2 * SPDX-License-Identifier: MIT
4 * Copyright 2019 Francis Deslauriers <francis.deslauriers@efficios.com>
5 * Copyright 2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
8 #define BT_COMP_LOG_SELF_COMP (viewer_connection->self_comp)
9 #define BT_LOG_OUTPUT_LEVEL (viewer_connection->log_level)
10 #define BT_LOG_TAG "PLUGIN/SRC.CTF.LTTNG-LIVE/VIEWER"
11 #include "logging/comp-logging.h"
18 #include <sys/types.h>
23 #include "compat/socket.h"
24 #include "compat/endian.h"
25 #include "compat/compiler.h"
26 #include "common/common.h"
27 #include <babeltrace2/babeltrace.h>
29 #include "lttng-live.hpp"
30 #include "viewer-connection.hpp"
31 #include "lttng-viewer-abi.hpp"
32 #include "data-stream.hpp"
33 #include "metadata.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
= {0};
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",
797 bt_component_class_query_method_status
798 live_viewer_connection_list_sessions(struct live_viewer_connection
*viewer_connection
,
799 const bt_value
**user_result
)
801 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
802 bt_component_class_query_method_status status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK
;
803 bt_value
*result
= NULL
;
804 enum lttng_live_viewer_status viewer_status
;
805 struct lttng_viewer_cmd cmd
;
806 struct lttng_viewer_list_sessions list
;
807 uint32_t i
, sessions_count
;
809 result
= bt_value_array_create();
811 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error creating array");
812 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR
;
816 BT_LOGD("Requesting list of sessions: cmd=%s",
817 lttng_viewer_command_string(LTTNG_VIEWER_LIST_SESSIONS
));
819 cmd
.cmd
= htobe32(LTTNG_VIEWER_LIST_SESSIONS
);
820 cmd
.data_size
= htobe64((uint64_t) 0);
821 cmd
.cmd_version
= htobe32(0);
823 viewer_status
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
824 if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
825 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error sending list sessions command");
826 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
828 } else if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
829 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_AGAIN
;
833 viewer_status
= lttng_live_recv(viewer_connection
, &list
, sizeof(list
));
834 if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
835 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error receiving session list");
836 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
838 } else if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
839 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_AGAIN
;
843 sessions_count
= be32toh(list
.sessions_count
);
844 for (i
= 0; i
< sessions_count
; i
++) {
845 struct lttng_viewer_session lsession
;
847 viewer_status
= lttng_live_recv(viewer_connection
, &lsession
, sizeof(lsession
));
848 if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
849 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error receiving session:");
850 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
852 } else if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
853 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_AGAIN
;
857 lsession
.hostname
[LTTNG_VIEWER_HOST_NAME_MAX
- 1] = '\0';
858 lsession
.session_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
859 if (list_append_session(result
, viewer_connection
->url
, &lsession
, viewer_connection
)) {
860 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error appending session");
861 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
866 *user_result
= result
;
869 BT_VALUE_PUT_REF_AND_RESET(result
);
874 static enum lttng_live_viewer_status
875 lttng_live_query_session_ids(struct lttng_live_msg_iter
*lttng_live_msg_iter
)
877 struct lttng_viewer_cmd cmd
;
878 struct lttng_viewer_list_sessions list
;
879 struct lttng_viewer_session lsession
;
880 uint32_t i
, sessions_count
;
882 enum lttng_live_viewer_status status
;
883 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
884 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
885 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
887 BT_COMP_LOGD("Asking the relay daemon for the list of sessions: cmd=%s",
888 lttng_viewer_command_string(LTTNG_VIEWER_LIST_SESSIONS
));
890 cmd
.cmd
= htobe32(LTTNG_VIEWER_LIST_SESSIONS
);
891 cmd
.data_size
= htobe64((uint64_t) 0);
892 cmd
.cmd_version
= htobe32(0);
894 status
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
895 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
896 viewer_handle_send_status(self_comp
, self_comp_class
, status
, "list sessions command");
900 status
= lttng_live_recv(viewer_connection
, &list
, sizeof(list
));
901 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
902 viewer_handle_recv_status(self_comp
, self_comp_class
, status
, "session list reply");
906 sessions_count
= be32toh(list
.sessions_count
);
907 for (i
= 0; i
< sessions_count
; i
++) {
908 status
= lttng_live_recv(viewer_connection
, &lsession
, sizeof(lsession
));
909 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
910 viewer_handle_recv_status(self_comp
, self_comp_class
, status
, "session reply");
913 lsession
.hostname
[LTTNG_VIEWER_HOST_NAME_MAX
- 1] = '\0';
914 lsession
.session_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
915 session_id
= be64toh(lsession
.id
);
917 BT_COMP_LOGI("Adding session to internal list: "
918 "session-id=%" PRIu64
", hostname=\"%s\", session-name=\"%s\"",
919 session_id
, lsession
.hostname
, lsession
.session_name
);
921 if ((strncmp(lsession
.session_name
, viewer_connection
->session_name
->str
,
922 LTTNG_VIEWER_NAME_MAX
) == 0) &&
923 (strncmp(lsession
.hostname
, viewer_connection
->target_hostname
->str
,
924 LTTNG_VIEWER_HOST_NAME_MAX
) == 0)) {
925 if (lttng_live_add_session(lttng_live_msg_iter
, session_id
, lsession
.hostname
,
926 lsession
.session_name
)) {
927 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Failed to add live session");
928 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
934 status
= LTTNG_LIVE_VIEWER_STATUS_OK
;
941 enum lttng_live_viewer_status
942 lttng_live_create_viewer_session(struct lttng_live_msg_iter
*lttng_live_msg_iter
)
944 struct lttng_viewer_cmd cmd
;
945 struct lttng_viewer_create_session_response resp
;
946 enum lttng_live_viewer_status status
;
947 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
948 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
949 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
951 BT_COMP_OR_COMP_CLASS_LOGD(self_comp
, self_comp_class
, "Creating a viewer session: cmd=%s",
952 lttng_viewer_command_string(LTTNG_VIEWER_CREATE_SESSION
));
954 cmd
.cmd
= htobe32(LTTNG_VIEWER_CREATE_SESSION
);
955 cmd
.data_size
= htobe64((uint64_t) 0);
956 cmd
.cmd_version
= htobe32(0);
958 status
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
959 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
960 viewer_handle_send_status(self_comp
, self_comp_class
, status
, "create session command");
964 status
= lttng_live_recv(viewer_connection
, &resp
, sizeof(resp
));
965 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
966 viewer_handle_recv_status(self_comp
, self_comp_class
, status
, "create session reply");
970 if (be32toh(resp
.status
) != LTTNG_VIEWER_CREATE_SESSION_OK
) {
971 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Error creating viewer session");
972 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
976 status
= lttng_live_query_session_ids(lttng_live_msg_iter
);
977 if (status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
978 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Failed to query live viewer session ids");
980 } else if (status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
988 static enum lttng_live_viewer_status
receive_streams(struct lttng_live_session
*session
,
989 uint32_t stream_count
,
990 bt_self_message_iterator
*self_msg_iter
)
993 struct lttng_live_msg_iter
*lttng_live_msg_iter
= session
->lttng_live_msg_iter
;
994 enum lttng_live_viewer_status status
;
995 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
996 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
998 BT_COMP_LOGI("Getting %" PRIu32
" new streams", stream_count
);
999 for (i
= 0; i
< stream_count
; i
++) {
1000 struct lttng_viewer_stream stream
;
1001 struct lttng_live_stream_iterator
*live_stream
;
1003 uint64_t ctf_trace_id
;
1005 status
= lttng_live_recv(viewer_connection
, &stream
, sizeof(stream
));
1006 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1007 viewer_handle_recv_status(self_comp
, NULL
, status
, "stream reply");
1010 stream
.path_name
[LTTNG_VIEWER_PATH_MAX
- 1] = '\0';
1011 stream
.channel_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
1012 stream_id
= be64toh(stream
.id
);
1013 ctf_trace_id
= be64toh(stream
.ctf_trace_id
);
1015 if (stream
.metadata_flag
) {
1016 BT_COMP_LOGI(" metadata stream %" PRIu64
" : %s/%s", stream_id
, stream
.path_name
,
1017 stream
.channel_name
);
1018 if (lttng_live_metadata_create_stream(session
, ctf_trace_id
, stream_id
,
1019 stream
.path_name
)) {
1020 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Error creating metadata stream");
1021 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1024 session
->lazy_stream_msg_init
= true;
1026 BT_COMP_LOGI(" stream %" PRIu64
" : %s/%s", stream_id
, stream
.path_name
,
1027 stream
.channel_name
);
1029 lttng_live_stream_iterator_create(session
, ctf_trace_id
, stream_id
, self_msg_iter
);
1031 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Error creating stream");
1032 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1037 status
= LTTNG_LIVE_VIEWER_STATUS_OK
;
1044 enum lttng_live_viewer_status
lttng_live_session_attach(struct lttng_live_session
*session
,
1045 bt_self_message_iterator
*self_msg_iter
)
1047 struct lttng_viewer_cmd cmd
;
1048 enum lttng_live_viewer_status status
;
1049 struct lttng_viewer_attach_session_request rq
;
1050 struct lttng_viewer_attach_session_response rp
;
1051 struct lttng_live_msg_iter
*lttng_live_msg_iter
= session
->lttng_live_msg_iter
;
1052 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
1053 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1054 uint64_t session_id
= session
->id
;
1055 uint32_t streams_count
;
1056 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1057 char cmd_buf
[cmd_buf_len
];
1059 BT_COMP_LOGD("Attaching to session: cmd=%s, session-id=%" PRIu64
", seek=%s",
1060 lttng_viewer_command_string(LTTNG_VIEWER_ATTACH_SESSION
), session_id
,
1061 lttng_viewer_seek_string(LTTNG_VIEWER_SEEK_LAST
));
1063 cmd
.cmd
= htobe32(LTTNG_VIEWER_ATTACH_SESSION
);
1064 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1065 cmd
.cmd_version
= htobe32(0);
1067 memset(&rq
, 0, sizeof(rq
));
1068 rq
.session_id
= htobe64(session_id
);
1069 // TODO: add cmd line parameter to select seek beginning
1070 // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING);
1071 rq
.seek
= htobe32(LTTNG_VIEWER_SEEK_LAST
);
1074 * Merge the cmd and connection request to prevent a write-write
1075 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1076 * second write to be performed quickly in presence of Nagle's algorithm.
1078 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1079 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1080 status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1081 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1082 viewer_handle_send_status(self_comp
, NULL
, status
, "attach session command");
1086 status
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1087 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1088 viewer_handle_recv_status(self_comp
, NULL
, status
, "attach session reply");
1092 streams_count
= be32toh(rp
.streams_count
);
1093 switch (be32toh(rp
.status
)) {
1094 case LTTNG_VIEWER_ATTACH_OK
:
1096 case LTTNG_VIEWER_ATTACH_UNK
:
1097 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Session id %" PRIu64
" is unknown", session_id
);
1098 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1100 case LTTNG_VIEWER_ATTACH_ALREADY
:
1101 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "There is already a viewer attached to this session");
1102 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1104 case LTTNG_VIEWER_ATTACH_NOT_LIVE
:
1105 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Not a live session");
1106 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1108 case LTTNG_VIEWER_ATTACH_SEEK_ERR
:
1109 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Wrong seek parameter");
1110 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1113 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Unknown attach return code %u", be32toh(rp
.status
));
1114 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1118 /* We receive the initial list of streams. */
1119 status
= receive_streams(session
, streams_count
, self_msg_iter
);
1121 case LTTNG_LIVE_VIEWER_STATUS_OK
:
1123 case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
:
1125 case LTTNG_LIVE_VIEWER_STATUS_ERROR
:
1126 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Error receiving streams");
1132 session
->attached
= true;
1133 session
->new_streams_needed
= false;
1140 enum lttng_live_viewer_status
lttng_live_session_detach(struct lttng_live_session
*session
)
1142 struct lttng_viewer_cmd cmd
;
1143 enum lttng_live_viewer_status status
;
1144 struct lttng_viewer_detach_session_request rq
;
1145 struct lttng_viewer_detach_session_response rp
;
1146 struct lttng_live_msg_iter
*lttng_live_msg_iter
= session
->lttng_live_msg_iter
;
1147 bt_self_component
*self_comp
= session
->self_comp
;
1148 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
1149 uint64_t session_id
= session
->id
;
1150 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1151 char cmd_buf
[cmd_buf_len
];
1154 * The session might already be detached and the viewer socket might
1155 * already been closed. This happens when calling this function when
1156 * tearing down the graph after an error.
1158 if (!session
->attached
|| viewer_connection
->control_sock
== BT_INVALID_SOCKET
) {
1159 return LTTNG_LIVE_VIEWER_STATUS_OK
;
1162 BT_COMP_LOGD("Detaching from session: cmd=%s, session-id=%" PRIu64
,
1163 lttng_viewer_command_string(LTTNG_VIEWER_DETACH_SESSION
), session_id
);
1165 cmd
.cmd
= htobe32(LTTNG_VIEWER_DETACH_SESSION
);
1166 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1167 cmd
.cmd_version
= htobe32(0);
1169 memset(&rq
, 0, sizeof(rq
));
1170 rq
.session_id
= htobe64(session_id
);
1173 * Merge the cmd and connection request to prevent a write-write
1174 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1175 * second write to be performed quickly in presence of Nagle's algorithm.
1177 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1178 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1179 status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1180 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1181 viewer_handle_send_status(self_comp
, NULL
, status
, "detach session command");
1185 status
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1186 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1187 viewer_handle_recv_status(self_comp
, NULL
, status
, "detach session reply");
1191 switch (be32toh(rp
.status
)) {
1192 case LTTNG_VIEWER_DETACH_SESSION_OK
:
1194 case LTTNG_VIEWER_DETACH_SESSION_UNK
:
1195 BT_COMP_LOGW("Session id %" PRIu64
" is unknown", session_id
);
1196 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1198 case LTTNG_VIEWER_DETACH_SESSION_ERR
:
1199 BT_COMP_LOGW("Error detaching session id %" PRIu64
"", session_id
);
1200 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1203 BT_COMP_LOGE("Unknown detach return code %u", be32toh(rp
.status
));
1204 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1208 session
->attached
= false;
1210 status
= LTTNG_LIVE_VIEWER_STATUS_OK
;
1217 enum lttng_live_get_one_metadata_status
1218 lttng_live_get_one_metadata_packet(struct lttng_live_trace
*trace
, FILE *fp
, size_t *reply_len
)
1221 enum lttng_live_get_one_metadata_status status
;
1222 enum lttng_live_viewer_status viewer_status
;
1223 struct lttng_viewer_cmd cmd
;
1224 struct lttng_viewer_get_metadata rq
;
1225 struct lttng_viewer_metadata_packet rp
;
1228 struct lttng_live_session
*session
= trace
->session
;
1229 struct lttng_live_msg_iter
*lttng_live_msg_iter
= session
->lttng_live_msg_iter
;
1230 struct lttng_live_metadata
*metadata
= trace
->metadata
;
1231 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
1232 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1233 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1234 char cmd_buf
[cmd_buf_len
];
1236 BT_COMP_LOGD("Requesting new metadata for trace:"
1237 "cmd=%s, trace-id=%" PRIu64
", metadata-stream-id=%" PRIu64
,
1238 lttng_viewer_command_string(LTTNG_VIEWER_GET_METADATA
), trace
->id
,
1239 metadata
->stream_id
);
1241 rq
.stream_id
= htobe64(metadata
->stream_id
);
1242 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_METADATA
);
1243 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1244 cmd
.cmd_version
= htobe32(0);
1247 * Merge the cmd and connection request to prevent a write-write
1248 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1249 * second write to be performed quickly in presence of Nagle's algorithm.
1251 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1252 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1253 viewer_status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1254 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1255 viewer_handle_send_status(self_comp
, NULL
, viewer_status
, "get metadata command");
1256 status
= (enum lttng_live_get_one_metadata_status
) viewer_status
;
1260 viewer_status
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1261 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1262 viewer_handle_recv_status(self_comp
, NULL
, viewer_status
, "get metadata reply");
1263 status
= (enum lttng_live_get_one_metadata_status
) viewer_status
;
1267 switch (be32toh(rp
.status
)) {
1268 case LTTNG_VIEWER_METADATA_OK
:
1269 BT_COMP_LOGD("Received get_metadata response: ok");
1271 case LTTNG_VIEWER_NO_NEW_METADATA
:
1272 BT_COMP_LOGD("Received get_metadata response: no new");
1273 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_END
;
1275 case LTTNG_VIEWER_METADATA_ERR
:
1277 * The Relayd cannot find this stream id. Maybe its
1278 * gone already. This can happen in short lived UST app
1279 * in a per-pid session.
1281 BT_COMP_LOGD("Received get_metadata response: error");
1282 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_CLOSED
;
1285 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Received get_metadata response: unknown");
1286 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR
;
1290 len
= be64toh(rp
.len
);
1293 * We received a `LTTNG_VIEWER_METADATA_OK` with a packet
1294 * length of 0. This means we must try again. This scenario
1295 * arises when a clear command is performed on an lttng session.
1298 "Expecting a metadata packet of size 0. Retry to get a packet from the relay.");
1299 goto empty_metadata_packet_retry
;
1302 BT_COMP_LOGD("Writing %" PRIu64
" bytes to metadata", len
);
1304 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Erroneous response length");
1305 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR
;
1309 data
= g_new0(gchar
, len
);
1311 BT_COMP_LOGE_APPEND_CAUSE_ERRNO(self_comp
, "Failed to allocate data buffer", ".");
1312 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR
;
1316 viewer_status
= lttng_live_recv(viewer_connection
, data
, len
);
1317 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1318 viewer_handle_recv_status(self_comp
, NULL
, viewer_status
, "get metadata packet");
1319 status
= (enum lttng_live_get_one_metadata_status
) viewer_status
;
1324 * Write the metadata to the file handle.
1326 writelen
= fwrite(data
, sizeof(uint8_t), len
, fp
);
1327 if (writelen
!= len
) {
1328 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Writing in the metadata file stream");
1329 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR
;
1333 empty_metadata_packet_retry
:
1335 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_OK
;
1343 * Assign the fields from a lttng_viewer_index to a packet_index.
1345 static void lttng_index_to_packet_index(struct lttng_viewer_index
*lindex
,
1346 struct packet_index
*pindex
)
1351 pindex
->offset
= be64toh(lindex
->offset
);
1352 pindex
->packet_size
= be64toh(lindex
->packet_size
);
1353 pindex
->content_size
= be64toh(lindex
->content_size
);
1354 pindex
->ts_cycles
.timestamp_begin
= be64toh(lindex
->timestamp_begin
);
1355 pindex
->ts_cycles
.timestamp_end
= be64toh(lindex
->timestamp_end
);
1356 pindex
->events_discarded
= be64toh(lindex
->events_discarded
);
1359 static void lttng_live_need_new_streams(struct lttng_live_msg_iter
*lttng_live_msg_iter
)
1361 uint64_t session_idx
;
1362 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
1364 for (session_idx
= 0; session_idx
< lttng_live_msg_iter
->sessions
->len
; session_idx
++) {
1365 struct lttng_live_session
*session
=
1366 (lttng_live_session
*) g_ptr_array_index(lttng_live_msg_iter
->sessions
, session_idx
);
1367 BT_COMP_LOGD("Marking session as needing new streams: "
1368 "session-id=%" PRIu64
,
1370 session
->new_streams_needed
= true;
1375 enum lttng_live_iterator_status
1376 lttng_live_get_next_index(struct lttng_live_msg_iter
*lttng_live_msg_iter
,
1377 struct lttng_live_stream_iterator
*stream
, struct packet_index
*index
)
1379 struct lttng_viewer_cmd cmd
;
1380 struct lttng_viewer_get_next_index rq
;
1381 enum lttng_live_viewer_status viewer_status
;
1382 struct lttng_viewer_index rp
;
1383 enum lttng_live_iterator_status status
;
1384 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
1385 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1386 struct lttng_live_trace
*trace
= stream
->trace
;
1387 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1388 char cmd_buf
[cmd_buf_len
];
1389 uint32_t flags
, rp_status
;
1391 BT_COMP_LOGD("Requesting next index for stream: cmd=%s, "
1392 "viewer-stream-id=%" PRIu64
,
1393 lttng_viewer_command_string(LTTNG_VIEWER_GET_NEXT_INDEX
),
1394 stream
->viewer_stream_id
);
1395 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_NEXT_INDEX
);
1396 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1397 cmd
.cmd_version
= htobe32(0);
1399 memset(&rq
, 0, sizeof(rq
));
1400 rq
.stream_id
= htobe64(stream
->viewer_stream_id
);
1403 * Merge the cmd and connection request to prevent a write-write
1404 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1405 * second write to be performed quickly in presence of Nagle's algorithm.
1407 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1408 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1410 viewer_status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1411 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1412 viewer_handle_send_status(self_comp
, NULL
, viewer_status
, "get next index command");
1416 viewer_status
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1417 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1418 viewer_handle_recv_status(self_comp
, NULL
, viewer_status
, "get next index reply");
1422 flags
= be32toh(rp
.flags
);
1423 rp_status
= be32toh(rp
.status
);
1425 BT_COMP_LOGD("Received response from relay daemon: cmd=%s, response=%s",
1426 lttng_viewer_command_string(LTTNG_VIEWER_GET_NEXT_INDEX
),
1427 lttng_viewer_next_index_return_code_string(rp_status
));
1428 switch (rp_status
) {
1429 case LTTNG_VIEWER_INDEX_INACTIVE
:
1431 uint64_t ctf_stream_class_id
;
1433 memset(index
, 0, sizeof(struct packet_index
));
1434 index
->ts_cycles
.timestamp_end
= be64toh(rp
.timestamp_end
);
1435 stream
->current_inactivity_ts
= index
->ts_cycles
.timestamp_end
;
1436 ctf_stream_class_id
= be64toh(rp
.stream_id
);
1437 if (stream
->ctf_stream_class_id
.is_set
) {
1438 BT_ASSERT(stream
->ctf_stream_class_id
.value
== ctf_stream_class_id
);
1440 stream
->ctf_stream_class_id
.value
= ctf_stream_class_id
;
1441 stream
->ctf_stream_class_id
.is_set
= true;
1443 lttng_live_stream_iterator_set_state(stream
, LTTNG_LIVE_STREAM_QUIESCENT
);
1444 status
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
1447 case LTTNG_VIEWER_INDEX_OK
:
1449 uint64_t ctf_stream_class_id
;
1451 lttng_index_to_packet_index(&rp
, index
);
1452 ctf_stream_class_id
= be64toh(rp
.stream_id
);
1453 if (stream
->ctf_stream_class_id
.is_set
) {
1454 BT_ASSERT(stream
->ctf_stream_class_id
.value
== ctf_stream_class_id
);
1456 stream
->ctf_stream_class_id
.value
= ctf_stream_class_id
;
1457 stream
->ctf_stream_class_id
.is_set
= true;
1460 lttng_live_stream_iterator_set_state(stream
, LTTNG_LIVE_STREAM_ACTIVE_DATA
);
1462 if (flags
& LTTNG_VIEWER_FLAG_NEW_METADATA
) {
1463 BT_COMP_LOGD("Marking trace as needing new metadata: "
1464 "response=%s, response-flag=NEW_METADATA, trace-id=%" PRIu64
,
1465 lttng_viewer_next_index_return_code_string(rp_status
), trace
->id
);
1466 trace
->metadata_stream_state
= LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED
;
1468 if (flags
& LTTNG_VIEWER_FLAG_NEW_STREAM
) {
1469 BT_COMP_LOGD("Marking all sessions as possibly needing new streams: "
1470 "response=%s, response-flag=NEW_STREAM",
1471 lttng_viewer_next_index_return_code_string(rp_status
));
1472 lttng_live_need_new_streams(lttng_live_msg_iter
);
1474 status
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
1477 case LTTNG_VIEWER_INDEX_RETRY
:
1478 memset(index
, 0, sizeof(struct packet_index
));
1479 lttng_live_stream_iterator_set_state(stream
, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
);
1480 status
= LTTNG_LIVE_ITERATOR_STATUS_AGAIN
;
1482 case LTTNG_VIEWER_INDEX_HUP
:
1483 memset(index
, 0, sizeof(struct packet_index
));
1484 index
->offset
= EOF
;
1485 lttng_live_stream_iterator_set_state(stream
, LTTNG_LIVE_STREAM_EOF
);
1486 stream
->has_stream_hung_up
= true;
1487 status
= LTTNG_LIVE_ITERATOR_STATUS_END
;
1489 case LTTNG_VIEWER_INDEX_ERR
:
1490 memset(index
, 0, sizeof(struct packet_index
));
1491 lttng_live_stream_iterator_set_state(stream
, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
);
1492 status
= LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
1495 BT_COMP_LOGD("Received get_next_index response: unknown value");
1496 memset(index
, 0, sizeof(struct packet_index
));
1497 lttng_live_stream_iterator_set_state(stream
, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
);
1498 status
= LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
1504 status
= viewer_status_to_live_iterator_status(viewer_status
);
1510 enum ctf_msg_iter_medium_status
1511 lttng_live_get_stream_bytes(struct lttng_live_msg_iter
*lttng_live_msg_iter
,
1512 struct lttng_live_stream_iterator
*stream
, uint8_t *buf
,
1513 uint64_t offset
, uint64_t req_len
, uint64_t *recv_len
)
1515 enum ctf_msg_iter_medium_status status
;
1516 enum lttng_live_viewer_status viewer_status
;
1517 struct lttng_viewer_trace_packet rp
;
1518 struct lttng_viewer_cmd cmd
;
1519 struct lttng_viewer_get_packet rq
;
1520 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
1521 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1522 struct lttng_live_trace
*trace
= stream
->trace
;
1523 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1524 char cmd_buf
[cmd_buf_len
];
1525 uint32_t flags
, rp_status
;
1527 BT_COMP_LOGD("Requesting data from stream: cmd=%s, "
1528 "offset=%" PRIu64
", request-len=%" PRIu64
,
1529 lttng_viewer_command_string(LTTNG_VIEWER_GET_PACKET
), offset
, req_len
);
1531 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_PACKET
);
1532 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1533 cmd
.cmd_version
= htobe32(0);
1535 memset(&rq
, 0, sizeof(rq
));
1536 rq
.stream_id
= htobe64(stream
->viewer_stream_id
);
1537 rq
.offset
= htobe64(offset
);
1538 rq
.len
= htobe32(req_len
);
1541 * Merge the cmd and connection request to prevent a write-write
1542 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1543 * second write to be performed quickly in presence of Nagle's algorithm.
1545 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1546 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1548 viewer_status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1549 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1550 viewer_handle_send_status(self_comp
, NULL
, viewer_status
, "get data packet command");
1551 goto error_convert_status
;
1554 viewer_status
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1555 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1556 viewer_handle_recv_status(self_comp
, NULL
, viewer_status
, "get data packet reply");
1557 goto error_convert_status
;
1560 flags
= be32toh(rp
.flags
);
1561 rp_status
= be32toh(rp
.status
);
1563 BT_COMP_LOGD("Received response from relay daemon: cmd=%s, response=%s",
1564 lttng_viewer_command_string(LTTNG_VIEWER_GET_PACKET
),
1565 lttng_viewer_get_packet_return_code_string(rp_status
));
1566 switch (rp_status
) {
1567 case LTTNG_VIEWER_GET_PACKET_OK
:
1568 req_len
= be32toh(rp
.len
);
1569 BT_COMP_LOGD("Got packet from relay daemon: response=%s, packet-len=%" PRIu64
"",
1570 lttng_viewer_get_packet_return_code_string(rp_status
), req_len
);
1572 case LTTNG_VIEWER_GET_PACKET_RETRY
:
1573 /* Unimplemented by relay daemon */
1574 status
= CTF_MSG_ITER_MEDIUM_STATUS_AGAIN
;
1576 case LTTNG_VIEWER_GET_PACKET_ERR
:
1577 if (flags
& LTTNG_VIEWER_FLAG_NEW_METADATA
) {
1578 BT_COMP_LOGD("Marking trace as needing new metadata: "
1579 "response=%s, response-flag=NEW_METADATA, trace-id=%" PRIu64
,
1580 lttng_viewer_next_index_return_code_string(rp_status
), trace
->id
);
1581 trace
->metadata_stream_state
= LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED
;
1583 if (flags
& LTTNG_VIEWER_FLAG_NEW_STREAM
) {
1584 BT_COMP_LOGD("Marking all sessions as possibly needing new streams: "
1585 "response=%s, response-flag=NEW_STREAM",
1586 lttng_viewer_next_index_return_code_string(rp_status
));
1587 lttng_live_need_new_streams(lttng_live_msg_iter
);
1589 if (flags
& (LTTNG_VIEWER_FLAG_NEW_METADATA
| LTTNG_VIEWER_FLAG_NEW_STREAM
)) {
1590 status
= CTF_MSG_ITER_MEDIUM_STATUS_AGAIN
;
1591 BT_COMP_LOGD("Reply with any one flags set means we should retry: response=%s",
1592 lttng_viewer_get_packet_return_code_string(rp_status
));
1595 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Received get_data_packet response: error");
1596 status
= CTF_MSG_ITER_MEDIUM_STATUS_ERROR
;
1598 case LTTNG_VIEWER_GET_PACKET_EOF
:
1599 status
= CTF_MSG_ITER_MEDIUM_STATUS_EOF
;
1602 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Received get_data_packet response: unknown (%d)",
1604 status
= CTF_MSG_ITER_MEDIUM_STATUS_ERROR
;
1609 status
= CTF_MSG_ITER_MEDIUM_STATUS_ERROR
;
1613 viewer_status
= lttng_live_recv(viewer_connection
, buf
, req_len
);
1614 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1615 viewer_handle_recv_status(self_comp
, NULL
, viewer_status
, "get data packet");
1616 goto error_convert_status
;
1618 *recv_len
= req_len
;
1620 status
= CTF_MSG_ITER_MEDIUM_STATUS_OK
;
1623 error_convert_status
:
1624 status
= viewer_status_to_ctf_msg_iter_medium_status(viewer_status
);
1630 * Request new streams for a session.
1633 enum lttng_live_iterator_status
1634 lttng_live_session_get_new_streams(struct lttng_live_session
*session
,
1635 bt_self_message_iterator
*self_msg_iter
)
1637 enum lttng_live_iterator_status status
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
1638 struct lttng_viewer_cmd cmd
;
1639 struct lttng_viewer_new_streams_request rq
;
1640 struct lttng_viewer_new_streams_response rp
;
1641 struct lttng_live_msg_iter
*lttng_live_msg_iter
= session
->lttng_live_msg_iter
;
1642 enum lttng_live_viewer_status viewer_status
;
1643 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
1644 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1645 uint32_t streams_count
;
1646 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1647 char cmd_buf
[cmd_buf_len
];
1649 if (!session
->new_streams_needed
) {
1650 status
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
1654 BT_COMP_LOGD("Requesting new streams for session: cmd=%s, "
1655 "session-id=%" PRIu64
,
1656 lttng_viewer_command_string(LTTNG_VIEWER_GET_NEW_STREAMS
), session
->id
);
1658 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_NEW_STREAMS
);
1659 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1660 cmd
.cmd_version
= htobe32(0);
1662 memset(&rq
, 0, sizeof(rq
));
1663 rq
.session_id
= htobe64(session
->id
);
1666 * Merge the cmd and connection request to prevent a write-write
1667 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1668 * second write to be performed quickly in presence of Nagle's algorithm.
1670 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1671 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1673 viewer_status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1674 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1675 viewer_handle_send_status(self_comp
, NULL
, viewer_status
, "get new streams command");
1676 status
= viewer_status_to_live_iterator_status(viewer_status
);
1680 viewer_status
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1681 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1682 viewer_handle_recv_status(self_comp
, NULL
, viewer_status
, "get new streams reply");
1683 status
= viewer_status_to_live_iterator_status(viewer_status
);
1687 streams_count
= be32toh(rp
.streams_count
);
1689 switch (be32toh(rp
.status
)) {
1690 case LTTNG_VIEWER_NEW_STREAMS_OK
:
1691 session
->new_streams_needed
= false;
1693 case LTTNG_VIEWER_NEW_STREAMS_NO_NEW
:
1694 session
->new_streams_needed
= false;
1696 case LTTNG_VIEWER_NEW_STREAMS_HUP
:
1697 session
->new_streams_needed
= false;
1698 session
->closed
= true;
1699 status
= LTTNG_LIVE_ITERATOR_STATUS_END
;
1701 case LTTNG_VIEWER_NEW_STREAMS_ERR
:
1702 BT_COMP_LOGD("Received get_new_streams response: error");
1703 status
= LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
1706 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1707 "Received get_new_streams response: Unknown:"
1709 be32toh(rp
.status
));
1710 status
= LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
1714 viewer_status
= receive_streams(session
, streams_count
, self_msg_iter
);
1715 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1716 viewer_handle_recv_status(self_comp
, NULL
, viewer_status
, "new streams");
1717 status
= viewer_status_to_live_iterator_status(viewer_status
);
1721 status
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
1727 enum lttng_live_viewer_status
live_viewer_connection_create(
1728 bt_self_component
*self_comp
, bt_self_component_class
*self_comp_class
,
1729 bt_logging_level log_level
, const char *url
, bool in_query
,
1730 struct lttng_live_msg_iter
*lttng_live_msg_iter
, struct live_viewer_connection
**viewer
)
1732 struct live_viewer_connection
*viewer_connection
;
1733 enum lttng_live_viewer_status status
;
1735 viewer_connection
= g_new0(struct live_viewer_connection
, 1);
1737 if (bt_socket_init(log_level
) != 0) {
1738 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
1739 "Failed to init socket");
1740 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1744 viewer_connection
->log_level
= log_level
;
1746 viewer_connection
->self_comp
= self_comp
;
1747 viewer_connection
->self_comp_class
= self_comp_class
;
1749 viewer_connection
->control_sock
= BT_INVALID_SOCKET
;
1750 viewer_connection
->port
= -1;
1751 viewer_connection
->in_query
= in_query
;
1752 viewer_connection
->lttng_live_msg_iter
= lttng_live_msg_iter
;
1753 viewer_connection
->url
= g_string_new(url
);
1754 if (!viewer_connection
->url
) {
1755 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
1756 "Failed to allocate URL buffer");
1757 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1761 BT_COMP_OR_COMP_CLASS_LOGD(self_comp
, self_comp_class
,
1762 "Establishing connection to url \"%s\"...", url
);
1763 status
= lttng_live_connect_viewer(viewer_connection
);
1765 * Only print error and append cause in case of error. not in case of
1768 if (status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
1769 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
1770 "Failed to establish connection: "
1774 } else if (status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
1777 BT_COMP_OR_COMP_CLASS_LOGD(self_comp
, self_comp_class
,
1778 "Connection to url \"%s\" is established", url
);
1780 *viewer
= viewer_connection
;
1781 status
= LTTNG_LIVE_VIEWER_STATUS_OK
;
1785 if (viewer_connection
) {
1786 live_viewer_connection_destroy(viewer_connection
);
1793 void live_viewer_connection_destroy(struct live_viewer_connection
*viewer_connection
)
1795 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1796 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
1798 if (!viewer_connection
) {
1802 BT_COMP_OR_COMP_CLASS_LOGD(self_comp
, self_comp_class
,
1803 "Closing connection to relay:"
1805 viewer_connection
->url
->str
);
1807 lttng_live_disconnect_viewer(viewer_connection
);
1809 if (viewer_connection
->url
) {
1810 g_string_free(viewer_connection
->url
, true);
1813 if (viewer_connection
->relay_hostname
) {
1814 g_string_free(viewer_connection
->relay_hostname
, true);
1817 if (viewer_connection
->target_hostname
) {
1818 g_string_free(viewer_connection
->target_hostname
, true);
1821 if (viewer_connection
->session_name
) {
1822 g_string_free(viewer_connection
->session_name
, true);
1825 if (viewer_connection
->proto
) {
1826 g_string_free(viewer_connection
->proto
, true);
1829 g_free(viewer_connection
);