2 * SPDX-License-Identifier: MIT
4 * Copyright 2019 Francis Deslauriers <francis.deslauriers@efficios.com>
5 * Copyright 2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
14 #include <sys/types.h>
17 #include <babeltrace2/babeltrace.h>
19 #define BT_COMP_LOG_SELF_COMP (viewer_connection->self_comp)
20 #define BT_LOG_OUTPUT_LEVEL (viewer_connection->log_level)
21 #define BT_LOG_TAG "PLUGIN/SRC.CTF.LTTNG-LIVE/VIEWER"
22 #include "logging/comp-logging.h"
24 #include "common/common.h"
25 #include "compat/compiler.h"
26 #include "compat/endian.h"
27 #include "compat/socket.h"
29 #include "data-stream.hpp"
30 #include "lttng-live.hpp"
31 #include "lttng-viewer-abi.hpp"
32 #include "metadata.hpp"
33 #include "viewer-connection.hpp"
35 #define viewer_handle_send_recv_status(_self_comp, _self_comp_class, _status, _action, _msg_str) \
38 case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED: \
40 case LTTNG_LIVE_VIEWER_STATUS_ERROR: \
41 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(_self_comp, _self_comp_class, \
42 "Error " _action " " _msg_str); \
49 #define viewer_handle_send_status(_self_comp, _self_comp_class, _status, _msg_str) \
50 viewer_handle_send_recv_status(_self_comp, _self_comp_class, _status, "sending", _msg_str)
52 #define viewer_handle_recv_status(_self_comp, _self_comp_class, _status, _msg_str) \
53 viewer_handle_send_recv_status(_self_comp, _self_comp_class, _status, "receiving", _msg_str)
55 #define LTTNG_LIVE_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE_ERRNO(_self_comp, _self_comp_class, _msg, \
58 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(_self_comp, _self_comp_class, _msg ": %s" _fmt, \
59 bt_socket_errormsg(), ##__VA_ARGS__); \
62 static const char *lttng_viewer_command_string(enum lttng_viewer_command cmd
)
65 case LTTNG_VIEWER_CONNECT
:
67 case LTTNG_VIEWER_LIST_SESSIONS
:
68 return "LIST_SESSIONS";
69 case LTTNG_VIEWER_ATTACH_SESSION
:
70 return "ATTACH_SESSION";
71 case LTTNG_VIEWER_GET_NEXT_INDEX
:
72 return "GET_NEXT_INDEX";
73 case LTTNG_VIEWER_GET_PACKET
:
75 case LTTNG_VIEWER_GET_METADATA
:
76 return "GET_METADATA";
77 case LTTNG_VIEWER_GET_NEW_STREAMS
:
78 return "GET_NEW_STREAMS";
79 case LTTNG_VIEWER_CREATE_SESSION
:
80 return "CREATE_SESSION";
81 case LTTNG_VIEWER_DETACH_SESSION
:
82 return "DETACH_SESSION";
89 lttng_viewer_next_index_return_code_string(enum lttng_viewer_next_index_return_code code
)
92 case LTTNG_VIEWER_INDEX_OK
:
94 case LTTNG_VIEWER_INDEX_RETRY
:
96 case LTTNG_VIEWER_INDEX_HUP
:
98 case LTTNG_VIEWER_INDEX_ERR
:
100 case LTTNG_VIEWER_INDEX_INACTIVE
:
101 return "INDEX_INACTIVE";
102 case LTTNG_VIEWER_INDEX_EOF
:
109 static const char *lttng_viewer_next_index_return_code_string(uint32_t code
)
111 return lttng_viewer_next_index_return_code_string((lttng_viewer_next_index_return_code
) code
);
115 lttng_viewer_get_packet_return_code_string(enum lttng_viewer_get_packet_return_code code
)
118 case LTTNG_VIEWER_GET_PACKET_OK
:
119 return "GET_PACKET_OK";
120 case LTTNG_VIEWER_GET_PACKET_RETRY
:
121 return "GET_PACKET_RETRY";
122 case LTTNG_VIEWER_GET_PACKET_ERR
:
123 return "GET_PACKET_ERR";
124 case LTTNG_VIEWER_GET_PACKET_EOF
:
125 return "GET_PACKET_EOF";
131 static const char *lttng_viewer_get_packet_return_code_string(uint32_t code
)
133 return lttng_viewer_get_packet_return_code_string((lttng_viewer_get_packet_return_code
) code
);
136 static const char *lttng_viewer_seek_string(enum lttng_viewer_seek seek
)
139 case LTTNG_VIEWER_SEEK_BEGINNING
:
140 return "SEEK_BEGINNING";
141 case LTTNG_VIEWER_SEEK_LAST
:
148 static inline enum lttng_live_iterator_status
149 viewer_status_to_live_iterator_status(enum lttng_live_viewer_status viewer_status
)
151 switch (viewer_status
) {
152 case LTTNG_LIVE_VIEWER_STATUS_OK
:
153 return LTTNG_LIVE_ITERATOR_STATUS_OK
;
154 case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
:
155 return LTTNG_LIVE_ITERATOR_STATUS_AGAIN
;
156 case LTTNG_LIVE_VIEWER_STATUS_ERROR
:
157 return LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
163 static inline enum ctf_msg_iter_medium_status
164 viewer_status_to_ctf_msg_iter_medium_status(enum lttng_live_viewer_status viewer_status
)
166 switch (viewer_status
) {
167 case LTTNG_LIVE_VIEWER_STATUS_OK
:
168 return CTF_MSG_ITER_MEDIUM_STATUS_OK
;
169 case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
:
170 return CTF_MSG_ITER_MEDIUM_STATUS_AGAIN
;
171 case LTTNG_LIVE_VIEWER_STATUS_ERROR
:
172 return CTF_MSG_ITER_MEDIUM_STATUS_ERROR
;
178 static inline void viewer_connection_close_socket(struct live_viewer_connection
*viewer_connection
)
180 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
181 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
182 int ret
= bt_socket_close(viewer_connection
->control_sock
);
184 BT_COMP_OR_COMP_CLASS_LOGW_ERRNO(self_comp
, self_comp_class
,
185 "Error closing viewer connection socket: ", ".");
188 viewer_connection
->control_sock
= BT_INVALID_SOCKET
;
192 * This function receives a message from the Relay daemon.
193 * If it received the entire message, it returns _OK,
194 * If it's interrupted, it returns _INTERRUPTED,
195 * otherwise, it returns _ERROR.
197 static enum lttng_live_viewer_status
198 lttng_live_recv(struct live_viewer_connection
*viewer_connection
, void *buf
, size_t len
)
201 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
202 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
203 size_t total_received
= 0, to_receive
= len
;
204 struct lttng_live_msg_iter
*lttng_live_msg_iter
= viewer_connection
->lttng_live_msg_iter
;
205 enum lttng_live_viewer_status status
;
206 BT_SOCKET sock
= viewer_connection
->control_sock
;
209 * Receive a message from the Relay.
212 received
= bt_socket_recv(sock
, (char *) buf
+ total_received
, to_receive
, 0);
213 if (received
== BT_SOCKET_ERROR
) {
214 if (bt_socket_interrupted()) {
215 if (lttng_live_graph_is_canceled(lttng_live_msg_iter
)) {
217 * This interruption was due to a
218 * SIGINT and the graph is being torn
221 status
= LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
;
222 lttng_live_msg_iter
->was_interrupted
= true;
226 * A signal was received, but the graph
227 * is not being torn down. Carry on.
233 * For any other types of socket error, close
234 * the socket and return an error.
236 LTTNG_LIVE_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE_ERRNO(
237 self_comp
, self_comp_class
, "Error receiving from Relay", ".");
239 viewer_connection_close_socket(viewer_connection
);
240 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
243 } else if (received
== 0) {
245 * The recv() call returned 0. This means the
246 * connection was orderly shutdown from the other peer.
247 * If that happens when we are trying to receive
248 * a message from it, it means something when wrong.
249 * Close the socket and return an error.
251 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
252 "Remote side has closed connection");
253 viewer_connection_close_socket(viewer_connection
);
254 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
258 BT_ASSERT(received
<= to_receive
);
259 total_received
+= received
;
260 to_receive
-= received
;
262 } while (to_receive
> 0);
264 BT_ASSERT(total_received
== len
);
265 status
= LTTNG_LIVE_VIEWER_STATUS_OK
;
272 * This function sends a message to the Relay daemon.
273 * If it send the message, it returns _OK,
274 * If it's interrupted, it returns _INTERRUPTED,
275 * otherwise, it returns _ERROR.
277 static enum lttng_live_viewer_status
278 lttng_live_send(struct live_viewer_connection
*viewer_connection
, const void *buf
, size_t len
)
280 enum lttng_live_viewer_status status
;
281 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
282 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
283 struct lttng_live_msg_iter
*lttng_live_msg_iter
= viewer_connection
->lttng_live_msg_iter
;
284 BT_SOCKET sock
= viewer_connection
->control_sock
;
285 size_t to_send
= len
;
286 ssize_t total_sent
= 0;
289 ssize_t sent
= bt_socket_send_nosigpipe(sock
, (char *) buf
+ total_sent
, to_send
);
290 if (sent
== BT_SOCKET_ERROR
) {
291 if (bt_socket_interrupted()) {
292 if (lttng_live_graph_is_canceled(lttng_live_msg_iter
)) {
294 * This interruption was a SIGINT and
295 * the graph is being teared down.
297 status
= LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
;
298 lttng_live_msg_iter
->was_interrupted
= true;
302 * A signal was received, but the graph
303 * is not being teared down. Carry on.
309 * For any other types of socket error, close
310 * the socket and return an error.
312 LTTNG_LIVE_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE_ERRNO(
313 self_comp
, self_comp_class
, "Error sending to Relay", ".");
315 viewer_connection_close_socket(viewer_connection
);
316 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
321 BT_ASSERT(sent
<= to_send
);
325 } while (to_send
> 0);
327 BT_ASSERT(total_sent
== len
);
328 status
= LTTNG_LIVE_VIEWER_STATUS_OK
;
334 static int parse_url(struct live_viewer_connection
*viewer_connection
)
336 char error_buf
[256] = {0};
337 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
338 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
339 struct bt_common_lttng_live_url_parts lttng_live_url_parts
= {};
341 const char *path
= viewer_connection
->url
->str
;
347 lttng_live_url_parts
= bt_common_parse_lttng_live_url(path
, error_buf
, sizeof(error_buf
));
348 if (!lttng_live_url_parts
.proto
) {
349 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
350 "Invalid LTTng live URL format: %s", error_buf
);
353 viewer_connection
->proto
= lttng_live_url_parts
.proto
;
354 lttng_live_url_parts
.proto
= NULL
;
356 viewer_connection
->relay_hostname
= lttng_live_url_parts
.hostname
;
357 lttng_live_url_parts
.hostname
= NULL
;
359 if (lttng_live_url_parts
.port
>= 0) {
360 viewer_connection
->port
= lttng_live_url_parts
.port
;
362 viewer_connection
->port
= LTTNG_DEFAULT_NETWORK_VIEWER_PORT
;
365 viewer_connection
->target_hostname
= lttng_live_url_parts
.target_hostname
;
366 lttng_live_url_parts
.target_hostname
= NULL
;
368 if (lttng_live_url_parts
.session_name
) {
369 viewer_connection
->session_name
= lttng_live_url_parts
.session_name
;
370 lttng_live_url_parts
.session_name
= NULL
;
376 bt_common_destroy_lttng_live_url_parts(<tng_live_url_parts
);
380 static enum lttng_live_viewer_status
381 lttng_live_handshake(struct live_viewer_connection
*viewer_connection
)
383 struct lttng_viewer_cmd cmd
;
384 struct lttng_viewer_connect connect
;
385 enum lttng_live_viewer_status status
;
386 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
387 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
388 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(connect
);
389 char cmd_buf
[cmd_buf_len
];
391 BT_COMP_OR_COMP_CLASS_LOGD(
392 self_comp
, self_comp_class
,
393 "Handshaking with the relay daemon: cmd=%s, major-version=%u, minor-version=%u",
394 lttng_viewer_command_string(LTTNG_VIEWER_CONNECT
), LTTNG_LIVE_MAJOR
, LTTNG_LIVE_MINOR
);
396 cmd
.cmd
= htobe32(LTTNG_VIEWER_CONNECT
);
397 cmd
.data_size
= htobe64((uint64_t) sizeof(connect
));
398 cmd
.cmd_version
= htobe32(0);
400 connect
.viewer_session_id
= -1ULL; /* will be set on recv */
401 connect
.major
= htobe32(LTTNG_LIVE_MAJOR
);
402 connect
.minor
= htobe32(LTTNG_LIVE_MINOR
);
403 connect
.type
= htobe32(LTTNG_VIEWER_CLIENT_COMMAND
);
406 * Merge the cmd and connection request to prevent a write-write
407 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
408 * second write to be performed quickly in presence of Nagle's algorithm
410 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
411 memcpy(cmd_buf
+ sizeof(cmd
), &connect
, sizeof(connect
));
413 status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
414 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
415 viewer_handle_send_status(self_comp
, self_comp_class
, status
, "viewer connect command");
419 status
= lttng_live_recv(viewer_connection
, &connect
, sizeof(connect
));
420 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
421 viewer_handle_recv_status(self_comp
, self_comp_class
, status
, "viewer connect reply");
425 BT_COMP_OR_COMP_CLASS_LOGI(self_comp
, self_comp_class
, "Received viewer session ID : %" PRIu64
,
426 (uint64_t) be64toh(connect
.viewer_session_id
));
427 BT_COMP_OR_COMP_CLASS_LOGI(self_comp
, self_comp_class
, "Relayd version : %u.%u",
428 be32toh(connect
.major
), be32toh(connect
.minor
));
430 if (LTTNG_LIVE_MAJOR
!= be32toh(connect
.major
)) {
431 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
432 "Incompatible lttng-relayd protocol");
433 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
436 /* Use the smallest protocol version implemented. */
437 if (LTTNG_LIVE_MINOR
> be32toh(connect
.minor
)) {
438 viewer_connection
->minor
= be32toh(connect
.minor
);
440 viewer_connection
->minor
= LTTNG_LIVE_MINOR
;
442 viewer_connection
->major
= LTTNG_LIVE_MAJOR
;
444 status
= LTTNG_LIVE_VIEWER_STATUS_OK
;
452 static enum lttng_live_viewer_status
453 lttng_live_connect_viewer(struct live_viewer_connection
*viewer_connection
)
455 struct hostent
*host
;
456 struct sockaddr_in server_addr
;
457 enum lttng_live_viewer_status status
;
458 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
459 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
461 if (parse_url(viewer_connection
)) {
462 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
, "Failed to parse URL");
463 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
467 BT_COMP_OR_COMP_CLASS_LOGD(
468 self_comp
, self_comp_class
,
469 "Connecting to hostname : %s, port : %d, "
470 "target hostname : %s, session name : %s, proto : %s",
471 viewer_connection
->relay_hostname
->str
, viewer_connection
->port
,
472 !viewer_connection
->target_hostname
? "<none>" : viewer_connection
->target_hostname
->str
,
473 !viewer_connection
->session_name
? "<none>" : viewer_connection
->session_name
->str
,
474 viewer_connection
->proto
->str
);
476 host
= gethostbyname(viewer_connection
->relay_hostname
->str
);
478 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
479 "Cannot lookup hostname: hostname=\"%s\"",
480 viewer_connection
->relay_hostname
->str
);
481 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
485 if ((viewer_connection
->control_sock
= socket(AF_INET
, SOCK_STREAM
, 0)) == BT_INVALID_SOCKET
) {
486 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
487 "Socket creation failed: %s", bt_socket_errormsg());
488 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
492 server_addr
.sin_family
= AF_INET
;
493 server_addr
.sin_port
= htons(viewer_connection
->port
);
494 server_addr
.sin_addr
= *((struct in_addr
*) host
->h_addr
);
495 memset(&(server_addr
.sin_zero
), 0, 8);
497 if (connect(viewer_connection
->control_sock
, (struct sockaddr
*) &server_addr
,
498 sizeof(struct sockaddr
)) == BT_SOCKET_ERROR
) {
499 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
, "Connection failed: %s",
500 bt_socket_errormsg());
501 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
505 status
= lttng_live_handshake(viewer_connection
);
508 * Only print error and append cause in case of error. not in case of
511 if (status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
512 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
513 "Viewer handshake failed");
515 } else if (status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
522 if (viewer_connection
->control_sock
!= BT_INVALID_SOCKET
) {
523 if (bt_socket_close(viewer_connection
->control_sock
) == BT_SOCKET_ERROR
) {
524 BT_COMP_OR_COMP_CLASS_LOGW(self_comp
, self_comp_class
, "Error closing socket: %s.",
525 bt_socket_errormsg());
528 viewer_connection
->control_sock
= BT_INVALID_SOCKET
;
533 static void lttng_live_disconnect_viewer(struct live_viewer_connection
*viewer_connection
)
535 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
536 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
538 if (viewer_connection
->control_sock
== BT_INVALID_SOCKET
) {
541 if (bt_socket_close(viewer_connection
->control_sock
) == BT_SOCKET_ERROR
) {
542 BT_COMP_OR_COMP_CLASS_LOGW(self_comp
, self_comp_class
, "Error closing socket: %s",
543 bt_socket_errormsg());
544 viewer_connection
->control_sock
= BT_INVALID_SOCKET
;
548 static int list_update_session(bt_value
*results
, const struct lttng_viewer_session
*session
,
549 bool *_found
, struct live_viewer_connection
*viewer_connection
)
551 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
552 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
555 bt_value
*map
= NULL
;
556 bt_value
*hostname
= NULL
;
557 bt_value
*session_name
= NULL
;
558 bt_value
*btval
= NULL
;
561 len
= bt_value_array_get_length(results
);
562 for (i
= 0; i
< len
; i
++) {
563 const char *hostname_str
= NULL
;
564 const char *session_name_str
= NULL
;
566 map
= bt_value_array_borrow_element_by_index(results
, i
);
567 hostname
= bt_value_map_borrow_entry_value(map
, "target-hostname");
569 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
570 "Error borrowing \"target-hostname\" entry.");
574 session_name
= bt_value_map_borrow_entry_value(map
, "session-name");
576 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
577 "Error borrowing \"session-name\" entry.");
581 hostname_str
= bt_value_string_get(hostname
);
582 session_name_str
= bt_value_string_get(session_name
);
584 if (strcmp(session
->hostname
, hostname_str
) == 0 &&
585 strcmp(session
->session_name
, session_name_str
) == 0) {
587 uint32_t streams
= be32toh(session
->streams
);
588 uint32_t clients
= be32toh(session
->clients
);
592 btval
= bt_value_map_borrow_entry_value(map
, "stream-count");
594 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
595 "Error borrowing \"stream-count\" entry.");
599 val
= bt_value_integer_unsigned_get(btval
);
602 bt_value_integer_unsigned_set(btval
, val
);
604 btval
= bt_value_map_borrow_entry_value(map
, "client-count");
606 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
607 "Error borrowing \"client-count\" entry.");
611 val
= bt_value_integer_unsigned_get(btval
);
613 val
= bt_max_t(int64_t, clients
, val
);
614 bt_value_integer_unsigned_set(btval
, val
);
626 static int list_append_session(bt_value
*results
, GString
*base_url
,
627 const struct lttng_viewer_session
*session
,
628 struct live_viewer_connection
*viewer_connection
)
631 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
632 bt_value_map_insert_entry_status insert_status
;
633 bt_value_array_append_element_status append_status
;
634 bt_value
*map
= NULL
;
639 * If the session already exists, add the stream count to it,
640 * and do max of client counts.
642 ret
= list_update_session(results
, session
, &found
, viewer_connection
);
647 map
= bt_value_map_create();
649 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error creating map value.");
654 if (base_url
->len
< 1) {
655 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error: base_url length smaller than 1.");
663 url
= g_string_new(base_url
->str
);
664 g_string_append(url
, "/host/");
665 g_string_append(url
, session
->hostname
);
666 g_string_append_c(url
, '/');
667 g_string_append(url
, session
->session_name
);
669 insert_status
= bt_value_map_insert_string_entry(map
, "url", url
->str
);
670 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
671 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error inserting \"url\" entry.");
677 * key = "target-hostname",
680 insert_status
= bt_value_map_insert_string_entry(map
, "target-hostname", session
->hostname
);
681 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
682 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
683 "Error inserting \"target-hostname\" entry.");
689 * key = "session-name",
692 insert_status
= bt_value_map_insert_string_entry(map
, "session-name", session
->session_name
);
693 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
694 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error inserting \"session-name\" entry.");
704 uint32_t live_timer
= be32toh(session
->live_timer
);
706 insert_status
= bt_value_map_insert_unsigned_integer_entry(map
, "timer-us", live_timer
);
707 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
708 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error inserting \"timer-us\" entry.");
715 * key = "stream-count",
719 uint32_t streams
= be32toh(session
->streams
);
721 insert_status
= bt_value_map_insert_unsigned_integer_entry(map
, "stream-count", streams
);
722 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
723 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
724 "Error inserting \"stream-count\" entry.");
731 * key = "client-count",
735 uint32_t clients
= be32toh(session
->clients
);
737 insert_status
= bt_value_map_insert_unsigned_integer_entry(map
, "client-count", clients
);
738 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
739 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
740 "Error inserting \"client-count\" entry.");
746 append_status
= bt_value_array_append_element(results
, map
);
747 if (append_status
!= BT_VALUE_ARRAY_APPEND_ELEMENT_STATUS_OK
) {
748 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error appending map to results.");
754 g_string_free(url
, true);
756 BT_VALUE_PUT_REF_AND_RESET(map
);
761 * Data structure returned:
772 * key = "target-hostname",
776 * key = "session-name",
784 * key = "stream-count",
788 * key = "client-count",
796 bt_component_class_query_method_status
797 live_viewer_connection_list_sessions(struct live_viewer_connection
*viewer_connection
,
798 const bt_value
**user_result
)
800 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
801 bt_component_class_query_method_status status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK
;
802 bt_value
*result
= NULL
;
803 enum lttng_live_viewer_status viewer_status
;
804 struct lttng_viewer_cmd cmd
;
805 struct lttng_viewer_list_sessions list
;
806 uint32_t i
, sessions_count
;
808 result
= bt_value_array_create();
810 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error creating array");
811 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR
;
815 BT_LOGD("Requesting list of sessions: cmd=%s",
816 lttng_viewer_command_string(LTTNG_VIEWER_LIST_SESSIONS
));
818 cmd
.cmd
= htobe32(LTTNG_VIEWER_LIST_SESSIONS
);
819 cmd
.data_size
= htobe64((uint64_t) 0);
820 cmd
.cmd_version
= htobe32(0);
822 viewer_status
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
823 if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
824 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error sending list sessions command");
825 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
827 } else if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
828 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_AGAIN
;
832 viewer_status
= lttng_live_recv(viewer_connection
, &list
, sizeof(list
));
833 if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
834 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error receiving session list");
835 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
837 } else if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
838 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_AGAIN
;
842 sessions_count
= be32toh(list
.sessions_count
);
843 for (i
= 0; i
< sessions_count
; i
++) {
844 struct lttng_viewer_session lsession
;
846 viewer_status
= lttng_live_recv(viewer_connection
, &lsession
, sizeof(lsession
));
847 if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
848 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error receiving session:");
849 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
851 } else if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
852 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_AGAIN
;
856 lsession
.hostname
[LTTNG_VIEWER_HOST_NAME_MAX
- 1] = '\0';
857 lsession
.session_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
858 if (list_append_session(result
, viewer_connection
->url
, &lsession
, viewer_connection
)) {
859 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error appending session");
860 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
865 *user_result
= result
;
868 BT_VALUE_PUT_REF_AND_RESET(result
);
873 static enum lttng_live_viewer_status
874 lttng_live_query_session_ids(struct lttng_live_msg_iter
*lttng_live_msg_iter
)
876 struct lttng_viewer_cmd cmd
;
877 struct lttng_viewer_list_sessions list
;
878 struct lttng_viewer_session lsession
;
879 uint32_t i
, sessions_count
;
881 enum lttng_live_viewer_status status
;
882 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
883 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
884 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
886 BT_COMP_LOGD("Asking the relay daemon for the list of sessions: cmd=%s",
887 lttng_viewer_command_string(LTTNG_VIEWER_LIST_SESSIONS
));
889 cmd
.cmd
= htobe32(LTTNG_VIEWER_LIST_SESSIONS
);
890 cmd
.data_size
= htobe64((uint64_t) 0);
891 cmd
.cmd_version
= htobe32(0);
893 status
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
894 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
895 viewer_handle_send_status(self_comp
, self_comp_class
, status
, "list sessions command");
899 status
= lttng_live_recv(viewer_connection
, &list
, sizeof(list
));
900 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
901 viewer_handle_recv_status(self_comp
, self_comp_class
, status
, "session list reply");
905 sessions_count
= be32toh(list
.sessions_count
);
906 for (i
= 0; i
< sessions_count
; i
++) {
907 status
= lttng_live_recv(viewer_connection
, &lsession
, sizeof(lsession
));
908 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
909 viewer_handle_recv_status(self_comp
, self_comp_class
, status
, "session reply");
912 lsession
.hostname
[LTTNG_VIEWER_HOST_NAME_MAX
- 1] = '\0';
913 lsession
.session_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
914 session_id
= be64toh(lsession
.id
);
916 BT_COMP_LOGI("Adding session to internal list: "
917 "session-id=%" PRIu64
", hostname=\"%s\", session-name=\"%s\"",
918 session_id
, lsession
.hostname
, lsession
.session_name
);
920 if ((strncmp(lsession
.session_name
, viewer_connection
->session_name
->str
,
921 LTTNG_VIEWER_NAME_MAX
) == 0) &&
922 (strncmp(lsession
.hostname
, viewer_connection
->target_hostname
->str
,
923 LTTNG_VIEWER_HOST_NAME_MAX
) == 0)) {
924 if (lttng_live_add_session(lttng_live_msg_iter
, session_id
, lsession
.hostname
,
925 lsession
.session_name
)) {
926 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Failed to add live session");
927 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
933 status
= LTTNG_LIVE_VIEWER_STATUS_OK
;
939 enum lttng_live_viewer_status
940 lttng_live_create_viewer_session(struct lttng_live_msg_iter
*lttng_live_msg_iter
)
942 struct lttng_viewer_cmd cmd
;
943 struct lttng_viewer_create_session_response resp
;
944 enum lttng_live_viewer_status status
;
945 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
946 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
947 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
949 BT_COMP_OR_COMP_CLASS_LOGD(self_comp
, self_comp_class
, "Creating a viewer session: cmd=%s",
950 lttng_viewer_command_string(LTTNG_VIEWER_CREATE_SESSION
));
952 cmd
.cmd
= htobe32(LTTNG_VIEWER_CREATE_SESSION
);
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
, status
, "create session command");
962 status
= lttng_live_recv(viewer_connection
, &resp
, sizeof(resp
));
963 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
964 viewer_handle_recv_status(self_comp
, self_comp_class
, status
, "create session reply");
968 if (be32toh(resp
.status
) != LTTNG_VIEWER_CREATE_SESSION_OK
) {
969 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Error creating viewer session");
970 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
974 status
= lttng_live_query_session_ids(lttng_live_msg_iter
);
975 if (status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
976 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Failed to query live viewer session ids");
978 } else if (status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
986 static enum lttng_live_viewer_status
receive_streams(struct lttng_live_session
*session
,
987 uint32_t stream_count
,
988 bt_self_message_iterator
*self_msg_iter
)
991 struct lttng_live_msg_iter
*lttng_live_msg_iter
= session
->lttng_live_msg_iter
;
992 enum lttng_live_viewer_status status
;
993 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
994 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
996 BT_COMP_LOGI("Getting %" PRIu32
" new streams", stream_count
);
997 for (i
= 0; i
< stream_count
; i
++) {
998 struct lttng_viewer_stream stream
;
999 struct lttng_live_stream_iterator
*live_stream
;
1001 uint64_t ctf_trace_id
;
1003 status
= lttng_live_recv(viewer_connection
, &stream
, sizeof(stream
));
1004 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1005 viewer_handle_recv_status(self_comp
, NULL
, status
, "stream reply");
1008 stream
.path_name
[LTTNG_VIEWER_PATH_MAX
- 1] = '\0';
1009 stream
.channel_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
1010 stream_id
= be64toh(stream
.id
);
1011 ctf_trace_id
= be64toh(stream
.ctf_trace_id
);
1013 if (stream
.metadata_flag
) {
1014 BT_COMP_LOGI(" metadata stream %" PRIu64
" : %s/%s", stream_id
, stream
.path_name
,
1015 stream
.channel_name
);
1016 if (lttng_live_metadata_create_stream(session
, ctf_trace_id
, stream_id
)) {
1017 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Error creating metadata stream");
1018 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1021 session
->lazy_stream_msg_init
= true;
1023 BT_COMP_LOGI(" stream %" PRIu64
" : %s/%s", stream_id
, stream
.path_name
,
1024 stream
.channel_name
);
1026 lttng_live_stream_iterator_create(session
, ctf_trace_id
, stream_id
, self_msg_iter
);
1028 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Error creating stream");
1029 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1034 status
= LTTNG_LIVE_VIEWER_STATUS_OK
;
1040 enum lttng_live_viewer_status
lttng_live_session_attach(struct lttng_live_session
*session
,
1041 bt_self_message_iterator
*self_msg_iter
)
1043 struct lttng_viewer_cmd cmd
;
1044 enum lttng_live_viewer_status status
;
1045 struct lttng_viewer_attach_session_request rq
;
1046 struct lttng_viewer_attach_session_response rp
;
1047 struct lttng_live_msg_iter
*lttng_live_msg_iter
= session
->lttng_live_msg_iter
;
1048 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
1049 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1050 uint64_t session_id
= session
->id
;
1051 uint32_t streams_count
;
1052 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1053 char cmd_buf
[cmd_buf_len
];
1055 BT_COMP_LOGD("Attaching to session: cmd=%s, session-id=%" PRIu64
", seek=%s",
1056 lttng_viewer_command_string(LTTNG_VIEWER_ATTACH_SESSION
), session_id
,
1057 lttng_viewer_seek_string(LTTNG_VIEWER_SEEK_LAST
));
1059 cmd
.cmd
= htobe32(LTTNG_VIEWER_ATTACH_SESSION
);
1060 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1061 cmd
.cmd_version
= htobe32(0);
1063 memset(&rq
, 0, sizeof(rq
));
1064 rq
.session_id
= htobe64(session_id
);
1065 // TODO: add cmd line parameter to select seek beginning
1066 // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING);
1067 rq
.seek
= htobe32(LTTNG_VIEWER_SEEK_LAST
);
1070 * Merge the cmd and connection request to prevent a write-write
1071 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1072 * second write to be performed quickly in presence of Nagle's algorithm.
1074 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1075 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1076 status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1077 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1078 viewer_handle_send_status(self_comp
, NULL
, status
, "attach session command");
1082 status
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1083 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1084 viewer_handle_recv_status(self_comp
, NULL
, status
, "attach session reply");
1088 streams_count
= be32toh(rp
.streams_count
);
1089 switch (be32toh(rp
.status
)) {
1090 case LTTNG_VIEWER_ATTACH_OK
:
1092 case LTTNG_VIEWER_ATTACH_UNK
:
1093 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Session id %" PRIu64
" is unknown", session_id
);
1094 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1096 case LTTNG_VIEWER_ATTACH_ALREADY
:
1097 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "There is already a viewer attached to this session");
1098 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1100 case LTTNG_VIEWER_ATTACH_NOT_LIVE
:
1101 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Not a live session");
1102 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1104 case LTTNG_VIEWER_ATTACH_SEEK_ERR
:
1105 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Wrong seek parameter");
1106 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1109 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Unknown attach return code %u", be32toh(rp
.status
));
1110 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1114 /* We receive the initial list of streams. */
1115 status
= receive_streams(session
, streams_count
, self_msg_iter
);
1117 case LTTNG_LIVE_VIEWER_STATUS_OK
:
1119 case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
:
1121 case LTTNG_LIVE_VIEWER_STATUS_ERROR
:
1122 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Error receiving streams");
1128 session
->attached
= true;
1129 session
->new_streams_needed
= false;
1135 enum lttng_live_viewer_status
lttng_live_session_detach(struct lttng_live_session
*session
)
1137 struct lttng_viewer_cmd cmd
;
1138 enum lttng_live_viewer_status status
;
1139 struct lttng_viewer_detach_session_request rq
;
1140 struct lttng_viewer_detach_session_response rp
;
1141 struct lttng_live_msg_iter
*lttng_live_msg_iter
= session
->lttng_live_msg_iter
;
1142 bt_self_component
*self_comp
= session
->self_comp
;
1143 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
1144 uint64_t session_id
= session
->id
;
1145 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1146 char cmd_buf
[cmd_buf_len
];
1149 * The session might already be detached and the viewer socket might
1150 * already been closed. This happens when calling this function when
1151 * tearing down the graph after an error.
1153 if (!session
->attached
|| viewer_connection
->control_sock
== BT_INVALID_SOCKET
) {
1154 return LTTNG_LIVE_VIEWER_STATUS_OK
;
1157 BT_COMP_LOGD("Detaching from session: cmd=%s, session-id=%" PRIu64
,
1158 lttng_viewer_command_string(LTTNG_VIEWER_DETACH_SESSION
), session_id
);
1160 cmd
.cmd
= htobe32(LTTNG_VIEWER_DETACH_SESSION
);
1161 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1162 cmd
.cmd_version
= htobe32(0);
1164 memset(&rq
, 0, sizeof(rq
));
1165 rq
.session_id
= htobe64(session_id
);
1168 * Merge the cmd and connection request to prevent a write-write
1169 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1170 * second write to be performed quickly in presence of Nagle's algorithm.
1172 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1173 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1174 status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1175 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1176 viewer_handle_send_status(self_comp
, NULL
, status
, "detach session command");
1180 status
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1181 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1182 viewer_handle_recv_status(self_comp
, NULL
, status
, "detach session reply");
1186 switch (be32toh(rp
.status
)) {
1187 case LTTNG_VIEWER_DETACH_SESSION_OK
:
1189 case LTTNG_VIEWER_DETACH_SESSION_UNK
:
1190 BT_COMP_LOGW("Session id %" PRIu64
" is unknown", session_id
);
1191 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1193 case LTTNG_VIEWER_DETACH_SESSION_ERR
:
1194 BT_COMP_LOGW("Error detaching session id %" PRIu64
"", session_id
);
1195 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1198 BT_COMP_LOGE("Unknown detach return code %u", be32toh(rp
.status
));
1199 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1203 session
->attached
= false;
1205 status
= LTTNG_LIVE_VIEWER_STATUS_OK
;
1211 enum lttng_live_get_one_metadata_status
1212 lttng_live_get_one_metadata_packet(struct lttng_live_trace
*trace
, FILE *fp
, size_t *reply_len
)
1215 enum lttng_live_get_one_metadata_status status
;
1216 enum lttng_live_viewer_status viewer_status
;
1217 struct lttng_viewer_cmd cmd
;
1218 struct lttng_viewer_get_metadata rq
;
1219 struct lttng_viewer_metadata_packet rp
;
1222 struct lttng_live_session
*session
= trace
->session
;
1223 struct lttng_live_msg_iter
*lttng_live_msg_iter
= session
->lttng_live_msg_iter
;
1224 struct lttng_live_metadata
*metadata
= trace
->metadata
;
1225 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
1226 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1227 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1228 char cmd_buf
[cmd_buf_len
];
1230 BT_COMP_LOGD("Requesting new metadata for trace:"
1231 "cmd=%s, trace-id=%" PRIu64
", metadata-stream-id=%" PRIu64
,
1232 lttng_viewer_command_string(LTTNG_VIEWER_GET_METADATA
), trace
->id
,
1233 metadata
->stream_id
);
1235 rq
.stream_id
= htobe64(metadata
->stream_id
);
1236 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_METADATA
);
1237 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1238 cmd
.cmd_version
= htobe32(0);
1241 * Merge the cmd and connection request to prevent a write-write
1242 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1243 * second write to be performed quickly in presence of Nagle's algorithm.
1245 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1246 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1247 viewer_status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1248 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1249 viewer_handle_send_status(self_comp
, NULL
, viewer_status
, "get metadata command");
1250 status
= (enum lttng_live_get_one_metadata_status
) viewer_status
;
1254 viewer_status
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1255 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1256 viewer_handle_recv_status(self_comp
, NULL
, viewer_status
, "get metadata reply");
1257 status
= (enum lttng_live_get_one_metadata_status
) viewer_status
;
1261 switch (be32toh(rp
.status
)) {
1262 case LTTNG_VIEWER_METADATA_OK
:
1263 BT_COMP_LOGD("Received get_metadata response: ok");
1265 case LTTNG_VIEWER_NO_NEW_METADATA
:
1266 BT_COMP_LOGD("Received get_metadata response: no new");
1267 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_END
;
1269 case LTTNG_VIEWER_METADATA_ERR
:
1271 * The Relayd cannot find this stream id. Maybe its
1272 * gone already. This can happen in short lived UST app
1273 * in a per-pid session.
1275 BT_COMP_LOGD("Received get_metadata response: error");
1276 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_CLOSED
;
1279 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Received get_metadata response: unknown");
1280 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR
;
1284 len
= be64toh(rp
.len
);
1287 * We received a `LTTNG_VIEWER_METADATA_OK` with a packet
1288 * length of 0. This means we must try again. This scenario
1289 * arises when a clear command is performed on an lttng session.
1292 "Expecting a metadata packet of size 0. Retry to get a packet from the relay.");
1293 goto empty_metadata_packet_retry
;
1296 BT_COMP_LOGD("Writing %" PRIu64
" bytes to metadata", len
);
1298 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Erroneous response length");
1299 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR
;
1303 data
= g_new0(gchar
, len
);
1305 BT_COMP_LOGE_APPEND_CAUSE_ERRNO(self_comp
, "Failed to allocate data buffer", ".");
1306 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR
;
1310 viewer_status
= lttng_live_recv(viewer_connection
, data
, len
);
1311 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1312 viewer_handle_recv_status(self_comp
, NULL
, viewer_status
, "get metadata packet");
1313 status
= (enum lttng_live_get_one_metadata_status
) viewer_status
;
1318 * Write the metadata to the file handle.
1320 writelen
= fwrite(data
, sizeof(uint8_t), len
, fp
);
1321 if (writelen
!= len
) {
1322 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Writing in the metadata file stream");
1323 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR
;
1327 empty_metadata_packet_retry
:
1329 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_OK
;
1337 * Assign the fields from a lttng_viewer_index to a packet_index.
1339 static void lttng_index_to_packet_index(struct lttng_viewer_index
*lindex
,
1340 struct packet_index
*pindex
)
1345 pindex
->offset
= be64toh(lindex
->offset
);
1346 pindex
->packet_size
= be64toh(lindex
->packet_size
);
1347 pindex
->content_size
= be64toh(lindex
->content_size
);
1348 pindex
->ts_cycles
.timestamp_begin
= be64toh(lindex
->timestamp_begin
);
1349 pindex
->ts_cycles
.timestamp_end
= be64toh(lindex
->timestamp_end
);
1350 pindex
->events_discarded
= be64toh(lindex
->events_discarded
);
1353 static void lttng_live_need_new_streams(struct lttng_live_msg_iter
*lttng_live_msg_iter
)
1355 uint64_t session_idx
;
1356 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
1358 for (session_idx
= 0; session_idx
< lttng_live_msg_iter
->sessions
->len
; session_idx
++) {
1359 struct lttng_live_session
*session
=
1360 (lttng_live_session
*) g_ptr_array_index(lttng_live_msg_iter
->sessions
, session_idx
);
1361 BT_COMP_LOGD("Marking session as needing new streams: "
1362 "session-id=%" PRIu64
,
1364 session
->new_streams_needed
= true;
1368 enum lttng_live_iterator_status
1369 lttng_live_get_next_index(struct lttng_live_msg_iter
*lttng_live_msg_iter
,
1370 struct lttng_live_stream_iterator
*stream
, struct packet_index
*index
)
1372 struct lttng_viewer_cmd cmd
;
1373 struct lttng_viewer_get_next_index rq
;
1374 enum lttng_live_viewer_status viewer_status
;
1375 struct lttng_viewer_index rp
;
1376 enum lttng_live_iterator_status status
;
1377 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
1378 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1379 struct lttng_live_trace
*trace
= stream
->trace
;
1380 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1381 char cmd_buf
[cmd_buf_len
];
1382 uint32_t flags
, rp_status
;
1384 BT_COMP_LOGD("Requesting next index for stream: cmd=%s, "
1385 "viewer-stream-id=%" PRIu64
,
1386 lttng_viewer_command_string(LTTNG_VIEWER_GET_NEXT_INDEX
),
1387 stream
->viewer_stream_id
);
1388 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_NEXT_INDEX
);
1389 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1390 cmd
.cmd_version
= htobe32(0);
1392 memset(&rq
, 0, sizeof(rq
));
1393 rq
.stream_id
= htobe64(stream
->viewer_stream_id
);
1396 * Merge the cmd and connection request to prevent a write-write
1397 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1398 * second write to be performed quickly in presence of Nagle's algorithm.
1400 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1401 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1403 viewer_status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1404 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1405 viewer_handle_send_status(self_comp
, NULL
, viewer_status
, "get next index command");
1409 viewer_status
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1410 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1411 viewer_handle_recv_status(self_comp
, NULL
, viewer_status
, "get next index reply");
1415 flags
= be32toh(rp
.flags
);
1416 rp_status
= be32toh(rp
.status
);
1418 BT_COMP_LOGD("Received response from relay daemon: cmd=%s, response=%s",
1419 lttng_viewer_command_string(LTTNG_VIEWER_GET_NEXT_INDEX
),
1420 lttng_viewer_next_index_return_code_string(rp_status
));
1421 switch (rp_status
) {
1422 case LTTNG_VIEWER_INDEX_INACTIVE
:
1424 uint64_t ctf_stream_class_id
;
1426 memset(index
, 0, sizeof(struct packet_index
));
1427 index
->ts_cycles
.timestamp_end
= be64toh(rp
.timestamp_end
);
1428 stream
->current_inactivity_ts
= index
->ts_cycles
.timestamp_end
;
1429 ctf_stream_class_id
= be64toh(rp
.stream_id
);
1430 if (stream
->ctf_stream_class_id
.is_set
) {
1431 BT_ASSERT(stream
->ctf_stream_class_id
.value
== ctf_stream_class_id
);
1433 stream
->ctf_stream_class_id
.value
= ctf_stream_class_id
;
1434 stream
->ctf_stream_class_id
.is_set
= true;
1436 lttng_live_stream_iterator_set_state(stream
, LTTNG_LIVE_STREAM_QUIESCENT
);
1437 status
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
1440 case LTTNG_VIEWER_INDEX_OK
:
1442 uint64_t ctf_stream_class_id
;
1444 lttng_index_to_packet_index(&rp
, index
);
1445 ctf_stream_class_id
= be64toh(rp
.stream_id
);
1446 if (stream
->ctf_stream_class_id
.is_set
) {
1447 BT_ASSERT(stream
->ctf_stream_class_id
.value
== ctf_stream_class_id
);
1449 stream
->ctf_stream_class_id
.value
= ctf_stream_class_id
;
1450 stream
->ctf_stream_class_id
.is_set
= true;
1453 lttng_live_stream_iterator_set_state(stream
, LTTNG_LIVE_STREAM_ACTIVE_DATA
);
1455 if (flags
& LTTNG_VIEWER_FLAG_NEW_METADATA
) {
1456 BT_COMP_LOGD("Marking trace as needing new metadata: "
1457 "response=%s, response-flag=NEW_METADATA, trace-id=%" PRIu64
,
1458 lttng_viewer_next_index_return_code_string(rp_status
), trace
->id
);
1459 trace
->metadata_stream_state
= LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED
;
1461 if (flags
& LTTNG_VIEWER_FLAG_NEW_STREAM
) {
1462 BT_COMP_LOGD("Marking all sessions as possibly needing new streams: "
1463 "response=%s, response-flag=NEW_STREAM",
1464 lttng_viewer_next_index_return_code_string(rp_status
));
1465 lttng_live_need_new_streams(lttng_live_msg_iter
);
1467 status
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
1470 case LTTNG_VIEWER_INDEX_RETRY
:
1471 memset(index
, 0, sizeof(struct packet_index
));
1472 lttng_live_stream_iterator_set_state(stream
, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
);
1473 status
= LTTNG_LIVE_ITERATOR_STATUS_AGAIN
;
1475 case LTTNG_VIEWER_INDEX_HUP
:
1476 memset(index
, 0, sizeof(struct packet_index
));
1477 index
->offset
= EOF
;
1478 lttng_live_stream_iterator_set_state(stream
, LTTNG_LIVE_STREAM_EOF
);
1479 stream
->has_stream_hung_up
= true;
1480 status
= LTTNG_LIVE_ITERATOR_STATUS_END
;
1482 case LTTNG_VIEWER_INDEX_ERR
:
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
;
1488 BT_COMP_LOGD("Received get_next_index response: unknown value");
1489 memset(index
, 0, sizeof(struct packet_index
));
1490 lttng_live_stream_iterator_set_state(stream
, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
);
1491 status
= LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
1497 status
= viewer_status_to_live_iterator_status(viewer_status
);
1502 enum ctf_msg_iter_medium_status
1503 lttng_live_get_stream_bytes(struct lttng_live_msg_iter
*lttng_live_msg_iter
,
1504 struct lttng_live_stream_iterator
*stream
, uint8_t *buf
,
1505 uint64_t offset
, uint64_t req_len
, uint64_t *recv_len
)
1507 enum ctf_msg_iter_medium_status status
;
1508 enum lttng_live_viewer_status viewer_status
;
1509 struct lttng_viewer_trace_packet rp
;
1510 struct lttng_viewer_cmd cmd
;
1511 struct lttng_viewer_get_packet rq
;
1512 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
1513 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1514 struct lttng_live_trace
*trace
= stream
->trace
;
1515 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1516 char cmd_buf
[cmd_buf_len
];
1517 uint32_t flags
, rp_status
;
1519 BT_COMP_LOGD("Requesting data from stream: cmd=%s, "
1520 "offset=%" PRIu64
", request-len=%" PRIu64
,
1521 lttng_viewer_command_string(LTTNG_VIEWER_GET_PACKET
), offset
, req_len
);
1523 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_PACKET
);
1524 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1525 cmd
.cmd_version
= htobe32(0);
1527 memset(&rq
, 0, sizeof(rq
));
1528 rq
.stream_id
= htobe64(stream
->viewer_stream_id
);
1529 rq
.offset
= htobe64(offset
);
1530 rq
.len
= htobe32(req_len
);
1533 * Merge the cmd and connection request to prevent a write-write
1534 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1535 * second write to be performed quickly in presence of Nagle's algorithm.
1537 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1538 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1540 viewer_status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1541 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1542 viewer_handle_send_status(self_comp
, NULL
, viewer_status
, "get data packet command");
1543 goto error_convert_status
;
1546 viewer_status
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1547 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1548 viewer_handle_recv_status(self_comp
, NULL
, viewer_status
, "get data packet reply");
1549 goto error_convert_status
;
1552 flags
= be32toh(rp
.flags
);
1553 rp_status
= be32toh(rp
.status
);
1555 BT_COMP_LOGD("Received response from relay daemon: cmd=%s, response=%s",
1556 lttng_viewer_command_string(LTTNG_VIEWER_GET_PACKET
),
1557 lttng_viewer_get_packet_return_code_string(rp_status
));
1558 switch (rp_status
) {
1559 case LTTNG_VIEWER_GET_PACKET_OK
:
1560 req_len
= be32toh(rp
.len
);
1561 BT_COMP_LOGD("Got packet from relay daemon: response=%s, packet-len=%" PRIu64
"",
1562 lttng_viewer_get_packet_return_code_string(rp_status
), req_len
);
1564 case LTTNG_VIEWER_GET_PACKET_RETRY
:
1565 /* Unimplemented by relay daemon */
1566 status
= CTF_MSG_ITER_MEDIUM_STATUS_AGAIN
;
1568 case LTTNG_VIEWER_GET_PACKET_ERR
:
1569 if (flags
& LTTNG_VIEWER_FLAG_NEW_METADATA
) {
1570 BT_COMP_LOGD("Marking trace as needing new metadata: "
1571 "response=%s, response-flag=NEW_METADATA, trace-id=%" PRIu64
,
1572 lttng_viewer_next_index_return_code_string(rp_status
), trace
->id
);
1573 trace
->metadata_stream_state
= LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED
;
1575 if (flags
& LTTNG_VIEWER_FLAG_NEW_STREAM
) {
1576 BT_COMP_LOGD("Marking all sessions as possibly needing new streams: "
1577 "response=%s, response-flag=NEW_STREAM",
1578 lttng_viewer_next_index_return_code_string(rp_status
));
1579 lttng_live_need_new_streams(lttng_live_msg_iter
);
1581 if (flags
& (LTTNG_VIEWER_FLAG_NEW_METADATA
| LTTNG_VIEWER_FLAG_NEW_STREAM
)) {
1582 status
= CTF_MSG_ITER_MEDIUM_STATUS_AGAIN
;
1583 BT_COMP_LOGD("Reply with any one flags set means we should retry: response=%s",
1584 lttng_viewer_get_packet_return_code_string(rp_status
));
1587 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Received get_data_packet response: error");
1588 status
= CTF_MSG_ITER_MEDIUM_STATUS_ERROR
;
1590 case LTTNG_VIEWER_GET_PACKET_EOF
:
1591 status
= CTF_MSG_ITER_MEDIUM_STATUS_EOF
;
1594 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Received get_data_packet response: unknown (%d)",
1596 status
= CTF_MSG_ITER_MEDIUM_STATUS_ERROR
;
1601 status
= CTF_MSG_ITER_MEDIUM_STATUS_ERROR
;
1605 viewer_status
= lttng_live_recv(viewer_connection
, buf
, req_len
);
1606 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1607 viewer_handle_recv_status(self_comp
, NULL
, viewer_status
, "get data packet");
1608 goto error_convert_status
;
1610 *recv_len
= req_len
;
1612 status
= CTF_MSG_ITER_MEDIUM_STATUS_OK
;
1615 error_convert_status
:
1616 status
= viewer_status_to_ctf_msg_iter_medium_status(viewer_status
);
1622 * Request new streams for a session.
1624 enum lttng_live_iterator_status
1625 lttng_live_session_get_new_streams(struct lttng_live_session
*session
,
1626 bt_self_message_iterator
*self_msg_iter
)
1628 enum lttng_live_iterator_status status
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
1629 struct lttng_viewer_cmd cmd
;
1630 struct lttng_viewer_new_streams_request rq
;
1631 struct lttng_viewer_new_streams_response rp
;
1632 struct lttng_live_msg_iter
*lttng_live_msg_iter
= session
->lttng_live_msg_iter
;
1633 enum lttng_live_viewer_status viewer_status
;
1634 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
1635 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1636 uint32_t streams_count
;
1637 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1638 char cmd_buf
[cmd_buf_len
];
1640 if (!session
->new_streams_needed
) {
1641 status
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
1645 BT_COMP_LOGD("Requesting new streams for session: cmd=%s, "
1646 "session-id=%" PRIu64
,
1647 lttng_viewer_command_string(LTTNG_VIEWER_GET_NEW_STREAMS
), session
->id
);
1649 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_NEW_STREAMS
);
1650 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1651 cmd
.cmd_version
= htobe32(0);
1653 memset(&rq
, 0, sizeof(rq
));
1654 rq
.session_id
= htobe64(session
->id
);
1657 * Merge the cmd and connection request to prevent a write-write
1658 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1659 * second write to be performed quickly in presence of Nagle's algorithm.
1661 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1662 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1664 viewer_status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1665 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1666 viewer_handle_send_status(self_comp
, NULL
, viewer_status
, "get new streams command");
1667 status
= viewer_status_to_live_iterator_status(viewer_status
);
1671 viewer_status
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1672 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1673 viewer_handle_recv_status(self_comp
, NULL
, viewer_status
, "get new streams reply");
1674 status
= viewer_status_to_live_iterator_status(viewer_status
);
1678 streams_count
= be32toh(rp
.streams_count
);
1680 switch (be32toh(rp
.status
)) {
1681 case LTTNG_VIEWER_NEW_STREAMS_OK
:
1682 session
->new_streams_needed
= false;
1684 case LTTNG_VIEWER_NEW_STREAMS_NO_NEW
:
1685 session
->new_streams_needed
= false;
1687 case LTTNG_VIEWER_NEW_STREAMS_HUP
:
1688 session
->new_streams_needed
= false;
1689 session
->closed
= true;
1690 status
= LTTNG_LIVE_ITERATOR_STATUS_END
;
1692 case LTTNG_VIEWER_NEW_STREAMS_ERR
:
1693 BT_COMP_LOGD("Received get_new_streams response: error");
1694 status
= LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
1697 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1698 "Received get_new_streams response: Unknown:"
1700 be32toh(rp
.status
));
1701 status
= LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
1705 viewer_status
= receive_streams(session
, streams_count
, self_msg_iter
);
1706 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1707 viewer_handle_recv_status(self_comp
, NULL
, viewer_status
, "new streams");
1708 status
= viewer_status_to_live_iterator_status(viewer_status
);
1712 status
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
1717 enum lttng_live_viewer_status
live_viewer_connection_create(
1718 bt_self_component
*self_comp
, bt_self_component_class
*self_comp_class
,
1719 bt_logging_level log_level
, const char *url
, bool in_query
,
1720 struct lttng_live_msg_iter
*lttng_live_msg_iter
, struct live_viewer_connection
**viewer
)
1722 struct live_viewer_connection
*viewer_connection
;
1723 enum lttng_live_viewer_status status
;
1725 viewer_connection
= g_new0(struct live_viewer_connection
, 1);
1727 if (bt_socket_init(log_level
) != 0) {
1728 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
1729 "Failed to init socket");
1730 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1734 viewer_connection
->log_level
= log_level
;
1736 viewer_connection
->self_comp
= self_comp
;
1737 viewer_connection
->self_comp_class
= self_comp_class
;
1739 viewer_connection
->control_sock
= BT_INVALID_SOCKET
;
1740 viewer_connection
->port
= -1;
1741 viewer_connection
->in_query
= in_query
;
1742 viewer_connection
->lttng_live_msg_iter
= lttng_live_msg_iter
;
1743 viewer_connection
->url
= g_string_new(url
);
1744 if (!viewer_connection
->url
) {
1745 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
1746 "Failed to allocate URL buffer");
1747 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1751 BT_COMP_OR_COMP_CLASS_LOGD(self_comp
, self_comp_class
,
1752 "Establishing connection to url \"%s\"...", url
);
1753 status
= lttng_live_connect_viewer(viewer_connection
);
1755 * Only print error and append cause in case of error. not in case of
1758 if (status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
1759 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
1760 "Failed to establish connection: "
1764 } else if (status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
1767 BT_COMP_OR_COMP_CLASS_LOGD(self_comp
, self_comp_class
,
1768 "Connection to url \"%s\" is established", url
);
1770 *viewer
= viewer_connection
;
1771 status
= LTTNG_LIVE_VIEWER_STATUS_OK
;
1775 if (viewer_connection
) {
1776 live_viewer_connection_destroy(viewer_connection
);
1782 void live_viewer_connection_destroy(struct live_viewer_connection
*viewer_connection
)
1784 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1785 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
1787 if (!viewer_connection
) {
1791 BT_COMP_OR_COMP_CLASS_LOGD(self_comp
, self_comp_class
,
1792 "Closing connection to relay:"
1794 viewer_connection
->url
->str
);
1796 lttng_live_disconnect_viewer(viewer_connection
);
1798 if (viewer_connection
->url
) {
1799 g_string_free(viewer_connection
->url
, true);
1802 if (viewer_connection
->relay_hostname
) {
1803 g_string_free(viewer_connection
->relay_hostname
, true);
1806 if (viewer_connection
->target_hostname
) {
1807 g_string_free(viewer_connection
->target_hostname
, true);
1810 if (viewer_connection
->session_name
) {
1811 g_string_free(viewer_connection
->session_name
, true);
1814 if (viewer_connection
->proto
) {
1815 g_string_free(viewer_connection
->proto
, true);
1818 g_free(viewer_connection
);