2 * SPDX-License-Identifier: MIT
4 * Copyright 2019 Francis Deslauriers <francis.deslauriers@efficios.com>
5 * Copyright 2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
12 #include <babeltrace2/babeltrace.h>
14 #define BT_COMP_LOG_SELF_COMP (viewer_connection->self_comp)
15 #define BT_LOG_OUTPUT_LEVEL ((enum bt_log_level) viewer_connection->log_level)
16 #define BT_LOG_TAG "PLUGIN/SRC.CTF.LTTNG-LIVE/VIEWER"
17 #include "logging/comp-logging.h"
19 #include "common/common.h"
20 #include "compat/endian.h" /* IWYU pragma: keep */
22 #include "data-stream.hpp"
23 #include "lttng-live.hpp"
24 #include "lttng-viewer-abi.hpp"
25 #include "metadata.hpp"
26 #include "viewer-connection.hpp"
28 #define viewer_handle_send_recv_status(_self_comp, _self_comp_class, _status, _action, _msg_str) \
31 case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED: \
33 case LTTNG_LIVE_VIEWER_STATUS_ERROR: \
34 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(_self_comp, _self_comp_class, \
35 "Error " _action " " _msg_str); \
42 #define viewer_handle_send_status(_self_comp, _self_comp_class, _status, _msg_str) \
43 viewer_handle_send_recv_status(_self_comp, _self_comp_class, _status, "sending", _msg_str)
45 #define viewer_handle_recv_status(_self_comp, _self_comp_class, _status, _msg_str) \
46 viewer_handle_send_recv_status(_self_comp, _self_comp_class, _status, "receiving", _msg_str)
48 #define LTTNG_LIVE_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE_ERRNO(_self_comp, _self_comp_class, _msg, \
51 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(_self_comp, _self_comp_class, _msg ": %s" _fmt, \
52 bt_socket_errormsg(), ##__VA_ARGS__); \
55 static const char *lttng_viewer_command_string(enum lttng_viewer_command cmd
)
58 case LTTNG_VIEWER_CONNECT
:
60 case LTTNG_VIEWER_LIST_SESSIONS
:
61 return "LIST_SESSIONS";
62 case LTTNG_VIEWER_ATTACH_SESSION
:
63 return "ATTACH_SESSION";
64 case LTTNG_VIEWER_GET_NEXT_INDEX
:
65 return "GET_NEXT_INDEX";
66 case LTTNG_VIEWER_GET_PACKET
:
68 case LTTNG_VIEWER_GET_METADATA
:
69 return "GET_METADATA";
70 case LTTNG_VIEWER_GET_NEW_STREAMS
:
71 return "GET_NEW_STREAMS";
72 case LTTNG_VIEWER_CREATE_SESSION
:
73 return "CREATE_SESSION";
74 case LTTNG_VIEWER_DETACH_SESSION
:
75 return "DETACH_SESSION";
82 lttng_viewer_next_index_return_code_string(enum lttng_viewer_next_index_return_code code
)
85 case LTTNG_VIEWER_INDEX_OK
:
87 case LTTNG_VIEWER_INDEX_RETRY
:
89 case LTTNG_VIEWER_INDEX_HUP
:
91 case LTTNG_VIEWER_INDEX_ERR
:
93 case LTTNG_VIEWER_INDEX_INACTIVE
:
94 return "INDEX_INACTIVE";
95 case LTTNG_VIEWER_INDEX_EOF
:
102 static const char *lttng_viewer_next_index_return_code_string(uint32_t code
)
104 return lttng_viewer_next_index_return_code_string((lttng_viewer_next_index_return_code
) code
);
108 lttng_viewer_get_packet_return_code_string(enum lttng_viewer_get_packet_return_code code
)
111 case LTTNG_VIEWER_GET_PACKET_OK
:
112 return "GET_PACKET_OK";
113 case LTTNG_VIEWER_GET_PACKET_RETRY
:
114 return "GET_PACKET_RETRY";
115 case LTTNG_VIEWER_GET_PACKET_ERR
:
116 return "GET_PACKET_ERR";
117 case LTTNG_VIEWER_GET_PACKET_EOF
:
118 return "GET_PACKET_EOF";
124 static const char *lttng_viewer_get_packet_return_code_string(uint32_t code
)
126 return lttng_viewer_get_packet_return_code_string((lttng_viewer_get_packet_return_code
) code
);
129 static const char *lttng_viewer_seek_string(enum lttng_viewer_seek seek
)
132 case LTTNG_VIEWER_SEEK_BEGINNING
:
133 return "SEEK_BEGINNING";
134 case LTTNG_VIEWER_SEEK_LAST
:
141 static inline enum lttng_live_iterator_status
142 viewer_status_to_live_iterator_status(enum lttng_live_viewer_status viewer_status
)
144 switch (viewer_status
) {
145 case LTTNG_LIVE_VIEWER_STATUS_OK
:
146 return LTTNG_LIVE_ITERATOR_STATUS_OK
;
147 case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
:
148 return LTTNG_LIVE_ITERATOR_STATUS_AGAIN
;
149 case LTTNG_LIVE_VIEWER_STATUS_ERROR
:
150 return LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
156 static inline enum ctf_msg_iter_medium_status
157 viewer_status_to_ctf_msg_iter_medium_status(enum lttng_live_viewer_status viewer_status
)
159 switch (viewer_status
) {
160 case LTTNG_LIVE_VIEWER_STATUS_OK
:
161 return CTF_MSG_ITER_MEDIUM_STATUS_OK
;
162 case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
:
163 return CTF_MSG_ITER_MEDIUM_STATUS_AGAIN
;
164 case LTTNG_LIVE_VIEWER_STATUS_ERROR
:
165 return CTF_MSG_ITER_MEDIUM_STATUS_ERROR
;
171 static inline void viewer_connection_close_socket(struct live_viewer_connection
*viewer_connection
)
173 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
174 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
175 int ret
= bt_socket_close(viewer_connection
->control_sock
);
177 BT_COMP_OR_COMP_CLASS_LOGW_ERRNO(self_comp
, self_comp_class
,
178 "Error closing viewer connection socket: ", ".");
181 viewer_connection
->control_sock
= BT_INVALID_SOCKET
;
185 * This function receives a message from the Relay daemon.
186 * If it received the entire message, it returns _OK,
187 * If it's interrupted, it returns _INTERRUPTED,
188 * otherwise, it returns _ERROR.
190 static enum lttng_live_viewer_status
191 lttng_live_recv(struct live_viewer_connection
*viewer_connection
, void *buf
, size_t len
)
194 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
195 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
196 size_t total_received
= 0, to_receive
= len
;
197 struct lttng_live_msg_iter
*lttng_live_msg_iter
= viewer_connection
->lttng_live_msg_iter
;
198 enum lttng_live_viewer_status status
;
199 BT_SOCKET sock
= viewer_connection
->control_sock
;
202 * Receive a message from the Relay.
205 received
= bt_socket_recv(sock
, (char *) buf
+ total_received
, to_receive
, 0);
206 if (received
== BT_SOCKET_ERROR
) {
207 if (bt_socket_interrupted()) {
208 if (lttng_live_graph_is_canceled(lttng_live_msg_iter
)) {
210 * This interruption was due to a
211 * SIGINT and the graph is being torn
214 status
= LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
;
215 lttng_live_msg_iter
->was_interrupted
= true;
219 * A signal was received, but the graph
220 * is not being torn down. Carry on.
226 * For any other types of socket error, close
227 * the socket and return an error.
229 LTTNG_LIVE_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE_ERRNO(
230 self_comp
, self_comp_class
, "Error receiving from Relay", ".");
232 viewer_connection_close_socket(viewer_connection
);
233 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
236 } else if (received
== 0) {
238 * The recv() call returned 0. This means the
239 * connection was orderly shutdown from the other peer.
240 * If that happens when we are trying to receive
241 * a message from it, it means something when wrong.
242 * Close the socket and return an error.
244 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
245 "Remote side has closed connection");
246 viewer_connection_close_socket(viewer_connection
);
247 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
251 BT_ASSERT(received
<= to_receive
);
252 total_received
+= received
;
253 to_receive
-= received
;
255 } while (to_receive
> 0);
257 BT_ASSERT(total_received
== len
);
258 status
= LTTNG_LIVE_VIEWER_STATUS_OK
;
265 * This function sends a message to the Relay daemon.
266 * If it send the message, it returns _OK,
267 * If it's interrupted, it returns _INTERRUPTED,
268 * otherwise, it returns _ERROR.
270 static enum lttng_live_viewer_status
271 lttng_live_send(struct live_viewer_connection
*viewer_connection
, const void *buf
, size_t len
)
273 enum lttng_live_viewer_status status
;
274 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
275 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
276 struct lttng_live_msg_iter
*lttng_live_msg_iter
= viewer_connection
->lttng_live_msg_iter
;
277 BT_SOCKET sock
= viewer_connection
->control_sock
;
278 size_t to_send
= len
;
279 ssize_t total_sent
= 0;
282 ssize_t sent
= bt_socket_send_nosigpipe(sock
, (char *) buf
+ total_sent
, to_send
);
283 if (sent
== BT_SOCKET_ERROR
) {
284 if (bt_socket_interrupted()) {
285 if (lttng_live_graph_is_canceled(lttng_live_msg_iter
)) {
287 * This interruption was a SIGINT and
288 * the graph is being teared down.
290 status
= LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
;
291 lttng_live_msg_iter
->was_interrupted
= true;
295 * A signal was received, but the graph
296 * is not being teared down. Carry on.
302 * For any other types of socket error, close
303 * the socket and return an error.
305 LTTNG_LIVE_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE_ERRNO(
306 self_comp
, self_comp_class
, "Error sending to Relay", ".");
308 viewer_connection_close_socket(viewer_connection
);
309 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
314 BT_ASSERT(sent
<= to_send
);
318 } while (to_send
> 0);
320 BT_ASSERT(total_sent
== len
);
321 status
= LTTNG_LIVE_VIEWER_STATUS_OK
;
327 static int parse_url(struct live_viewer_connection
*viewer_connection
)
329 char error_buf
[256] = {0};
330 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
331 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
332 struct bt_common_lttng_live_url_parts lttng_live_url_parts
= {};
334 const char *path
= viewer_connection
->url
->str
;
340 lttng_live_url_parts
= bt_common_parse_lttng_live_url(path
, error_buf
, sizeof(error_buf
));
341 if (!lttng_live_url_parts
.proto
) {
342 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
343 "Invalid LTTng live URL format: %s", error_buf
);
346 viewer_connection
->proto
= lttng_live_url_parts
.proto
;
347 lttng_live_url_parts
.proto
= NULL
;
349 viewer_connection
->relay_hostname
= lttng_live_url_parts
.hostname
;
350 lttng_live_url_parts
.hostname
= NULL
;
352 if (lttng_live_url_parts
.port
>= 0) {
353 viewer_connection
->port
= lttng_live_url_parts
.port
;
355 viewer_connection
->port
= LTTNG_DEFAULT_NETWORK_VIEWER_PORT
;
358 viewer_connection
->target_hostname
= lttng_live_url_parts
.target_hostname
;
359 lttng_live_url_parts
.target_hostname
= NULL
;
361 if (lttng_live_url_parts
.session_name
) {
362 viewer_connection
->session_name
= lttng_live_url_parts
.session_name
;
363 lttng_live_url_parts
.session_name
= NULL
;
369 bt_common_destroy_lttng_live_url_parts(<tng_live_url_parts
);
373 static enum lttng_live_viewer_status
374 lttng_live_handshake(struct live_viewer_connection
*viewer_connection
)
376 struct lttng_viewer_cmd cmd
;
377 struct lttng_viewer_connect connect
;
378 enum lttng_live_viewer_status status
;
379 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
380 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
381 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(connect
);
382 char cmd_buf
[cmd_buf_len
];
384 BT_COMP_OR_COMP_CLASS_LOGD(
385 self_comp
, self_comp_class
,
386 "Handshaking with the relay daemon: cmd=%s, major-version=%u, minor-version=%u",
387 lttng_viewer_command_string(LTTNG_VIEWER_CONNECT
), LTTNG_LIVE_MAJOR
, LTTNG_LIVE_MINOR
);
389 cmd
.cmd
= htobe32(LTTNG_VIEWER_CONNECT
);
390 cmd
.data_size
= htobe64((uint64_t) sizeof(connect
));
391 cmd
.cmd_version
= htobe32(0);
393 connect
.viewer_session_id
= -1ULL; /* will be set on recv */
394 connect
.major
= htobe32(LTTNG_LIVE_MAJOR
);
395 connect
.minor
= htobe32(LTTNG_LIVE_MINOR
);
396 connect
.type
= htobe32(LTTNG_VIEWER_CLIENT_COMMAND
);
399 * Merge the cmd and connection request to prevent a write-write
400 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
401 * second write to be performed quickly in presence of Nagle's algorithm
403 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
404 memcpy(cmd_buf
+ sizeof(cmd
), &connect
, sizeof(connect
));
406 status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
407 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
408 viewer_handle_send_status(self_comp
, self_comp_class
, status
, "viewer connect command");
412 status
= lttng_live_recv(viewer_connection
, &connect
, sizeof(connect
));
413 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
414 viewer_handle_recv_status(self_comp
, self_comp_class
, status
, "viewer connect reply");
418 BT_COMP_OR_COMP_CLASS_LOGI(self_comp
, self_comp_class
, "Received viewer session ID : %" PRIu64
,
419 (uint64_t) be64toh(connect
.viewer_session_id
));
420 BT_COMP_OR_COMP_CLASS_LOGI(self_comp
, self_comp_class
, "Relayd version : %u.%u",
421 be32toh(connect
.major
), be32toh(connect
.minor
));
423 if (LTTNG_LIVE_MAJOR
!= be32toh(connect
.major
)) {
424 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
425 "Incompatible lttng-relayd protocol");
426 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
429 /* Use the smallest protocol version implemented. */
430 if (LTTNG_LIVE_MINOR
> be32toh(connect
.minor
)) {
431 viewer_connection
->minor
= be32toh(connect
.minor
);
433 viewer_connection
->minor
= LTTNG_LIVE_MINOR
;
435 viewer_connection
->major
= LTTNG_LIVE_MAJOR
;
437 status
= LTTNG_LIVE_VIEWER_STATUS_OK
;
445 static enum lttng_live_viewer_status
446 lttng_live_connect_viewer(struct live_viewer_connection
*viewer_connection
)
448 struct hostent
*host
;
449 struct sockaddr_in server_addr
;
450 enum lttng_live_viewer_status status
;
451 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
452 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
454 if (parse_url(viewer_connection
)) {
455 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
, "Failed to parse URL");
456 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
460 BT_COMP_OR_COMP_CLASS_LOGD(
461 self_comp
, self_comp_class
,
462 "Connecting to hostname : %s, port : %d, "
463 "target hostname : %s, session name : %s, proto : %s",
464 viewer_connection
->relay_hostname
->str
, viewer_connection
->port
,
465 !viewer_connection
->target_hostname
? "<none>" : viewer_connection
->target_hostname
->str
,
466 !viewer_connection
->session_name
? "<none>" : viewer_connection
->session_name
->str
,
467 viewer_connection
->proto
->str
);
469 host
= gethostbyname(viewer_connection
->relay_hostname
->str
);
471 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
472 "Cannot lookup hostname: hostname=\"%s\"",
473 viewer_connection
->relay_hostname
->str
);
474 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
478 if ((viewer_connection
->control_sock
= socket(AF_INET
, SOCK_STREAM
, 0)) == BT_INVALID_SOCKET
) {
479 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
480 "Socket creation failed: %s", bt_socket_errormsg());
481 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
485 server_addr
.sin_family
= AF_INET
;
486 server_addr
.sin_port
= htons(viewer_connection
->port
);
487 server_addr
.sin_addr
= *((struct in_addr
*) host
->h_addr
);
488 memset(&(server_addr
.sin_zero
), 0, 8);
490 if (connect(viewer_connection
->control_sock
, (struct sockaddr
*) &server_addr
,
491 sizeof(struct sockaddr
)) == BT_SOCKET_ERROR
) {
492 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
, "Connection failed: %s",
493 bt_socket_errormsg());
494 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
498 status
= lttng_live_handshake(viewer_connection
);
501 * Only print error and append cause in case of error. not in case of
504 if (status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
505 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
506 "Viewer handshake failed");
508 } else if (status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
515 if (viewer_connection
->control_sock
!= BT_INVALID_SOCKET
) {
516 if (bt_socket_close(viewer_connection
->control_sock
) == BT_SOCKET_ERROR
) {
517 BT_COMP_OR_COMP_CLASS_LOGW(self_comp
, self_comp_class
, "Error closing socket: %s.",
518 bt_socket_errormsg());
521 viewer_connection
->control_sock
= BT_INVALID_SOCKET
;
526 static void lttng_live_disconnect_viewer(struct live_viewer_connection
*viewer_connection
)
528 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
529 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
531 if (viewer_connection
->control_sock
== BT_INVALID_SOCKET
) {
534 if (bt_socket_close(viewer_connection
->control_sock
) == BT_SOCKET_ERROR
) {
535 BT_COMP_OR_COMP_CLASS_LOGW(self_comp
, self_comp_class
, "Error closing socket: %s",
536 bt_socket_errormsg());
537 viewer_connection
->control_sock
= BT_INVALID_SOCKET
;
541 static int list_update_session(bt_value
*results
, const struct lttng_viewer_session
*session
,
542 bool *_found
, struct live_viewer_connection
*viewer_connection
)
544 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
545 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
548 bt_value
*map
= NULL
;
549 bt_value
*hostname
= NULL
;
550 bt_value
*session_name
= NULL
;
551 bt_value
*btval
= NULL
;
554 len
= bt_value_array_get_length(results
);
555 for (i
= 0; i
< len
; i
++) {
556 const char *hostname_str
= NULL
;
557 const char *session_name_str
= NULL
;
559 map
= bt_value_array_borrow_element_by_index(results
, i
);
560 hostname
= bt_value_map_borrow_entry_value(map
, "target-hostname");
562 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
563 "Error borrowing \"target-hostname\" entry.");
567 session_name
= bt_value_map_borrow_entry_value(map
, "session-name");
569 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
570 "Error borrowing \"session-name\" entry.");
574 hostname_str
= bt_value_string_get(hostname
);
575 session_name_str
= bt_value_string_get(session_name
);
577 if (strcmp(session
->hostname
, hostname_str
) == 0 &&
578 strcmp(session
->session_name
, session_name_str
) == 0) {
580 uint32_t streams
= be32toh(session
->streams
);
581 uint32_t clients
= be32toh(session
->clients
);
585 btval
= bt_value_map_borrow_entry_value(map
, "stream-count");
587 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
588 "Error borrowing \"stream-count\" entry.");
592 val
= bt_value_integer_unsigned_get(btval
);
595 bt_value_integer_unsigned_set(btval
, val
);
597 btval
= bt_value_map_borrow_entry_value(map
, "client-count");
599 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
600 "Error borrowing \"client-count\" entry.");
604 val
= bt_value_integer_unsigned_get(btval
);
606 val
= bt_max_t(int64_t, clients
, val
);
607 bt_value_integer_unsigned_set(btval
, val
);
619 static int list_append_session(bt_value
*results
, GString
*base_url
,
620 const struct lttng_viewer_session
*session
,
621 struct live_viewer_connection
*viewer_connection
)
624 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
625 bt_value_map_insert_entry_status insert_status
;
626 bt_value_array_append_element_status append_status
;
627 bt_value
*map
= NULL
;
632 * If the session already exists, add the stream count to it,
633 * and do max of client counts.
635 ret
= list_update_session(results
, session
, &found
, viewer_connection
);
640 map
= bt_value_map_create();
642 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error creating map value.");
647 if (base_url
->len
< 1) {
648 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error: base_url length smaller than 1.");
656 url
= g_string_new(base_url
->str
);
657 g_string_append(url
, "/host/");
658 g_string_append(url
, session
->hostname
);
659 g_string_append_c(url
, '/');
660 g_string_append(url
, session
->session_name
);
662 insert_status
= bt_value_map_insert_string_entry(map
, "url", url
->str
);
663 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
664 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error inserting \"url\" entry.");
670 * key = "target-hostname",
673 insert_status
= bt_value_map_insert_string_entry(map
, "target-hostname", session
->hostname
);
674 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
675 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
676 "Error inserting \"target-hostname\" entry.");
682 * key = "session-name",
685 insert_status
= bt_value_map_insert_string_entry(map
, "session-name", session
->session_name
);
686 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
687 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error inserting \"session-name\" entry.");
697 uint32_t live_timer
= be32toh(session
->live_timer
);
699 insert_status
= bt_value_map_insert_unsigned_integer_entry(map
, "timer-us", live_timer
);
700 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
701 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error inserting \"timer-us\" entry.");
708 * key = "stream-count",
712 uint32_t streams
= be32toh(session
->streams
);
714 insert_status
= bt_value_map_insert_unsigned_integer_entry(map
, "stream-count", streams
);
715 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
716 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
717 "Error inserting \"stream-count\" entry.");
724 * key = "client-count",
728 uint32_t clients
= be32toh(session
->clients
);
730 insert_status
= bt_value_map_insert_unsigned_integer_entry(map
, "client-count", clients
);
731 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
732 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
733 "Error inserting \"client-count\" entry.");
739 append_status
= bt_value_array_append_element(results
, map
);
740 if (append_status
!= BT_VALUE_ARRAY_APPEND_ELEMENT_STATUS_OK
) {
741 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error appending map to results.");
747 g_string_free(url
, true);
749 BT_VALUE_PUT_REF_AND_RESET(map
);
754 * Data structure returned:
765 * key = "target-hostname",
769 * key = "session-name",
777 * key = "stream-count",
781 * key = "client-count",
789 bt_component_class_query_method_status
790 live_viewer_connection_list_sessions(struct live_viewer_connection
*viewer_connection
,
791 const bt_value
**user_result
)
793 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
794 bt_component_class_query_method_status status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK
;
795 bt_value
*result
= NULL
;
796 enum lttng_live_viewer_status viewer_status
;
797 struct lttng_viewer_cmd cmd
;
798 struct lttng_viewer_list_sessions list
;
799 uint32_t i
, sessions_count
;
801 result
= bt_value_array_create();
803 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error creating array");
804 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR
;
808 BT_LOGD("Requesting list of sessions: cmd=%s",
809 lttng_viewer_command_string(LTTNG_VIEWER_LIST_SESSIONS
));
811 cmd
.cmd
= htobe32(LTTNG_VIEWER_LIST_SESSIONS
);
812 cmd
.data_size
= htobe64((uint64_t) 0);
813 cmd
.cmd_version
= htobe32(0);
815 viewer_status
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
816 if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
817 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error sending list sessions command");
818 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
820 } else if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
821 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_AGAIN
;
825 viewer_status
= lttng_live_recv(viewer_connection
, &list
, sizeof(list
));
826 if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
827 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error receiving session list");
828 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
830 } else if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
831 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_AGAIN
;
835 sessions_count
= be32toh(list
.sessions_count
);
836 for (i
= 0; i
< sessions_count
; i
++) {
837 struct lttng_viewer_session lsession
;
839 viewer_status
= lttng_live_recv(viewer_connection
, &lsession
, sizeof(lsession
));
840 if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
841 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error receiving session:");
842 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
844 } else if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
845 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_AGAIN
;
849 lsession
.hostname
[LTTNG_VIEWER_HOST_NAME_MAX
- 1] = '\0';
850 lsession
.session_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
851 if (list_append_session(result
, viewer_connection
->url
, &lsession
, viewer_connection
)) {
852 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "Error appending session");
853 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
858 *user_result
= result
;
861 BT_VALUE_PUT_REF_AND_RESET(result
);
866 static enum lttng_live_viewer_status
867 lttng_live_query_session_ids(struct lttng_live_msg_iter
*lttng_live_msg_iter
)
869 struct lttng_viewer_cmd cmd
;
870 struct lttng_viewer_list_sessions list
;
871 struct lttng_viewer_session lsession
;
872 uint32_t i
, sessions_count
;
874 enum lttng_live_viewer_status status
;
875 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
876 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
877 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
879 BT_COMP_LOGD("Asking the relay daemon for the list of sessions: cmd=%s",
880 lttng_viewer_command_string(LTTNG_VIEWER_LIST_SESSIONS
));
882 cmd
.cmd
= htobe32(LTTNG_VIEWER_LIST_SESSIONS
);
883 cmd
.data_size
= htobe64((uint64_t) 0);
884 cmd
.cmd_version
= htobe32(0);
886 status
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
887 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
888 viewer_handle_send_status(self_comp
, self_comp_class
, status
, "list sessions command");
892 status
= lttng_live_recv(viewer_connection
, &list
, sizeof(list
));
893 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
894 viewer_handle_recv_status(self_comp
, self_comp_class
, status
, "session list reply");
898 sessions_count
= be32toh(list
.sessions_count
);
899 for (i
= 0; i
< sessions_count
; i
++) {
900 status
= lttng_live_recv(viewer_connection
, &lsession
, sizeof(lsession
));
901 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
902 viewer_handle_recv_status(self_comp
, self_comp_class
, status
, "session reply");
905 lsession
.hostname
[LTTNG_VIEWER_HOST_NAME_MAX
- 1] = '\0';
906 lsession
.session_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
907 session_id
= be64toh(lsession
.id
);
909 BT_COMP_LOGI("Adding session to internal list: "
910 "session-id=%" PRIu64
", hostname=\"%s\", session-name=\"%s\"",
911 session_id
, lsession
.hostname
, lsession
.session_name
);
913 if ((strncmp(lsession
.session_name
, viewer_connection
->session_name
->str
,
914 LTTNG_VIEWER_NAME_MAX
) == 0) &&
915 (strncmp(lsession
.hostname
, viewer_connection
->target_hostname
->str
,
916 LTTNG_VIEWER_HOST_NAME_MAX
) == 0)) {
917 if (lttng_live_add_session(lttng_live_msg_iter
, session_id
, lsession
.hostname
,
918 lsession
.session_name
)) {
919 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Failed to add live session");
920 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
926 status
= LTTNG_LIVE_VIEWER_STATUS_OK
;
932 enum lttng_live_viewer_status
933 lttng_live_create_viewer_session(struct lttng_live_msg_iter
*lttng_live_msg_iter
)
935 struct lttng_viewer_cmd cmd
;
936 struct lttng_viewer_create_session_response resp
;
937 enum lttng_live_viewer_status status
;
938 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
939 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
940 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
942 BT_COMP_OR_COMP_CLASS_LOGD(self_comp
, self_comp_class
, "Creating a viewer session: cmd=%s",
943 lttng_viewer_command_string(LTTNG_VIEWER_CREATE_SESSION
));
945 cmd
.cmd
= htobe32(LTTNG_VIEWER_CREATE_SESSION
);
946 cmd
.data_size
= htobe64((uint64_t) 0);
947 cmd
.cmd_version
= htobe32(0);
949 status
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
950 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
951 viewer_handle_send_status(self_comp
, self_comp_class
, status
, "create session command");
955 status
= lttng_live_recv(viewer_connection
, &resp
, sizeof(resp
));
956 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
957 viewer_handle_recv_status(self_comp
, self_comp_class
, status
, "create session reply");
961 if (be32toh(resp
.status
) != LTTNG_VIEWER_CREATE_SESSION_OK
) {
962 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Error creating viewer session");
963 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
967 status
= lttng_live_query_session_ids(lttng_live_msg_iter
);
968 if (status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
969 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Failed to query live viewer session ids");
971 } else if (status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
979 static enum lttng_live_viewer_status
receive_streams(struct lttng_live_session
*session
,
980 uint32_t stream_count
,
981 bt_self_message_iterator
*self_msg_iter
)
984 struct lttng_live_msg_iter
*lttng_live_msg_iter
= session
->lttng_live_msg_iter
;
985 enum lttng_live_viewer_status status
;
986 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
987 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
989 BT_COMP_LOGI("Getting %" PRIu32
" new streams", stream_count
);
990 for (i
= 0; i
< stream_count
; i
++) {
991 struct lttng_viewer_stream stream
;
992 struct lttng_live_stream_iterator
*live_stream
;
994 uint64_t ctf_trace_id
;
996 status
= lttng_live_recv(viewer_connection
, &stream
, sizeof(stream
));
997 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
998 viewer_handle_recv_status(self_comp
, NULL
, status
, "stream reply");
1001 stream
.path_name
[LTTNG_VIEWER_PATH_MAX
- 1] = '\0';
1002 stream
.channel_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
1003 stream_id
= be64toh(stream
.id
);
1004 ctf_trace_id
= be64toh(stream
.ctf_trace_id
);
1006 if (stream
.metadata_flag
) {
1007 BT_COMP_LOGI(" metadata stream %" PRIu64
" : %s/%s", stream_id
, stream
.path_name
,
1008 stream
.channel_name
);
1009 if (lttng_live_metadata_create_stream(session
, ctf_trace_id
, stream_id
)) {
1010 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Error creating metadata stream");
1011 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1014 session
->lazy_stream_msg_init
= true;
1016 BT_COMP_LOGI(" stream %" PRIu64
" : %s/%s", stream_id
, stream
.path_name
,
1017 stream
.channel_name
);
1019 lttng_live_stream_iterator_create(session
, ctf_trace_id
, stream_id
, self_msg_iter
);
1021 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Error creating stream");
1022 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1027 status
= LTTNG_LIVE_VIEWER_STATUS_OK
;
1033 enum lttng_live_viewer_status
lttng_live_session_attach(struct lttng_live_session
*session
,
1034 bt_self_message_iterator
*self_msg_iter
)
1036 struct lttng_viewer_cmd cmd
;
1037 enum lttng_live_viewer_status status
;
1038 struct lttng_viewer_attach_session_request rq
;
1039 struct lttng_viewer_attach_session_response rp
;
1040 struct lttng_live_msg_iter
*lttng_live_msg_iter
= session
->lttng_live_msg_iter
;
1041 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
1042 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1043 uint64_t session_id
= session
->id
;
1044 uint32_t streams_count
;
1045 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1046 char cmd_buf
[cmd_buf_len
];
1048 BT_COMP_LOGD("Attaching to session: cmd=%s, session-id=%" PRIu64
", seek=%s",
1049 lttng_viewer_command_string(LTTNG_VIEWER_ATTACH_SESSION
), session_id
,
1050 lttng_viewer_seek_string(LTTNG_VIEWER_SEEK_LAST
));
1052 cmd
.cmd
= htobe32(LTTNG_VIEWER_ATTACH_SESSION
);
1053 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1054 cmd
.cmd_version
= htobe32(0);
1056 memset(&rq
, 0, sizeof(rq
));
1057 rq
.session_id
= htobe64(session_id
);
1058 // TODO: add cmd line parameter to select seek beginning
1059 // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING);
1060 rq
.seek
= htobe32(LTTNG_VIEWER_SEEK_LAST
);
1063 * Merge the cmd and connection request to prevent a write-write
1064 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1065 * second write to be performed quickly in presence of Nagle's algorithm.
1067 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1068 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1069 status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1070 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1071 viewer_handle_send_status(self_comp
, NULL
, status
, "attach session command");
1075 status
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1076 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1077 viewer_handle_recv_status(self_comp
, NULL
, status
, "attach session reply");
1081 streams_count
= be32toh(rp
.streams_count
);
1082 switch (be32toh(rp
.status
)) {
1083 case LTTNG_VIEWER_ATTACH_OK
:
1085 case LTTNG_VIEWER_ATTACH_UNK
:
1086 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Session id %" PRIu64
" is unknown", session_id
);
1087 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1089 case LTTNG_VIEWER_ATTACH_ALREADY
:
1090 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "There is already a viewer attached to this session");
1091 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1093 case LTTNG_VIEWER_ATTACH_NOT_LIVE
:
1094 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Not a live session");
1095 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1097 case LTTNG_VIEWER_ATTACH_SEEK_ERR
:
1098 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Wrong seek parameter");
1099 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1102 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Unknown attach return code %u", be32toh(rp
.status
));
1103 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1107 /* We receive the initial list of streams. */
1108 status
= receive_streams(session
, streams_count
, self_msg_iter
);
1110 case LTTNG_LIVE_VIEWER_STATUS_OK
:
1112 case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
:
1114 case LTTNG_LIVE_VIEWER_STATUS_ERROR
:
1115 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Error receiving streams");
1121 session
->attached
= true;
1122 session
->new_streams_needed
= false;
1128 enum lttng_live_viewer_status
lttng_live_session_detach(struct lttng_live_session
*session
)
1130 struct lttng_viewer_cmd cmd
;
1131 enum lttng_live_viewer_status status
;
1132 struct lttng_viewer_detach_session_request rq
;
1133 struct lttng_viewer_detach_session_response rp
;
1134 struct lttng_live_msg_iter
*lttng_live_msg_iter
= session
->lttng_live_msg_iter
;
1135 bt_self_component
*self_comp
= session
->self_comp
;
1136 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
1137 uint64_t session_id
= session
->id
;
1138 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1139 char cmd_buf
[cmd_buf_len
];
1142 * The session might already be detached and the viewer socket might
1143 * already been closed. This happens when calling this function when
1144 * tearing down the graph after an error.
1146 if (!session
->attached
|| viewer_connection
->control_sock
== BT_INVALID_SOCKET
) {
1147 return LTTNG_LIVE_VIEWER_STATUS_OK
;
1150 BT_COMP_LOGD("Detaching from session: cmd=%s, session-id=%" PRIu64
,
1151 lttng_viewer_command_string(LTTNG_VIEWER_DETACH_SESSION
), session_id
);
1153 cmd
.cmd
= htobe32(LTTNG_VIEWER_DETACH_SESSION
);
1154 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1155 cmd
.cmd_version
= htobe32(0);
1157 memset(&rq
, 0, sizeof(rq
));
1158 rq
.session_id
= htobe64(session_id
);
1161 * Merge the cmd and connection request to prevent a write-write
1162 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1163 * second write to be performed quickly in presence of Nagle's algorithm.
1165 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1166 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1167 status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1168 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1169 viewer_handle_send_status(self_comp
, NULL
, status
, "detach session command");
1173 status
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1174 if (status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1175 viewer_handle_recv_status(self_comp
, NULL
, status
, "detach session reply");
1179 switch (be32toh(rp
.status
)) {
1180 case LTTNG_VIEWER_DETACH_SESSION_OK
:
1182 case LTTNG_VIEWER_DETACH_SESSION_UNK
:
1183 BT_COMP_LOGW("Session id %" PRIu64
" is unknown", session_id
);
1184 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1186 case LTTNG_VIEWER_DETACH_SESSION_ERR
:
1187 BT_COMP_LOGW("Error detaching session id %" PRIu64
"", session_id
);
1188 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1191 BT_COMP_LOGE("Unknown detach return code %u", be32toh(rp
.status
));
1192 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1196 session
->attached
= false;
1198 status
= LTTNG_LIVE_VIEWER_STATUS_OK
;
1204 enum lttng_live_get_one_metadata_status
1205 lttng_live_get_one_metadata_packet(struct lttng_live_trace
*trace
, FILE *fp
, size_t *reply_len
)
1208 enum lttng_live_get_one_metadata_status status
;
1209 enum lttng_live_viewer_status viewer_status
;
1210 struct lttng_viewer_cmd cmd
;
1211 struct lttng_viewer_get_metadata rq
;
1212 struct lttng_viewer_metadata_packet rp
;
1215 struct lttng_live_session
*session
= trace
->session
;
1216 struct lttng_live_msg_iter
*lttng_live_msg_iter
= session
->lttng_live_msg_iter
;
1217 struct lttng_live_metadata
*metadata
= trace
->metadata
;
1218 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
1219 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1220 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1221 char cmd_buf
[cmd_buf_len
];
1223 BT_COMP_LOGD("Requesting new metadata for trace:"
1224 "cmd=%s, trace-id=%" PRIu64
", metadata-stream-id=%" PRIu64
,
1225 lttng_viewer_command_string(LTTNG_VIEWER_GET_METADATA
), trace
->id
,
1226 metadata
->stream_id
);
1228 rq
.stream_id
= htobe64(metadata
->stream_id
);
1229 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_METADATA
);
1230 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1231 cmd
.cmd_version
= htobe32(0);
1234 * Merge the cmd and connection request to prevent a write-write
1235 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1236 * second write to be performed quickly in presence of Nagle's algorithm.
1238 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1239 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1240 viewer_status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1241 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1242 viewer_handle_send_status(self_comp
, NULL
, viewer_status
, "get metadata command");
1243 status
= (enum lttng_live_get_one_metadata_status
) viewer_status
;
1247 viewer_status
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1248 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1249 viewer_handle_recv_status(self_comp
, NULL
, viewer_status
, "get metadata reply");
1250 status
= (enum lttng_live_get_one_metadata_status
) viewer_status
;
1254 switch (be32toh(rp
.status
)) {
1255 case LTTNG_VIEWER_METADATA_OK
:
1256 BT_COMP_LOGD("Received get_metadata response: ok");
1258 case LTTNG_VIEWER_NO_NEW_METADATA
:
1259 BT_COMP_LOGD("Received get_metadata response: no new");
1260 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_END
;
1262 case LTTNG_VIEWER_METADATA_ERR
:
1264 * The Relayd cannot find this stream id. Maybe its
1265 * gone already. This can happen in short lived UST app
1266 * in a per-pid session.
1268 BT_COMP_LOGD("Received get_metadata response: error");
1269 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_CLOSED
;
1272 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Received get_metadata response: unknown");
1273 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR
;
1277 len
= be64toh(rp
.len
);
1280 * We received a `LTTNG_VIEWER_METADATA_OK` with a packet
1281 * length of 0. This means we must try again. This scenario
1282 * arises when a clear command is performed on an lttng session.
1285 "Expecting a metadata packet of size 0. Retry to get a packet from the relay.");
1286 goto empty_metadata_packet_retry
;
1289 BT_COMP_LOGD("Writing %" PRIu64
" bytes to metadata", len
);
1291 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Erroneous response length");
1292 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR
;
1296 data
= g_new0(gchar
, len
);
1298 BT_COMP_LOGE_APPEND_CAUSE_ERRNO(self_comp
, "Failed to allocate data buffer", ".");
1299 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR
;
1303 viewer_status
= lttng_live_recv(viewer_connection
, data
, len
);
1304 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1305 viewer_handle_recv_status(self_comp
, NULL
, viewer_status
, "get metadata packet");
1306 status
= (enum lttng_live_get_one_metadata_status
) viewer_status
;
1311 * Write the metadata to the file handle.
1313 writelen
= fwrite(data
, sizeof(uint8_t), len
, fp
);
1314 if (writelen
!= len
) {
1315 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Writing in the metadata file stream");
1316 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR
;
1320 empty_metadata_packet_retry
:
1322 status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_OK
;
1330 * Assign the fields from a lttng_viewer_index to a packet_index.
1332 static void lttng_index_to_packet_index(struct lttng_viewer_index
*lindex
,
1333 struct packet_index
*pindex
)
1338 pindex
->offset
= be64toh(lindex
->offset
);
1339 pindex
->packet_size
= be64toh(lindex
->packet_size
);
1340 pindex
->content_size
= be64toh(lindex
->content_size
);
1341 pindex
->ts_cycles
.timestamp_begin
= be64toh(lindex
->timestamp_begin
);
1342 pindex
->ts_cycles
.timestamp_end
= be64toh(lindex
->timestamp_end
);
1343 pindex
->events_discarded
= be64toh(lindex
->events_discarded
);
1346 static void lttng_live_need_new_streams(struct lttng_live_msg_iter
*lttng_live_msg_iter
)
1348 uint64_t session_idx
;
1349 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
1351 for (session_idx
= 0; session_idx
< lttng_live_msg_iter
->sessions
->len
; session_idx
++) {
1352 struct lttng_live_session
*session
=
1353 (lttng_live_session
*) g_ptr_array_index(lttng_live_msg_iter
->sessions
, session_idx
);
1354 BT_COMP_LOGD("Marking session as needing new streams: "
1355 "session-id=%" PRIu64
,
1357 session
->new_streams_needed
= true;
1361 enum lttng_live_iterator_status
1362 lttng_live_get_next_index(struct lttng_live_msg_iter
*lttng_live_msg_iter
,
1363 struct lttng_live_stream_iterator
*stream
, struct packet_index
*index
)
1365 struct lttng_viewer_cmd cmd
;
1366 struct lttng_viewer_get_next_index rq
;
1367 enum lttng_live_viewer_status viewer_status
;
1368 struct lttng_viewer_index rp
;
1369 enum lttng_live_iterator_status status
;
1370 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
1371 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1372 struct lttng_live_trace
*trace
= stream
->trace
;
1373 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1374 char cmd_buf
[cmd_buf_len
];
1375 uint32_t flags
, rp_status
;
1377 BT_COMP_LOGD("Requesting next index for stream: cmd=%s, "
1378 "viewer-stream-id=%" PRIu64
,
1379 lttng_viewer_command_string(LTTNG_VIEWER_GET_NEXT_INDEX
),
1380 stream
->viewer_stream_id
);
1381 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_NEXT_INDEX
);
1382 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1383 cmd
.cmd_version
= htobe32(0);
1385 memset(&rq
, 0, sizeof(rq
));
1386 rq
.stream_id
= htobe64(stream
->viewer_stream_id
);
1389 * Merge the cmd and connection request to prevent a write-write
1390 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1391 * second write to be performed quickly in presence of Nagle's algorithm.
1393 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1394 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1396 viewer_status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1397 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1398 viewer_handle_send_status(self_comp
, NULL
, viewer_status
, "get next index command");
1402 viewer_status
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1403 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1404 viewer_handle_recv_status(self_comp
, NULL
, viewer_status
, "get next index reply");
1408 flags
= be32toh(rp
.flags
);
1409 rp_status
= be32toh(rp
.status
);
1411 BT_COMP_LOGD("Received response from relay daemon: cmd=%s, response=%s",
1412 lttng_viewer_command_string(LTTNG_VIEWER_GET_NEXT_INDEX
),
1413 lttng_viewer_next_index_return_code_string(rp_status
));
1415 if (flags
& LTTNG_VIEWER_FLAG_NEW_STREAM
) {
1416 BT_COMP_LOGD("Marking all sessions as possibly needing new streams: "
1417 "response=%s, response-flag=NEW_STREAM",
1418 lttng_viewer_next_index_return_code_string(rp_status
));
1419 lttng_live_need_new_streams(lttng_live_msg_iter
);
1422 switch (rp_status
) {
1423 case LTTNG_VIEWER_INDEX_INACTIVE
:
1425 uint64_t ctf_stream_class_id
;
1427 memset(index
, 0, sizeof(struct packet_index
));
1428 index
->ts_cycles
.timestamp_end
= be64toh(rp
.timestamp_end
);
1429 stream
->current_inactivity_ts
= index
->ts_cycles
.timestamp_end
;
1430 ctf_stream_class_id
= be64toh(rp
.stream_id
);
1431 if (stream
->ctf_stream_class_id
.is_set
) {
1432 BT_ASSERT(stream
->ctf_stream_class_id
.value
== ctf_stream_class_id
);
1434 stream
->ctf_stream_class_id
.value
= ctf_stream_class_id
;
1435 stream
->ctf_stream_class_id
.is_set
= true;
1437 lttng_live_stream_iterator_set_state(stream
, LTTNG_LIVE_STREAM_QUIESCENT
);
1438 status
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
1441 case LTTNG_VIEWER_INDEX_OK
:
1443 uint64_t ctf_stream_class_id
;
1445 lttng_index_to_packet_index(&rp
, index
);
1446 ctf_stream_class_id
= be64toh(rp
.stream_id
);
1447 if (stream
->ctf_stream_class_id
.is_set
) {
1448 BT_ASSERT(stream
->ctf_stream_class_id
.value
== ctf_stream_class_id
);
1450 stream
->ctf_stream_class_id
.value
= ctf_stream_class_id
;
1451 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 status
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
1464 case LTTNG_VIEWER_INDEX_RETRY
:
1465 memset(index
, 0, sizeof(struct packet_index
));
1466 lttng_live_stream_iterator_set_state(stream
, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
);
1467 status
= LTTNG_LIVE_ITERATOR_STATUS_AGAIN
;
1469 case LTTNG_VIEWER_INDEX_HUP
:
1470 memset(index
, 0, sizeof(struct packet_index
));
1471 index
->offset
= EOF
;
1472 lttng_live_stream_iterator_set_state(stream
, LTTNG_LIVE_STREAM_EOF
);
1473 stream
->has_stream_hung_up
= true;
1474 status
= LTTNG_LIVE_ITERATOR_STATUS_END
;
1476 case LTTNG_VIEWER_INDEX_ERR
:
1477 memset(index
, 0, sizeof(struct packet_index
));
1478 lttng_live_stream_iterator_set_state(stream
, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
);
1479 status
= LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
1482 BT_COMP_LOGD("Received get_next_index response: unknown value");
1483 memset(index
, 0, sizeof(struct packet_index
));
1484 lttng_live_stream_iterator_set_state(stream
, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
);
1485 status
= LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
1492 status
= viewer_status_to_live_iterator_status(viewer_status
);
1497 enum ctf_msg_iter_medium_status
1498 lttng_live_get_stream_bytes(struct lttng_live_msg_iter
*lttng_live_msg_iter
,
1499 struct lttng_live_stream_iterator
*stream
, uint8_t *buf
,
1500 uint64_t offset
, uint64_t req_len
, uint64_t *recv_len
)
1502 enum ctf_msg_iter_medium_status status
;
1503 enum lttng_live_viewer_status viewer_status
;
1504 struct lttng_viewer_trace_packet rp
;
1505 struct lttng_viewer_cmd cmd
;
1506 struct lttng_viewer_get_packet rq
;
1507 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
1508 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1509 struct lttng_live_trace
*trace
= stream
->trace
;
1510 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1511 char cmd_buf
[cmd_buf_len
];
1512 uint32_t flags
, rp_status
;
1514 BT_COMP_LOGD("Requesting data from stream: cmd=%s, "
1515 "offset=%" PRIu64
", request-len=%" PRIu64
,
1516 lttng_viewer_command_string(LTTNG_VIEWER_GET_PACKET
), offset
, req_len
);
1518 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_PACKET
);
1519 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1520 cmd
.cmd_version
= htobe32(0);
1522 memset(&rq
, 0, sizeof(rq
));
1523 rq
.stream_id
= htobe64(stream
->viewer_stream_id
);
1524 rq
.offset
= htobe64(offset
);
1525 rq
.len
= htobe32(req_len
);
1528 * Merge the cmd and connection request to prevent a write-write
1529 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1530 * second write to be performed quickly in presence of Nagle's algorithm.
1532 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1533 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1535 viewer_status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1536 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1537 viewer_handle_send_status(self_comp
, NULL
, viewer_status
, "get data packet command");
1538 goto error_convert_status
;
1541 viewer_status
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1542 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1543 viewer_handle_recv_status(self_comp
, NULL
, viewer_status
, "get data packet reply");
1544 goto error_convert_status
;
1547 flags
= be32toh(rp
.flags
);
1548 rp_status
= be32toh(rp
.status
);
1550 BT_COMP_LOGD("Received response from relay daemon: cmd=%s, response=%s",
1551 lttng_viewer_command_string(LTTNG_VIEWER_GET_PACKET
),
1552 lttng_viewer_get_packet_return_code_string(rp_status
));
1553 switch (rp_status
) {
1554 case LTTNG_VIEWER_GET_PACKET_OK
:
1555 req_len
= be32toh(rp
.len
);
1556 BT_COMP_LOGD("Got packet from relay daemon: response=%s, packet-len=%" PRIu64
"",
1557 lttng_viewer_get_packet_return_code_string(rp_status
), req_len
);
1559 case LTTNG_VIEWER_GET_PACKET_RETRY
:
1560 /* Unimplemented by relay daemon */
1561 status
= CTF_MSG_ITER_MEDIUM_STATUS_AGAIN
;
1563 case LTTNG_VIEWER_GET_PACKET_ERR
:
1564 if (flags
& LTTNG_VIEWER_FLAG_NEW_METADATA
) {
1565 BT_COMP_LOGD("Marking trace as needing new metadata: "
1566 "response=%s, response-flag=NEW_METADATA, trace-id=%" PRIu64
,
1567 lttng_viewer_next_index_return_code_string(rp_status
), trace
->id
);
1568 trace
->metadata_stream_state
= LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED
;
1570 if (flags
& LTTNG_VIEWER_FLAG_NEW_STREAM
) {
1571 BT_COMP_LOGD("Marking all sessions as possibly needing new streams: "
1572 "response=%s, response-flag=NEW_STREAM",
1573 lttng_viewer_next_index_return_code_string(rp_status
));
1574 lttng_live_need_new_streams(lttng_live_msg_iter
);
1576 if (flags
& (LTTNG_VIEWER_FLAG_NEW_METADATA
| LTTNG_VIEWER_FLAG_NEW_STREAM
)) {
1577 status
= CTF_MSG_ITER_MEDIUM_STATUS_AGAIN
;
1578 BT_COMP_LOGD("Reply with any one flags set means we should retry: response=%s",
1579 lttng_viewer_get_packet_return_code_string(rp_status
));
1582 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Received get_data_packet response: error");
1583 status
= CTF_MSG_ITER_MEDIUM_STATUS_ERROR
;
1585 case LTTNG_VIEWER_GET_PACKET_EOF
:
1586 status
= CTF_MSG_ITER_MEDIUM_STATUS_EOF
;
1589 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Received get_data_packet response: unknown (%d)",
1591 status
= CTF_MSG_ITER_MEDIUM_STATUS_ERROR
;
1596 status
= CTF_MSG_ITER_MEDIUM_STATUS_ERROR
;
1600 viewer_status
= lttng_live_recv(viewer_connection
, buf
, req_len
);
1601 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1602 viewer_handle_recv_status(self_comp
, NULL
, viewer_status
, "get data packet");
1603 goto error_convert_status
;
1605 *recv_len
= req_len
;
1607 status
= CTF_MSG_ITER_MEDIUM_STATUS_OK
;
1610 error_convert_status
:
1611 status
= viewer_status_to_ctf_msg_iter_medium_status(viewer_status
);
1617 * Request new streams for a session.
1619 enum lttng_live_iterator_status
1620 lttng_live_session_get_new_streams(struct lttng_live_session
*session
,
1621 bt_self_message_iterator
*self_msg_iter
)
1623 enum lttng_live_iterator_status status
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
1624 struct lttng_viewer_cmd cmd
;
1625 struct lttng_viewer_new_streams_request rq
;
1626 struct lttng_viewer_new_streams_response rp
;
1627 struct lttng_live_msg_iter
*lttng_live_msg_iter
= session
->lttng_live_msg_iter
;
1628 enum lttng_live_viewer_status viewer_status
;
1629 struct live_viewer_connection
*viewer_connection
= lttng_live_msg_iter
->viewer_connection
;
1630 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1631 uint32_t streams_count
;
1632 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1633 char cmd_buf
[cmd_buf_len
];
1635 if (!session
->new_streams_needed
) {
1636 status
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
1640 BT_COMP_LOGD("Requesting new streams for session: cmd=%s, "
1641 "session-id=%" PRIu64
,
1642 lttng_viewer_command_string(LTTNG_VIEWER_GET_NEW_STREAMS
), session
->id
);
1644 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_NEW_STREAMS
);
1645 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1646 cmd
.cmd_version
= htobe32(0);
1648 memset(&rq
, 0, sizeof(rq
));
1649 rq
.session_id
= htobe64(session
->id
);
1652 * Merge the cmd and connection request to prevent a write-write
1653 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1654 * second write to be performed quickly in presence of Nagle's algorithm.
1656 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1657 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1659 viewer_status
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1660 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1661 viewer_handle_send_status(self_comp
, NULL
, viewer_status
, "get new streams command");
1662 status
= viewer_status_to_live_iterator_status(viewer_status
);
1666 viewer_status
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1667 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1668 viewer_handle_recv_status(self_comp
, NULL
, viewer_status
, "get new streams reply");
1669 status
= viewer_status_to_live_iterator_status(viewer_status
);
1673 streams_count
= be32toh(rp
.streams_count
);
1675 switch (be32toh(rp
.status
)) {
1676 case LTTNG_VIEWER_NEW_STREAMS_OK
:
1677 session
->new_streams_needed
= false;
1679 case LTTNG_VIEWER_NEW_STREAMS_NO_NEW
:
1680 session
->new_streams_needed
= false;
1682 case LTTNG_VIEWER_NEW_STREAMS_HUP
:
1683 session
->new_streams_needed
= false;
1684 session
->closed
= true;
1685 status
= LTTNG_LIVE_ITERATOR_STATUS_END
;
1687 case LTTNG_VIEWER_NEW_STREAMS_ERR
:
1688 BT_COMP_LOGD("Received get_new_streams response: error");
1689 status
= LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
1692 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1693 "Received get_new_streams response: Unknown:"
1695 be32toh(rp
.status
));
1696 status
= LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
1700 viewer_status
= receive_streams(session
, streams_count
, self_msg_iter
);
1701 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1702 viewer_handle_recv_status(self_comp
, NULL
, viewer_status
, "new streams");
1703 status
= viewer_status_to_live_iterator_status(viewer_status
);
1707 status
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
1712 enum lttng_live_viewer_status
live_viewer_connection_create(
1713 bt_self_component
*self_comp
, bt_self_component_class
*self_comp_class
,
1714 bt_logging_level log_level
, const char *url
, bool in_query
,
1715 struct lttng_live_msg_iter
*lttng_live_msg_iter
, struct live_viewer_connection
**viewer
)
1717 enum lttng_live_viewer_status status
;
1719 live_viewer_connection
*viewer_connection
= new live_viewer_connection
;
1721 if (bt_socket_init(log_level
) != 0) {
1722 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
1723 "Failed to init socket");
1724 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1728 viewer_connection
->log_level
= log_level
;
1730 viewer_connection
->self_comp
= self_comp
;
1731 viewer_connection
->self_comp_class
= self_comp_class
;
1733 viewer_connection
->control_sock
= BT_INVALID_SOCKET
;
1734 viewer_connection
->port
= -1;
1735 viewer_connection
->in_query
= in_query
;
1736 viewer_connection
->lttng_live_msg_iter
= lttng_live_msg_iter
;
1737 viewer_connection
->url
= g_string_new(url
);
1738 if (!viewer_connection
->url
) {
1739 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
1740 "Failed to allocate URL buffer");
1741 status
= LTTNG_LIVE_VIEWER_STATUS_ERROR
;
1745 BT_COMP_OR_COMP_CLASS_LOGD(self_comp
, self_comp_class
,
1746 "Establishing connection to url \"%s\"...", url
);
1747 status
= lttng_live_connect_viewer(viewer_connection
);
1749 * Only print error and append cause in case of error. not in case of
1752 if (status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
1753 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
, self_comp_class
,
1754 "Failed to establish connection: "
1758 } else if (status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
1761 BT_COMP_OR_COMP_CLASS_LOGD(self_comp
, self_comp_class
,
1762 "Connection to url \"%s\" is established", url
);
1764 *viewer
= viewer_connection
;
1765 status
= LTTNG_LIVE_VIEWER_STATUS_OK
;
1769 if (viewer_connection
) {
1770 live_viewer_connection_destroy(viewer_connection
);
1776 void live_viewer_connection_destroy(struct live_viewer_connection
*viewer_connection
)
1778 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1779 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
1781 if (!viewer_connection
) {
1785 BT_COMP_OR_COMP_CLASS_LOGD(self_comp
, self_comp_class
,
1786 "Closing connection to relay:"
1788 viewer_connection
->url
->str
);
1790 lttng_live_disconnect_viewer(viewer_connection
);
1792 if (viewer_connection
->url
) {
1793 g_string_free(viewer_connection
->url
, true);
1796 if (viewer_connection
->relay_hostname
) {
1797 g_string_free(viewer_connection
->relay_hostname
, true);
1800 if (viewer_connection
->target_hostname
) {
1801 g_string_free(viewer_connection
->target_hostname
, true);
1804 if (viewer_connection
->session_name
) {
1805 g_string_free(viewer_connection
->session_name
, true);
1808 if (viewer_connection
->proto
) {
1809 g_string_free(viewer_connection
->proto
, true);
1812 delete viewer_connection
;