
= be64toh(lindex
->timestamp_begin
);
1343 pindex
->ts_cycles
.timestamp_end
= be64toh(lindex
->timestamp_end
);
1344 pindex
->events_discarded
= be64toh(lindex
->events_discarded
);
1347 static void lttng_live_need_new_streams(struct lttng_live_msg_iter
*lttng_live_msg_iter
)
1349 uint64_t session_idx
;
1350 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
1352 for (session_idx
= 0; session_idx
< lttng_live_msg_iter
->sessions
->len
; session_idx
++) {
1353 struct lttng_live_session
*session
=
1354 (lttng_live_session
*) g_ptr_array_index(lttng_live_msg_iter
->sessions
, session_idx
);
1355 BT_COMP_LOGD("Marking session as needing new streams: "
1356 "session-id=%" PRIu64
,
1358 session
->new_streams_needed
= true;
1362 enum lttng_live_iterator_status
1363 lttng_live_get_next_index(struct lttng_live_msg_iter
*lttng_live_msg_iter
,
1364 struct lttng_live_stream_iterator
*stream
, struct packet_index
*index
)
1366 struct lttng_viewer_cmd cmd
;
1367 struct lttng_viewer_get_next_index rq
;
1368 enum lttng_live_viewer_status viewer_status
;
1369 struct lttng_viewer_index rp
;
1370 enum lttng_live_iterator_status status
;
1371 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
1372 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1373 struct lttng_live_trace
*trace
= stream
->trace
;
1374 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1375 char cmd_buf
[cmd_buf_len
];
1376 uint32_t flags
, rp_status
;
1378 BT_COMP_LOGD("Requesting next index for stream: cmd=%s, "
1379 "viewer-stream-id=%" PRIu64
,
1380 lttng_viewer_command_string(LTTNG_VIEWER_GET_NEXT_INDEX
),
1381 stream
->viewer_stream_id
);
1382 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_NEXT_INDEX
);
1383 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1384 cmd
.cmd_version
= htobe32(0);
1386 memset(&rq
, 0, sizeof(rq
));
1387 rq
.stream_id
= htobe64(stream
->viewer_stream_id
);
1390 * Merge the cmd and connection request to prevent a write-write
1391 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1392 * second write to be performed quickly in presence of Nagle's algorithm.
1394 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1395 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1397 viewer_status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1398 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1399 viewer_handle_send_status(self_comp
, NULL
, viewer_status
, "get next index command");
1403 viewer_status
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1404 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1405 viewer_handle_recv_status(self_comp
, NULL
, viewer_status
, "get next index reply");
1409 flags
= be32toh(rp
.flags
);
1410 rp_status
= be32toh(rp
.status
);
1412 BT_COMP_LOGD("Received response from relay daemon: cmd=%s, response=%s",
1413 lttng_viewer_command_string(LTTNG_VIEWER_GET_NEXT_INDEX
),
1414 lttng_viewer_next_index_return_code_string(rp_status
));
1415 switch (rp_status
) {
1416 case LTTNG_VIEWER_INDEX_INACTIVE
:
1418 uint64_t ctf_stream_class_id
;
1420 memset(index
, 0, sizeof(struct packet_index
));
1421 index
->ts_cycles
.timestamp_end
= be64toh(rp
.timestamp_end
);
1422 stream
->current_inactivity_ts
= index
->ts_cycles
.timestamp_end
;
1423 ctf_stream_class_id
= be64toh(rp
.stream_id
);
1424 if (stream
->ctf_stream_class_id
.is_set
) {
1425 BT_ASSERT(stream
->ctf_stream_class_id
.value
== ctf_stream_class_id
);
1427 stream
->ctf_stream_class_id
.value
= ctf_stream_class_id
;
1428 stream
->ctf_stream_class_id
.is_set
= true;
1430 lttng_live_stream_iterator_set_state(stream
, LTTNG_LIVE_STREAM_QUIESCENT
);
1431 status
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
1434 case LTTNG_VIEWER_INDEX_OK
:
1436 uint64_t ctf_stream_class_id
;
1438 lttng_index_to_packet_index(&rp
, index
);
1439 ctf_stream_class_id
= be64toh(rp
.stream_id
);
1440 if (stream
->ctf_stream_class_id
.is_set
) {
1441 BT_ASSERT(stream
->ctf_stream_class_id
.value
== ctf_stream_class_id
);
1443 stream
->ctf_stream_class_id
.value
= ctf_stream_class_id
;
1444 stream
->ctf_stream_class_id
.is_set
= true;
1447 lttng_live_stream_iterator_set_state(stream
, LTTNG_LIVE_STREAM_ACTIVE_DATA
);
1449 if (flags
& LTTNG_VIEWER_FLAG_NEW_METADATA
) {
1450 BT_COMP_LOGD("Marking trace as needing new metadata: "
1451 "response=%s, response-flag=NEW_METADATA, trace-id=%" PRIu64
,
1452 lttng_viewer_next_index_return_code_string(rp_status
), trace
->id
);
1453 trace
->metadata_stream_state
= LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED
;
1455 if (flags
& LTTNG_VIEWER_FLAG_NEW_STREAM
) {
1456 BT_COMP_LOGD("Marking all sessions as possibly needing new streams: "
1457 "response=%s, response-flag=NEW_STREAM",
1458 lttng_viewer_next_index_return_code_string(rp_status
));
1459 lttng_live_need_new_streams(lttng_live_msg_iter
);
1461 status
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
1464 case LTTNG_VIEWER_INDEX_RETRY
:
1465 memset(index
, 0, sizeof(struct packet_index
));
1466 lttng_live_stream_iterator_set_state(stream
, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
);
1467 status
= LTTNG_LIVE_ITERATOR_STATUS_AGAIN
;
1469 case LTTNG_VIEWER_INDEX_HUP
:
1470 memset(index
, 0, sizeof(struct packet_index
));
1471 index
->offset
= EOF
;
1472 lttng_live_stream_iterator_set_state(stream
, LTTNG_LIVE_STREAM_EOF
);
1473 stream
->has_stream_hung_up
= true;
1474 status
= LTTNG_LIVE_ITERATOR_STATUS_END
;
1476 case LTTNG_VIEWER_INDEX_ERR
:
1477 memset(index
, 0, sizeof(struct packet_index
));
1478 lttng_live_stream_iterator_set_state(stream
, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
);
1479 status
= LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
1482 BT_COMP_LOGD("Received get_next_index response: unknown value");
1483 memset(index
, 0, sizeof(struct packet_index
));
1484 lttng_live_stream_iterator_set_state(stream
, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
);
1485 status
= LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
1491 status
= viewer_status_to_live_iterator_status(viewer_status
);
1496 enum ctf_msg_iter_medium_status
1497 lttng_live_get_stream_bytes(struct lttng_live_msg_iter
*lttng_live_msg_iter
,
1498 struct lttng_live_stream_iterator
*stream
, uint8_t *buf
,
1499 uint64_t offset
, uint64_t req_len
, uint64_t *recv_len
)
1501 enum ctf_msg_iter_medium_status status
;
1502 enum lttng_live_viewer_status viewer_status
;
1503 struct lttng_viewer_trace_packet rp
;
1504 struct lttng_viewer_cmd cmd
;
1505 struct lttng_viewer_get_packet rq
;
1506 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
1507 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1508 struct lttng_live_trace
*trace
= stream
->trace
;
1509 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1510 char cmd_buf
[cmd_buf_len
];
1511 uint32_t flags
, rp_status
;
1513 BT_COMP_LOGD("Requesting data from stream: cmd=%s, "
1514 "offset=%" PRIu64
", request-len=%" PRIu64
,
1515 lttng_viewer_command_string(LTTNG_VIEWER_GET_PACKET
), offset
, req_len
);
1517 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_PACKET
);
1518 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1519 cmd
.cmd_version
= htobe32(0);
1521 memset(&rq
, 0, sizeof(rq
));
1522 rq
.stream_id
= htobe64(stream
->viewer_stream_id
);
1523 rq
.offset
= htobe64(offset
);
1524 rq
.len
= htobe32(req_len
);
1527 * Merge the cmd and connection request to prevent a write-write
1528 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1529 * second write to be performed quickly in presence of Nagle's algorithm.
1531 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1532 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1534 viewer_status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1535 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1536 viewer_handle_send_status(self_comp
, NULL
, viewer_status
, "get data packet command");
1537 goto error_convert_status
;
1540 viewer_status
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1541 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1542 viewer_handle_recv_status(self_comp
, NULL
, viewer_status
, "get data packet reply");
1543 goto error_convert_status
;
1546 flags
= be32toh(rp
.flags
);
1547 rp_status
= be32toh(rp
.status
);
1549 BT_COMP_LOGD("Received response from relay daemon: cmd=%s, response=%s",
1550 lttng_viewer_command_string(LTTNG_VIEWER_GET_PACKET
),
1551 lttng_viewer_get_packet_return_code_string(rp_status
));
1552 switch (rp_status
) {
1553 case LTTNG_VIEWER_GET_PACKET_OK
:
1554 req_len
= be32toh(rp
.len
);
1555 BT_COMP_LOGD("Got packet from relay daemon: response=%s, packet-len=%" PRIu64
"",
1556 lttng_viewer_get_packet_return_code_string(rp_status
), req_len
);
1558 case LTTNG_VIEWER_GET_PACKET_RETRY
:
1559 /* Unimplemented by relay daemon */
1560 status
= CTF_MSG_ITER_MEDIUM_STATUS_AGAIN
;
1562 case LTTNG_VIEWER_GET_PACKET_ERR
:
1563 if (flags
& LTTNG_VIEWER_FLAG_NEW_METADATA
) {
1564 BT_COMP_LOGD("Marking trace as needing new metadata: "
1565 "response=%s, response-flag=NEW_METADATA, trace-id=%" PRIu64
,
1566 lttng_viewer_next_index_return_code_string(rp_status
), trace
->id
);
1567 trace
->metadata_stream_state
= LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED
;
1569 if (flags
& LTTNG_VIEWER_FLAG_NEW_STREAM
) {
1570 BT_COMP_LOGD("Marking all sessions as possibly needing new streams: "
1571 "response=%s, response-flag=NEW_STREAM",
1572 lttng_viewer_next_index_return_code_string(rp_status
));
1573 lttng_live_need_new_streams(lttng_live_msg_iter
);
1575 if (flags
& (LTTNG_VIEWER_FLAG_NEW_METADATA
| LTTNG_VIEWER_FLAG_NEW_STREAM
)) {
1576 status
= CTF_MSG_ITER_MEDIUM_STATUS_AGAIN
;
1577 BT_COMP_LOGD("Reply with any one flags set means we should retry: response=%s",
1578 lttng_viewer_get_packet_return_code_string(rp_status
));
1581 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Received get_data_packet response: error");
1582 status
= CTF_MSG_ITER_MEDIUM_STATUS_ERROR
;
1584 case LTTNG_VIEWER_GET_PACKET_EOF
:
1585 status
= CTF_MSG_ITER_MEDIUM_STATUS_EOF
;
1588 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Received get_data_packet response: unknown (%d)",
1590 status
= CTF_MSG_ITER_MEDIUM_STATUS_ERROR
;
1595 status
= CTF_MSG_ITER_MEDIUM_STATUS_ERROR
;
1599 viewer_status
= lttng_live_recv(viewer_connection
, buf
, req_len
);
1600 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1601 viewer_handle_recv_status(self_comp
, NULL
, viewer_status
, "get data packet");
1602 goto error_convert_status
;
1604 *recv_len
= req_len
;
1606 status
= CTF_MSG_ITER_MEDIUM_STATUS_OK
;
1609 error_convert_status
:
1610 status
= viewer_status_to_ctf_msg_iter_medium_status(viewer_status
);
1616 * Request new streams for a session.
1618 enum lttng_live_iterator_status
1619 lttng_live_session_get_new_streams(struct lttng_live_session
*session
,
1620 bt_self_message_iterator
*self_msg_iter
)
1622 enum lttng_live_iterator_status status
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
1623 struct lttng_viewer_cmd cmd
;
1624 struct lttng_viewer_new_streams_request rq
;
1625 struct lttng_viewer_new_streams_response rp
;
1626 struct lttng_live_msg_iter
*lttng_live_msg_iter
= session
->lttng_live_msg_iter
;
1627 enum lttng_live_viewer_status viewer_status
;
1628 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
1629 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1630 uint32_t streams_count
;
1631 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1632 char cmd_buf
[cmd_buf_len
];
1634 if (!session
->new_streams_needed
) {
1635 status
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
1639 BT_COMP_LOGD("Requesting new streams for session: cmd=%s, "
1640 "session-id=%" PRIu64
,
1641 lttng_viewer_command_string(LTTNG_VIEWER_GET_NEW_STREAMS
), session
->id
);
1643 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_NEW_STREAMS
);
1644 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1645 cmd
.cmd_version
= htobe32(0);
1647 memset(&rq
, 0, sizeof(rq
));
1648 rq
.session_id
= htobe64(session
->id
);
1651 * Merge the cmd and connection request to prevent a write-write
1652 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1653 * second write to be performed quickly in presence of Nagle's algorithm.
1655 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1656 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1658 viewer_status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1659 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1660 viewer_handle_send_status(self_comp
, NULL
, viewer_status
, "get new streams command");
1661 status
= viewer_status_to_live_iterator_status(viewer_status
);
1665 viewer_status
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1666 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1667 viewer_handle_recv_status(self_comp
, NULL
, viewer_status
, "get new streams reply");
1668 status
= viewer_status_to_live_iterator_status(viewer_status
);
1672 streams_count
= be32toh(rp
.streams_count
);
1674 switch (be32toh(rp
.status
)) {
1675 case LTTNG_VIEWER_NEW_STREAMS_OK
:
1676 session
->new_streams_needed
= false;
1678 case LTTNG_VIEWER_NEW_STREAMS_NO_NEW
:
1679 session
->new_streams_needed
= false;
1681 case LTTNG_VIEWER_NEW_STREAMS_HUP
:
1682 session
->new_streams_needed
= false;
1683 session
->closed
= true;
1684 status
= LTTNG_LIVE_ITERATOR_STATUS_END
;
1686 case LTTNG_VIEWER_NEW_STREAMS_ERR
:
1687 BT_COMP_LOGD("Received get_new_streams response: error");
1688 status
= LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
1691 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1692 "Received get_new_streams response: Unknown:"
1694 be32toh(rp
.status
));
1695 status
= LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
1699 viewer_status
= receive_streams(session
, streams_count
, self_msg_iter
);
1700 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1701 viewer_handle_recv_status(self_comp
, NULL
, viewer_status
, "new streams");
1702 status
= viewer_status_to_live_iterator_status(viewer_status
);
1706 status
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
1711 enum lttng_live_viewer_status
live_viewer_connection_create(
1712 bt_self_component
*self_comp
, bt_self_component_class
*self_comp_class
,
1713 bt_logging_level log_level
, const char *url
, bool in_query
,
1714 struct lttng_live_msg_iter
*lttng_live_msg_iter
, struct live_viewer_connection
**viewer
)
1716 struct live_viewer_connection
*viewer_connection
;
1717 enum lttng_live_viewer_status status
;
1719 viewer_connection
= g_new0(struct live_viewer_connection
, 1);
1721 if (bt_socket_init(log_level
) != 0) {
1722 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
1723 "Failed to init socket");
1724 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1728 viewer_connection
->log_level
= log_level
;
1730 viewer_connection
->self_comp
= self_comp
;
1731 viewer_connection
->self_comp_class
= self_comp_class
;
1733 viewer_connection
->control_sock
= BT_INVALID_SOCKET
;
1734 viewer_connection
->port
= -1;
1735 viewer_connection
->in_query
= in_query
;
1736 viewer_connection
->lttng_live_msg_iter
= lttng_live_msg_iter
;
1737 viewer_connection
->url
= g_string_new(url
);
1738 if (!viewer_connection
->url
) {
1739 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
1740 "Failed to allocate URL buffer");
1741 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1745 BT_COMP_OR_COMP_CLASS_LOGD(self_comp
, self_comp_class
,
1746 "Establishing connection to url \"%s\"...", url
);
1747 status
= lttng_live_connect_viewer(viewer_connection
);
1749 * Only print error and append cause in case of error. not in case of
1752 if (status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
1753 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
1754 "Failed to establish connection: "
1758 } else if (status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
1761 BT_COMP_OR_COMP_CLASS_LOGD(self_comp
, self_comp_class
,
1762 "Connection to url \"%s\" is established", url
);
1764 *viewer
= viewer_connection
;
1765 status
= LTTNG_LIVE_VIEWER_STATUS_OK
;
1769 if (viewer_connection
) {
1770 live_viewer_connection_destroy(viewer_connection
);
1776 void live_viewer_connection_destroy(struct live_viewer_connection
*viewer_connection
)
1778 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1779 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
1781 if (!viewer_connection
) {
1785 BT_COMP_OR_COMP_CLASS_LOGD(self_comp
, self_comp_class
,
1786 "Closing connection to relay:"
1788 viewer_connection
->url
->str
);
1790 lttng_live_disconnect_viewer(viewer_connection
);
1792 if (viewer_connection
->url
) {
1793 g_string_free(viewer_connection
->url
, true);
1796 if (viewer_connection
->relay_hostname
) {
1797 g_string_free(viewer_connection
->relay_hostname
, true);
1800 if (viewer_connection
->target_hostname
) {
1801 g_string_free(viewer_connection
->target_hostname
, true);
1804 if (viewer_connection
->session_name
) {
1805 g_string_free(viewer_connection
->session_name
, true);
1808 if (viewer_connection
->proto
) {
1809 g_string_free(viewer_connection
->proto
, true);
1812 g_free(viewer_connection
);