2 * Copyright 2019 - Francis Deslauriers <francis.deslauriers@efficios.com>
3 * Copyright 2016 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
5 * Permission is hereby granted, free of charge, to any person obtaining a copy
6 * of this software and associated documentation files (the "Software"), to deal
7 * in the Software without restriction, including without limitation the rights
8 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 * copies of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24 #define BT_COMP_LOG_SELF_COMP (viewer_connection->self_comp)
25 #define BT_LOG_OUTPUT_LEVEL (viewer_connection->log_level)
26 #define BT_LOG_TAG "PLUGIN/SRC.CTF.LTTNG-LIVE/VIEWER"
27 #include "logging/comp-logging.h"
34 #include <sys/types.h>
39 #include "compat/socket.h"
40 #include "compat/endian.h"
41 #include "compat/compiler.h"
42 #include "common/common.h"
43 #include <babeltrace2/babeltrace.h>
45 #include "lttng-live.h"
46 #include "viewer-connection.h"
47 #include "lttng-viewer-abi.h"
48 #include "data-stream.h"
52 ssize_t
lttng_live_recv(struct live_viewer_connection
*viewer_connection
,
53 void *buf
, size_t len
)
56 size_t copied
= 0, to_copy
= len
;
57 struct lttng_live_msg_iter
*lttng_live_msg_iter
=
58 viewer_connection
->lttng_live_msg_iter
;
59 BT_SOCKET sock
= viewer_connection
->control_sock
;
62 ret
= bt_socket_recv(sock
, buf
+ copied
, to_copy
, 0);
64 BT_ASSERT(ret
<= to_copy
);
68 if (ret
== BT_SOCKET_ERROR
&& bt_socket_interrupted()) {
69 if (!viewer_connection
->in_query
&&
70 lttng_live_graph_is_canceled(lttng_live_msg_iter
)) {
76 } while (ret
> 0 && to_copy
> 0);
82 /* ret = 0 means orderly shutdown, ret == BT_SOCKET_ERROR is error. */
87 ssize_t
lttng_live_send(struct live_viewer_connection
*viewer_connection
,
88 const void *buf
, size_t len
)
90 struct lttng_live_msg_iter
*lttng_live_msg_iter
=
91 viewer_connection
->lttng_live_msg_iter
;
92 BT_SOCKET sock
= viewer_connection
->control_sock
;
96 ret
= bt_socket_send_nosigpipe(sock
, buf
, len
);
97 if (ret
== BT_SOCKET_ERROR
&& bt_socket_interrupted()) {
98 if (!viewer_connection
->in_query
&&
99 lttng_live_graph_is_canceled(lttng_live_msg_iter
)) {
112 int parse_url(struct live_viewer_connection
*viewer_connection
)
114 char error_buf
[256] = { 0 };
115 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
116 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
117 struct bt_common_lttng_live_url_parts lttng_live_url_parts
= { 0 };
119 const char *path
= viewer_connection
->url
->str
;
125 lttng_live_url_parts
= bt_common_parse_lttng_live_url(path
, error_buf
,
127 if (!lttng_live_url_parts
.proto
) {
128 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
129 self_comp_class
,"Invalid LTTng live URL format: %s",
134 viewer_connection
->relay_hostname
= lttng_live_url_parts
.hostname
;
135 lttng_live_url_parts
.hostname
= NULL
;
137 if (lttng_live_url_parts
.port
>= 0) {
138 viewer_connection
->port
= lttng_live_url_parts
.port
;
140 viewer_connection
->port
= LTTNG_DEFAULT_NETWORK_VIEWER_PORT
;
143 viewer_connection
->target_hostname
= lttng_live_url_parts
.target_hostname
;
144 lttng_live_url_parts
.target_hostname
= NULL
;
146 if (lttng_live_url_parts
.session_name
) {
147 viewer_connection
->session_name
= lttng_live_url_parts
.session_name
;
148 lttng_live_url_parts
.session_name
= NULL
;
151 BT_COMP_LOGI("Connecting to hostname : %s, port : %d, "
152 "target hostname : %s, session name : %s, proto : %s",
153 viewer_connection
->relay_hostname
->str
,
154 viewer_connection
->port
,
155 !viewer_connection
->target_hostname
?
156 "<none>" : viewer_connection
->target_hostname
->str
,
157 !viewer_connection
->session_name
?
158 "<none>" : viewer_connection
->session_name
->str
,
159 lttng_live_url_parts
.proto
->str
);
163 bt_common_destroy_lttng_live_url_parts(<tng_live_url_parts
);
168 int lttng_live_handshake(struct live_viewer_connection
*viewer_connection
)
170 struct lttng_viewer_cmd cmd
;
171 struct lttng_viewer_connect connect
;
172 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
173 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
174 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(connect
);
175 char cmd_buf
[cmd_buf_len
];
179 cmd
.cmd
= htobe32(LTTNG_VIEWER_CONNECT
);
180 cmd
.data_size
= htobe64((uint64_t) sizeof(connect
));
181 cmd
.cmd_version
= htobe32(0);
183 connect
.viewer_session_id
= -1ULL; /* will be set on recv */
184 connect
.major
= htobe32(LTTNG_LIVE_MAJOR
);
185 connect
.minor
= htobe32(LTTNG_LIVE_MINOR
);
186 connect
.type
= htobe32(LTTNG_VIEWER_CLIENT_COMMAND
);
189 * Merge the cmd and connection request to prevent a write-write
190 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
191 * second write to be performed quickly in presence of Nagle's algorithm
193 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
194 memcpy(cmd_buf
+ sizeof(cmd
), &connect
, sizeof(connect
));
195 ret_len
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
196 if (ret_len
== BT_SOCKET_ERROR
) {
197 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
198 self_comp_class
, "Error sending version: %s",
199 bt_socket_errormsg());
203 BT_ASSERT(ret_len
== cmd_buf_len
);
205 ret_len
= lttng_live_recv(viewer_connection
, &connect
, sizeof(connect
));
207 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
208 self_comp_class
, "Remote side has closed connection");
211 if (ret_len
== BT_SOCKET_ERROR
) {
212 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
213 self_comp_class
, "Error receiving version: %s",
214 bt_socket_errormsg());
217 BT_ASSERT(ret_len
== sizeof(connect
));
219 BT_COMP_LOGI("Received viewer session ID : %" PRIu64
,
220 (uint64_t) be64toh(connect
.viewer_session_id
));
221 BT_COMP_LOGI("Relayd version : %u.%u", be32toh(connect
.major
),
222 be32toh(connect
.minor
));
224 if (LTTNG_LIVE_MAJOR
!= be32toh(connect
.major
)) {
225 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
226 self_comp_class
, "Incompatible lttng-relayd protocol");
229 /* Use the smallest protocol version implemented. */
230 if (LTTNG_LIVE_MINOR
> be32toh(connect
.minor
)) {
231 viewer_connection
->minor
= be32toh(connect
.minor
);
233 viewer_connection
->minor
= LTTNG_LIVE_MINOR
;
235 viewer_connection
->major
= LTTNG_LIVE_MAJOR
;
244 int lttng_live_connect_viewer(struct live_viewer_connection
*viewer_connection
)
246 struct hostent
*host
;
247 struct sockaddr_in server_addr
;
248 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
249 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
252 if (parse_url(viewer_connection
)) {
253 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
254 self_comp_class
, "Failed to parse URL");
258 host
= gethostbyname(viewer_connection
->relay_hostname
->str
);
260 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
261 self_comp_class
, "Cannot lookup hostname: hostname=\"%s\"",
262 viewer_connection
->relay_hostname
->str
);
266 if ((viewer_connection
->control_sock
= socket(AF_INET
, SOCK_STREAM
, 0)) == BT_INVALID_SOCKET
) {
267 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
268 self_comp_class
, "Socket creation failed: %s", bt_socket_errormsg());
272 server_addr
.sin_family
= AF_INET
;
273 server_addr
.sin_port
= htons(viewer_connection
->port
);
274 server_addr
.sin_addr
= *((struct in_addr
*) host
->h_addr
);
275 memset(&(server_addr
.sin_zero
), 0, 8);
277 if (connect(viewer_connection
->control_sock
, (struct sockaddr
*) &server_addr
,
278 sizeof(struct sockaddr
)) == BT_SOCKET_ERROR
) {
279 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
280 self_comp_class
, "Connection failed: %s",
281 bt_socket_errormsg());
284 if (lttng_live_handshake(viewer_connection
)) {
285 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
286 self_comp_class
, "Viewer handshake failed");
295 if (viewer_connection
->control_sock
!= BT_INVALID_SOCKET
) {
296 if (bt_socket_close(viewer_connection
->control_sock
) == BT_SOCKET_ERROR
) {
297 BT_COMP_OR_COMP_CLASS_LOGE(self_comp
, self_comp_class
,
298 "Error closing socket: %s", bt_socket_errormsg());
301 viewer_connection
->control_sock
= BT_INVALID_SOCKET
;
306 void lttng_live_disconnect_viewer(
307 struct live_viewer_connection
*viewer_connection
)
309 if (viewer_connection
->control_sock
== BT_INVALID_SOCKET
) {
312 if (bt_socket_close(viewer_connection
->control_sock
) == BT_SOCKET_ERROR
) {
313 BT_COMP_LOGE("Error closing socket: %s",
314 bt_socket_errormsg());
315 viewer_connection
->control_sock
= BT_INVALID_SOCKET
;
320 int list_update_session(bt_value
*results
,
321 const struct lttng_viewer_session
*session
,
322 bool *_found
, struct live_viewer_connection
*viewer_connection
)
324 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
325 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
328 bt_value
*map
= NULL
;
329 bt_value
*hostname
= NULL
;
330 bt_value
*session_name
= NULL
;
331 bt_value
*btval
= NULL
;
334 len
= bt_value_array_get_length(results
);
335 for (i
= 0; i
< len
; i
++) {
336 const char *hostname_str
= NULL
;
337 const char *session_name_str
= NULL
;
339 map
= bt_value_array_borrow_element_by_index(results
, i
);
340 hostname
= bt_value_map_borrow_entry_value(map
, "target-hostname");
342 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
344 "Error borrowing \"target-hostname\" entry.");
348 session_name
= bt_value_map_borrow_entry_value(map
, "session-name");
350 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
352 "Error borrowing \"session-name\" entry.");
356 hostname_str
= bt_value_string_get(hostname
);
357 session_name_str
= bt_value_string_get(session_name
);
359 if (strcmp(session
->hostname
, hostname_str
) == 0
360 && strcmp(session
->session_name
, session_name_str
) == 0) {
362 uint32_t streams
= be32toh(session
->streams
);
363 uint32_t clients
= be32toh(session
->clients
);
367 btval
= bt_value_map_borrow_entry_value(map
, "stream-count");
369 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(
370 self_comp
, self_comp_class
,
371 "Error borrowing \"stream-count\" entry.");
375 val
= bt_value_integer_unsigned_get(btval
);
378 bt_value_integer_unsigned_set(btval
, val
);
380 btval
= bt_value_map_borrow_entry_value(map
, "client-count");
382 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(
383 self_comp
, self_comp_class
,
384 "Error borrowing \"client-count\" entry.");
388 val
= bt_value_integer_unsigned_get(btval
);
390 val
= bt_max_t(int64_t, clients
, val
);
391 bt_value_integer_unsigned_set(btval
, val
);
404 int list_append_session(bt_value
*results
,
406 const struct lttng_viewer_session
*session
,
407 struct live_viewer_connection
*viewer_connection
)
410 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
411 bt_value_map_insert_entry_status insert_status
;
412 bt_value_array_append_element_status append_status
;
413 bt_value
*map
= NULL
;
418 * If the session already exists, add the stream count to it,
419 * and do max of client counts.
421 ret
= list_update_session(results
, session
, &found
, viewer_connection
);
426 map
= bt_value_map_create();
428 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
429 "Error creating map value.");
434 if (base_url
->len
< 1) {
435 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
436 "Error: base_url length smaller than 1.");
444 url
= g_string_new(base_url
->str
);
445 g_string_append(url
, "/host/");
446 g_string_append(url
, session
->hostname
);
447 g_string_append_c(url
, '/');
448 g_string_append(url
, session
->session_name
);
450 insert_status
= bt_value_map_insert_string_entry(map
, "url", url
->str
);
451 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
452 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
453 "Error inserting \"url\" entry.");
459 * key = "target-hostname",
462 insert_status
= bt_value_map_insert_string_entry(map
, "target-hostname",
464 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
465 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
466 "Error inserting \"target-hostname\" entry.");
472 * key = "session-name",
475 insert_status
= bt_value_map_insert_string_entry(map
, "session-name",
476 session
->session_name
);
477 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
478 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
479 "Error inserting \"session-name\" entry.");
489 uint32_t live_timer
= be32toh(session
->live_timer
);
491 insert_status
= bt_value_map_insert_unsigned_integer_entry(
492 map
, "timer-us", live_timer
);
493 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
494 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
495 "Error inserting \"timer-us\" entry.");
502 * key = "stream-count",
506 uint32_t streams
= be32toh(session
->streams
);
508 insert_status
= bt_value_map_insert_unsigned_integer_entry(map
,
509 "stream-count", streams
);
510 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
511 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
512 "Error inserting \"stream-count\" entry.");
519 * key = "client-count",
523 uint32_t clients
= be32toh(session
->clients
);
525 insert_status
= bt_value_map_insert_unsigned_integer_entry(map
,
526 "client-count", clients
);
527 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
528 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
529 "Error inserting \"client-count\" entry.");
535 append_status
= bt_value_array_append_element(results
, map
);
536 if (append_status
!= BT_VALUE_ARRAY_APPEND_ELEMENT_STATUS_OK
) {
537 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
538 "Error appending map to results.");
544 g_string_free(url
, true);
546 BT_VALUE_PUT_REF_AND_RESET(map
);
551 * Data structure returned:
562 * key = "target-hostname",
566 * key = "session-name",
574 * key = "stream-count",
578 * key = "client-count",
587 bt_component_class_query_method_status
live_viewer_connection_list_sessions(
588 struct live_viewer_connection
*viewer_connection
,
589 const bt_value
**user_result
)
591 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
592 bt_component_class_query_method_status status
=
593 BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK
;
594 bt_value
*result
= NULL
;
595 struct lttng_viewer_cmd cmd
;
596 struct lttng_viewer_list_sessions list
;
597 uint32_t i
, sessions_count
;
600 result
= bt_value_array_create();
602 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
603 "Error creating array");
604 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR
;
608 cmd
.cmd
= htobe32(LTTNG_VIEWER_LIST_SESSIONS
);
609 cmd
.data_size
= htobe64((uint64_t) 0);
610 cmd
.cmd_version
= htobe32(0);
612 ret_len
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
613 if (ret_len
== BT_SOCKET_ERROR
) {
614 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
615 "Error sending cmd: %s", bt_socket_errormsg());
616 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
619 BT_ASSERT(ret_len
== sizeof(cmd
));
621 ret_len
= lttng_live_recv(viewer_connection
, &list
, sizeof(list
));
623 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
624 "Remote side has closed connection");
625 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
628 if (ret_len
== BT_SOCKET_ERROR
) {
629 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
630 "Error receiving session list: %s",
631 bt_socket_errormsg());
632 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
635 BT_ASSERT(ret_len
== sizeof(list
));
637 sessions_count
= be32toh(list
.sessions_count
);
638 for (i
= 0; i
< sessions_count
; i
++) {
639 struct lttng_viewer_session lsession
;
641 ret_len
= lttng_live_recv(viewer_connection
, &lsession
,
644 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
645 "Remote side has closed connection");
646 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
649 if (ret_len
== BT_SOCKET_ERROR
) {
650 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
651 "Error receiving session: %s",
652 bt_socket_errormsg());
653 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
656 BT_ASSERT(ret_len
== sizeof(lsession
));
657 lsession
.hostname
[LTTNG_VIEWER_HOST_NAME_MAX
- 1] = '\0';
658 lsession
.session_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
659 if (list_append_session(result
, viewer_connection
->url
,
660 &lsession
, viewer_connection
)) {
661 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
662 "Error appending session");
663 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
668 *user_result
= result
;
671 BT_VALUE_PUT_REF_AND_RESET(result
);
677 int lttng_live_query_session_ids(struct lttng_live_msg_iter
*lttng_live_msg_iter
)
679 struct lttng_viewer_cmd cmd
;
680 struct lttng_viewer_list_sessions list
;
681 struct lttng_viewer_session lsession
;
682 uint32_t i
, sessions_count
;
685 struct live_viewer_connection
*viewer_connection
=
686 lttng_live_msg_iter
->viewer_connection
;
687 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
689 cmd
.cmd
= htobe32(LTTNG_VIEWER_LIST_SESSIONS
);
690 cmd
.data_size
= htobe64((uint64_t) 0);
691 cmd
.cmd_version
= htobe32(0);
693 ret_len
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
694 if (ret_len
== BT_SOCKET_ERROR
) {
695 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Error sending cmd: %s",
696 bt_socket_errormsg());
699 BT_ASSERT(ret_len
== sizeof(cmd
));
701 ret_len
= lttng_live_recv(viewer_connection
, &list
, sizeof(list
));
703 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
704 "Remote side has closed connection");
707 if (ret_len
== BT_SOCKET_ERROR
) {
708 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
709 "Error receiving session list: %s",
710 bt_socket_errormsg());
713 BT_ASSERT(ret_len
== sizeof(list
));
715 sessions_count
= be32toh(list
.sessions_count
);
716 for (i
= 0; i
< sessions_count
; i
++) {
717 ret_len
= lttng_live_recv(viewer_connection
,
718 &lsession
, sizeof(lsession
));
720 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
721 "Remote side has closed connection");
724 if (ret_len
== BT_SOCKET_ERROR
) {
725 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
726 "Error receiving session: %s",
727 bt_socket_errormsg());
730 BT_ASSERT(ret_len
== sizeof(lsession
));
731 lsession
.hostname
[LTTNG_VIEWER_HOST_NAME_MAX
- 1] = '\0';
732 lsession
.session_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
733 session_id
= be64toh(lsession
.id
);
735 BT_COMP_LOGI("Adding session %" PRIu64
" hostname: %s session_name: %s",
736 session_id
, lsession
.hostname
, lsession
.session_name
);
738 if ((strncmp(lsession
.session_name
,
739 viewer_connection
->session_name
->str
,
740 LTTNG_VIEWER_NAME_MAX
) == 0) && (strncmp(lsession
.hostname
,
741 viewer_connection
->target_hostname
->str
,
742 LTTNG_VIEWER_HOST_NAME_MAX
) == 0)) {
743 if (lttng_live_add_session(lttng_live_msg_iter
, session_id
,
745 lsession
.session_name
)) {
746 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
747 "Failed to add live session");
760 int lttng_live_create_viewer_session(
761 struct lttng_live_msg_iter
*lttng_live_msg_iter
)
763 struct lttng_viewer_cmd cmd
;
764 struct lttng_viewer_create_session_response resp
;
766 struct live_viewer_connection
*viewer_connection
=
767 lttng_live_msg_iter
->viewer_connection
;
768 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
770 cmd
.cmd
= htobe32(LTTNG_VIEWER_CREATE_SESSION
);
771 cmd
.data_size
= htobe64((uint64_t) 0);
772 cmd
.cmd_version
= htobe32(0);
774 ret_len
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
775 if (ret_len
== BT_SOCKET_ERROR
) {
776 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Error sending cmd: %s",
777 bt_socket_errormsg());
780 BT_ASSERT(ret_len
== sizeof(cmd
));
782 ret_len
= lttng_live_recv(viewer_connection
, &resp
, sizeof(resp
));
784 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
785 "Remote side has closed connection");
788 if (ret_len
== BT_SOCKET_ERROR
) {
789 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
790 "Error receiving create session reply: %s",
791 bt_socket_errormsg());
794 BT_ASSERT(ret_len
== sizeof(resp
));
796 if (be32toh(resp
.status
) != LTTNG_VIEWER_CREATE_SESSION_OK
) {
797 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
798 "Error creating viewer session");
801 if (lttng_live_query_session_ids(lttng_live_msg_iter
)) {
802 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
803 "Failed to query live viewer session ids");
814 int receive_streams(struct lttng_live_session
*session
,
815 uint32_t stream_count
)
819 struct lttng_live_msg_iter
*lttng_live_msg_iter
=
820 session
->lttng_live_msg_iter
;
821 struct live_viewer_connection
*viewer_connection
=
822 lttng_live_msg_iter
->viewer_connection
;
823 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
825 BT_COMP_LOGI("Getting %" PRIu32
" new streams:", stream_count
);
826 for (i
= 0; i
< stream_count
; i
++) {
827 struct lttng_viewer_stream stream
;
828 struct lttng_live_stream_iterator
*live_stream
;
830 uint64_t ctf_trace_id
;
832 ret_len
= lttng_live_recv(viewer_connection
, &stream
, sizeof(stream
));
834 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
835 "Remote side has closed connection");
838 if (ret_len
== BT_SOCKET_ERROR
) {
839 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
840 "Error receiving stream");
843 BT_ASSERT(ret_len
== sizeof(stream
));
844 stream
.path_name
[LTTNG_VIEWER_PATH_MAX
- 1] = '\0';
845 stream
.channel_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
846 stream_id
= be64toh(stream
.id
);
847 ctf_trace_id
= be64toh(stream
.ctf_trace_id
);
849 if (stream
.metadata_flag
) {
850 BT_COMP_LOGI(" metadata stream %" PRIu64
" : %s/%s",
851 stream_id
, stream
.path_name
, stream
.channel_name
);
852 if (lttng_live_metadata_create_stream(session
,
853 ctf_trace_id
, stream_id
,
855 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
856 "Error creating metadata stream");
860 session
->lazy_stream_msg_init
= true;
862 BT_COMP_LOGI(" stream %" PRIu64
" : %s/%s",
863 stream_id
, stream
.path_name
, stream
.channel_name
);
864 live_stream
= lttng_live_stream_iterator_create(session
,
865 ctf_trace_id
, stream_id
);
867 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
868 "Error creating stream");
880 enum lttng_live_attach_session_status
lttng_live_attach_session(
881 struct lttng_live_session
*session
)
883 struct lttng_viewer_cmd cmd
;
884 enum lttng_live_attach_session_status attach_status
;
885 struct lttng_viewer_attach_session_request rq
;
886 struct lttng_viewer_attach_session_response rp
;
887 struct lttng_live_msg_iter
*lttng_live_msg_iter
=
888 session
->lttng_live_msg_iter
;
889 struct live_viewer_connection
*viewer_connection
=
890 lttng_live_msg_iter
->viewer_connection
;
891 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
892 uint64_t session_id
= session
->id
;
893 uint32_t streams_count
;
894 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
895 char cmd_buf
[cmd_buf_len
];
898 cmd
.cmd
= htobe32(LTTNG_VIEWER_ATTACH_SESSION
);
899 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
900 cmd
.cmd_version
= htobe32(0);
902 memset(&rq
, 0, sizeof(rq
));
903 rq
.session_id
= htobe64(session_id
);
904 // TODO: add cmd line parameter to select seek beginning
905 // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING);
906 rq
.seek
= htobe32(LTTNG_VIEWER_SEEK_LAST
);
909 * Merge the cmd and connection request to prevent a write-write
910 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
911 * second write to be performed quickly in presence of Nagle's algorithm.
913 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
914 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
915 ret_len
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
916 if (ret_len
== BT_SOCKET_ERROR
) {
917 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
918 "Error sending attach request: %s",
919 bt_socket_errormsg());
923 BT_ASSERT(ret_len
== cmd_buf_len
);
924 ret_len
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
926 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
927 "Remote side has closed connection");
930 if (ret_len
== BT_SOCKET_ERROR
) {
931 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
932 "Error receiving attach response: %s",
933 bt_socket_errormsg());
936 BT_ASSERT(ret_len
== sizeof(rp
));
938 streams_count
= be32toh(rp
.streams_count
);
939 switch(be32toh(rp
.status
)) {
940 case LTTNG_VIEWER_ATTACH_OK
:
942 case LTTNG_VIEWER_ATTACH_UNK
:
943 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
944 "Session id %" PRIu64
" is unknown", session_id
);
946 case LTTNG_VIEWER_ATTACH_ALREADY
:
947 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
948 "There is already a viewer attached to this session");
950 case LTTNG_VIEWER_ATTACH_NOT_LIVE
:
951 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Not a live session");
953 case LTTNG_VIEWER_ATTACH_SEEK_ERR
:
954 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Wrong seek parameter");
957 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
958 "Unknown attach return code %u", be32toh(rp
.status
));
962 /* We receive the initial list of streams. */
963 if (receive_streams(session
, streams_count
)) {
964 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Error receiving streams");
968 session
->attached
= true;
969 session
->new_streams_needed
= false;
971 attach_status
= LTTNG_LIVE_ATTACH_SESSION_STATUS_OK
;
975 attach_status
= LTTNG_LIVE_ATTACH_SESSION_STATUS_ERROR
;
978 return attach_status
;
982 int lttng_live_detach_session(struct lttng_live_session
*session
)
984 struct lttng_viewer_cmd cmd
;
985 struct lttng_viewer_detach_session_request rq
;
986 struct lttng_viewer_detach_session_response rp
;
988 struct lttng_live_msg_iter
*lttng_live_msg_iter
=
989 session
->lttng_live_msg_iter
;
990 struct live_viewer_connection
*viewer_connection
=
991 lttng_live_msg_iter
->viewer_connection
;
992 uint64_t session_id
= session
->id
;
993 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
994 char cmd_buf
[cmd_buf_len
];
996 if (!session
->attached
) {
1000 cmd
.cmd
= htobe32(LTTNG_VIEWER_DETACH_SESSION
);
1001 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1002 cmd
.cmd_version
= htobe32(0);
1004 memset(&rq
, 0, sizeof(rq
));
1005 rq
.session_id
= htobe64(session_id
);
1008 * Merge the cmd and connection request to prevent a write-write
1009 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1010 * second write to be performed quickly in presence of Nagle's algorithm.
1012 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1013 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1014 ret_len
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1015 if (ret_len
== BT_SOCKET_ERROR
) {
1016 BT_COMP_LOGE("Error sending detach request: %s",
1017 bt_socket_errormsg());
1021 BT_ASSERT(ret_len
== cmd_buf_len
);
1022 ret_len
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1024 BT_COMP_LOGE("Remote side has closed connection");
1027 if (ret_len
== BT_SOCKET_ERROR
) {
1028 BT_COMP_LOGE("Error receiving detach response: %s",
1029 bt_socket_errormsg());
1032 BT_ASSERT(ret_len
== sizeof(rp
));
1034 switch(be32toh(rp
.status
)) {
1035 case LTTNG_VIEWER_DETACH_SESSION_OK
:
1037 case LTTNG_VIEWER_DETACH_SESSION_UNK
:
1038 BT_COMP_LOGW("Session id %" PRIu64
" is unknown", session_id
);
1040 case LTTNG_VIEWER_DETACH_SESSION_ERR
:
1041 BT_COMP_LOGW("Error detaching session id %" PRIu64
"", session_id
);
1044 BT_COMP_LOGE("Unknown detach return code %u", be32toh(rp
.status
));
1048 session
->attached
= false;
1057 enum lttng_live_get_one_metadata_status
lttng_live_get_one_metadata_packet(
1058 struct lttng_live_trace
*trace
, FILE *fp
, size_t *reply_len
)
1061 enum lttng_live_get_one_metadata_status metadata_status
;
1062 struct lttng_viewer_cmd cmd
;
1063 struct lttng_viewer_get_metadata rq
;
1064 struct lttng_viewer_metadata_packet rp
;
1067 struct lttng_live_session
*session
= trace
->session
;
1068 struct lttng_live_msg_iter
*lttng_live_msg_iter
=
1069 session
->lttng_live_msg_iter
;
1070 struct lttng_live_metadata
*metadata
= trace
->metadata
;
1071 struct live_viewer_connection
*viewer_connection
=
1072 lttng_live_msg_iter
->viewer_connection
;
1073 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1074 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1075 char cmd_buf
[cmd_buf_len
];
1077 rq
.stream_id
= htobe64(metadata
->stream_id
);
1078 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_METADATA
);
1079 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1080 cmd
.cmd_version
= htobe32(0);
1083 * Merge the cmd and connection request to prevent a write-write
1084 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1085 * second write to be performed quickly in presence of Nagle's algorithm.
1087 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1088 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1089 ret_len
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1090 if (ret_len
== BT_SOCKET_ERROR
) {
1091 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1092 "Error sending get_metadata request: %s",
1093 bt_socket_errormsg());
1097 BT_ASSERT(ret_len
== cmd_buf_len
);
1098 ret_len
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1100 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1101 "Remote side has closed connection");
1104 if (ret_len
== BT_SOCKET_ERROR
) {
1105 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1106 "Error receiving get_metadata response: %s",
1107 bt_socket_errormsg());
1110 BT_ASSERT(ret_len
== sizeof(rp
));
1112 switch (be32toh(rp
.status
)) {
1113 case LTTNG_VIEWER_METADATA_OK
:
1114 BT_COMP_LOGD("Received get_metadata response: ok");
1116 case LTTNG_VIEWER_NO_NEW_METADATA
:
1117 BT_COMP_LOGD("Received get_metadata response: no new");
1118 metadata_status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_END
;
1120 case LTTNG_VIEWER_METADATA_ERR
:
1122 * The Relayd cannot find this stream id. Maybe its
1123 * gone already. This can happen in short lived UST app
1124 * in a per-pid session.
1126 BT_COMP_LOGD("Received get_metadata response: error");
1127 metadata_status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_CLOSED
;
1130 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1131 "Received get_metadata response: unknown");
1135 len
= be64toh(rp
.len
);
1136 BT_COMP_LOGD("Writing %" PRIu64
" bytes to metadata", len
);
1138 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1139 "Erroneous response length");
1143 data
= calloc(1, len
);
1145 BT_COMP_LOGE_APPEND_CAUSE_ERRNO(self_comp
,
1146 "Failed to allocate data buffer", ".");
1149 ret_len
= lttng_live_recv(viewer_connection
, data
, len
);
1151 BT_COMP_LOGI("Remote side has closed connection");
1152 goto error_free_data
;
1154 if (ret_len
== BT_SOCKET_ERROR
) {
1155 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1156 "Error receiving trace packet: %s", bt_socket_errormsg());
1157 goto error_free_data
;
1159 BT_ASSERT(ret_len
== len
);
1162 ret_len
= fwrite(data
, 1, len
, fp
);
1163 } while (ret_len
< 0 && errno
== EINTR
);
1165 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1166 "Writing in the metadata file stream");
1167 goto error_free_data
;
1169 BT_ASSERT(ret_len
== len
);
1172 metadata_status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_OK
;
1179 metadata_status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR
;
1182 return metadata_status
;
1186 * Assign the fields from a lttng_viewer_index to a packet_index.
1189 void lttng_index_to_packet_index(struct lttng_viewer_index
*lindex
,
1190 struct packet_index
*pindex
)
1195 pindex
->offset
= be64toh(lindex
->offset
);
1196 pindex
->packet_size
= be64toh(lindex
->packet_size
);
1197 pindex
->content_size
= be64toh(lindex
->content_size
);
1198 pindex
->ts_cycles
.timestamp_begin
= be64toh(lindex
->timestamp_begin
);
1199 pindex
->ts_cycles
.timestamp_end
= be64toh(lindex
->timestamp_end
);
1200 pindex
->events_discarded
= be64toh(lindex
->events_discarded
);
1204 enum lttng_live_iterator_status
lttng_live_get_next_index(
1205 struct lttng_live_msg_iter
*lttng_live_msg_iter
,
1206 struct lttng_live_stream_iterator
*stream
,
1207 struct packet_index
*index
)
1209 struct lttng_viewer_cmd cmd
;
1210 struct lttng_viewer_get_next_index rq
;
1211 struct lttng_viewer_index rp
;
1212 enum lttng_live_iterator_status retstatus
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
1213 struct live_viewer_connection
*viewer_connection
=
1214 lttng_live_msg_iter
->viewer_connection
;
1215 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1216 struct lttng_live_trace
*trace
= stream
->trace
;
1217 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1218 char cmd_buf
[cmd_buf_len
];
1219 uint32_t flags
, status
;
1222 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_NEXT_INDEX
);
1223 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1224 cmd
.cmd_version
= htobe32(0);
1227 memset(&rq
, 0, sizeof(rq
));
1228 rq
.stream_id
= htobe64(stream
->viewer_stream_id
);
1231 * Merge the cmd and connection request to prevent a write-write
1232 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1233 * second write to be performed quickly in presence of Nagle's algorithm.
1235 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1236 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1237 ret_len
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1238 if (ret_len
== BT_SOCKET_ERROR
) {
1239 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1240 "Error sending get_next_index request: %s",
1241 bt_socket_errormsg());
1245 BT_ASSERT(ret_len
== cmd_buf_len
);
1246 ret_len
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1248 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1249 "Remote side has closed connection");
1252 if (ret_len
== BT_SOCKET_ERROR
) {
1253 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1254 "Error receiving get_next_index response: %s",
1255 bt_socket_errormsg());
1258 BT_ASSERT(ret_len
== sizeof(rp
));
1260 flags
= be32toh(rp
.flags
);
1261 status
= be32toh(rp
.status
);
1264 case LTTNG_VIEWER_INDEX_INACTIVE
:
1266 uint64_t ctf_stream_class_id
;
1268 BT_COMP_LOGD("Received get_next_index response: inactive");
1269 memset(index
, 0, sizeof(struct packet_index
));
1270 index
->ts_cycles
.timestamp_end
= be64toh(rp
.timestamp_end
);
1271 stream
->current_inactivity_ts
= index
->ts_cycles
.timestamp_end
;
1272 ctf_stream_class_id
= be64toh(rp
.stream_id
);
1273 if (stream
->ctf_stream_class_id
!= -1ULL) {
1274 BT_ASSERT(stream
->ctf_stream_class_id
==
1275 ctf_stream_class_id
);
1277 stream
->ctf_stream_class_id
= ctf_stream_class_id
;
1279 stream
->state
= LTTNG_LIVE_STREAM_QUIESCENT
;
1282 case LTTNG_VIEWER_INDEX_OK
:
1284 uint64_t ctf_stream_class_id
;
1286 BT_COMP_LOGD("Received get_next_index response: OK");
1287 lttng_index_to_packet_index(&rp
, index
);
1288 ctf_stream_class_id
= be64toh(rp
.stream_id
);
1289 if (stream
->ctf_stream_class_id
!= -1ULL) {
1290 BT_ASSERT(stream
->ctf_stream_class_id
==
1291 ctf_stream_class_id
);
1293 stream
->ctf_stream_class_id
= ctf_stream_class_id
;
1296 stream
->state
= LTTNG_LIVE_STREAM_ACTIVE_DATA
;
1298 if (flags
& LTTNG_VIEWER_FLAG_NEW_METADATA
) {
1299 BT_COMP_LOGD("Received get_next_index response: new metadata needed");
1300 trace
->new_metadata_needed
= true;
1302 if (flags
& LTTNG_VIEWER_FLAG_NEW_STREAM
) {
1303 BT_COMP_LOGD("Received get_next_index response: new streams needed");
1304 lttng_live_need_new_streams(lttng_live_msg_iter
);
1308 case LTTNG_VIEWER_INDEX_RETRY
:
1309 BT_COMP_LOGD("Received get_next_index response: retry");
1310 memset(index
, 0, sizeof(struct packet_index
));
1311 retstatus
= LTTNG_LIVE_ITERATOR_STATUS_AGAIN
;
1312 stream
->state
= LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
;
1314 case LTTNG_VIEWER_INDEX_HUP
:
1315 BT_COMP_LOGD("Received get_next_index response: stream hung up");
1316 memset(index
, 0, sizeof(struct packet_index
));
1317 index
->offset
= EOF
;
1318 retstatus
= LTTNG_LIVE_ITERATOR_STATUS_END
;
1319 stream
->state
= LTTNG_LIVE_STREAM_EOF
;
1320 stream
->has_stream_hung_up
= true;
1322 case LTTNG_VIEWER_INDEX_ERR
:
1323 BT_COMP_LOGD("Received get_next_index response: error");
1324 memset(index
, 0, sizeof(struct packet_index
));
1325 stream
->state
= LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
;
1328 BT_COMP_LOGD("Received get_next_index response: unknown value");
1329 memset(index
, 0, sizeof(struct packet_index
));
1330 stream
->state
= LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
;
1337 if (lttng_live_graph_is_canceled(lttng_live_msg_iter
)) {
1338 retstatus
= LTTNG_LIVE_ITERATOR_STATUS_AGAIN
;
1340 retstatus
= LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
1346 enum ctf_msg_iter_medium_status
lttng_live_get_stream_bytes(
1347 struct lttng_live_msg_iter
*lttng_live_msg_iter
,
1348 struct lttng_live_stream_iterator
*stream
, uint8_t *buf
,
1349 uint64_t offset
, uint64_t req_len
, uint64_t *recv_len
)
1351 enum ctf_msg_iter_medium_status retstatus
= CTF_MSG_ITER_MEDIUM_STATUS_OK
;
1352 struct lttng_viewer_trace_packet rp
;
1353 struct lttng_viewer_cmd cmd
;
1354 struct lttng_viewer_get_packet rq
;
1355 struct live_viewer_connection
*viewer_connection
=
1356 lttng_live_msg_iter
->viewer_connection
;
1357 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1358 struct lttng_live_trace
*trace
= stream
->trace
;
1359 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1360 char cmd_buf
[cmd_buf_len
];
1361 uint32_t flags
, status
;
1364 BT_COMP_LOGD("lttng_live_get_stream_bytes: offset=%" PRIu64
", req_len=%" PRIu64
,
1366 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_PACKET
);
1367 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1368 cmd
.cmd_version
= htobe32(0);
1370 memset(&rq
, 0, sizeof(rq
));
1371 rq
.stream_id
= htobe64(stream
->viewer_stream_id
);
1372 rq
.offset
= htobe64(offset
);
1373 rq
.len
= htobe32(req_len
);
1376 * Merge the cmd and connection request to prevent a write-write
1377 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1378 * second write to be performed quickly in presence of Nagle's algorithm.
1380 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1381 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1382 ret_len
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1383 if (ret_len
== BT_SOCKET_ERROR
) {
1384 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1385 "Error sending get_data_packet request: %s",
1386 bt_socket_errormsg());
1390 BT_ASSERT(ret_len
== cmd_buf_len
);
1391 ret_len
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1393 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1394 "Remote side has closed connection");
1397 if (ret_len
== BT_SOCKET_ERROR
) {
1398 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1399 "Socket error receiving get_data response: %s",
1400 bt_socket_errormsg());
1403 if (ret_len
!= sizeof(rp
)) {
1404 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "get_data_packet: "
1405 "expected %zu, received %zd", sizeof(rp
), ret_len
);
1409 flags
= be32toh(rp
.flags
);
1410 status
= be32toh(rp
.status
);
1413 case LTTNG_VIEWER_GET_PACKET_OK
:
1414 req_len
= be32toh(rp
.len
);
1415 BT_COMP_LOGD("Received get_data_packet response: Ok, "
1416 "packet size : %" PRIu64
"", req_len
);
1418 case LTTNG_VIEWER_GET_PACKET_RETRY
:
1419 /* Unimplemented by relay daemon */
1420 BT_COMP_LOGD("Received get_data_packet response: retry");
1421 retstatus
= CTF_MSG_ITER_MEDIUM_STATUS_AGAIN
;
1423 case LTTNG_VIEWER_GET_PACKET_ERR
:
1424 if (flags
& LTTNG_VIEWER_FLAG_NEW_METADATA
) {
1425 BT_COMP_LOGD("get_data_packet: new metadata needed, try again later");
1426 trace
->new_metadata_needed
= true;
1428 if (flags
& LTTNG_VIEWER_FLAG_NEW_STREAM
) {
1429 BT_COMP_LOGD("get_data_packet: new streams needed, try again later");
1430 lttng_live_need_new_streams(lttng_live_msg_iter
);
1432 if (flags
& (LTTNG_VIEWER_FLAG_NEW_METADATA
1433 | LTTNG_VIEWER_FLAG_NEW_STREAM
)) {
1434 retstatus
= CTF_MSG_ITER_MEDIUM_STATUS_AGAIN
;
1437 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1438 "Received get_data_packet response: error");
1440 case LTTNG_VIEWER_GET_PACKET_EOF
:
1441 retstatus
= CTF_MSG_ITER_MEDIUM_STATUS_EOF
;
1444 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1445 "Received get_data_packet response: unknown");
1453 ret_len
= lttng_live_recv(viewer_connection
, buf
, req_len
);
1455 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1456 "Remote side has closed connection");
1459 if (ret_len
== BT_SOCKET_ERROR
) {
1460 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1461 "Error receiving trace packet: %s",
1462 bt_socket_errormsg());
1465 BT_ASSERT(ret_len
== req_len
);
1466 *recv_len
= ret_len
;
1471 if (lttng_live_graph_is_canceled(lttng_live_msg_iter
)) {
1472 retstatus
= CTF_MSG_ITER_MEDIUM_STATUS_AGAIN
;
1474 retstatus
= CTF_MSG_ITER_MEDIUM_STATUS_ERROR
;
1480 * Request new streams for a session.
1483 enum lttng_live_iterator_status
lttng_live_get_new_streams(
1484 struct lttng_live_session
*session
)
1486 enum lttng_live_iterator_status status
=
1487 LTTNG_LIVE_ITERATOR_STATUS_OK
;
1488 struct lttng_viewer_cmd cmd
;
1489 struct lttng_viewer_new_streams_request rq
;
1490 struct lttng_viewer_new_streams_response rp
;
1491 struct lttng_live_msg_iter
*lttng_live_msg_iter
=
1492 session
->lttng_live_msg_iter
;
1493 struct live_viewer_connection
*viewer_connection
=
1494 lttng_live_msg_iter
->viewer_connection
;
1495 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1496 uint32_t streams_count
;
1497 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1498 char cmd_buf
[cmd_buf_len
];
1501 if (!session
->new_streams_needed
) {
1502 return LTTNG_LIVE_ITERATOR_STATUS_OK
;
1505 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_NEW_STREAMS
);
1506 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1507 cmd
.cmd_version
= htobe32(0);
1509 memset(&rq
, 0, sizeof(rq
));
1510 rq
.session_id
= htobe64(session
->id
);
1513 * Merge the cmd and connection request to prevent a write-write
1514 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1515 * second write to be performed quickly in presence of Nagle's algorithm.
1517 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1518 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1519 ret_len
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1520 if (ret_len
== BT_SOCKET_ERROR
) {
1521 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1522 "Error sending get_new_streams request: %s",
1523 bt_socket_errormsg());
1527 BT_ASSERT(ret_len
== cmd_buf_len
);
1528 ret_len
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1530 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1531 "Remote side has closed connection");
1534 if (ret_len
== BT_SOCKET_ERROR
) {
1535 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1536 "Error receiving get_new_streams response");
1539 BT_ASSERT(ret_len
== sizeof(rp
));
1541 streams_count
= be32toh(rp
.streams_count
);
1543 switch(be32toh(rp
.status
)) {
1544 case LTTNG_VIEWER_NEW_STREAMS_OK
:
1545 session
->new_streams_needed
= false;
1547 case LTTNG_VIEWER_NEW_STREAMS_NO_NEW
:
1548 session
->new_streams_needed
= false;
1550 case LTTNG_VIEWER_NEW_STREAMS_HUP
:
1551 session
->new_streams_needed
= false;
1552 session
->closed
= true;
1553 status
= LTTNG_LIVE_ITERATOR_STATUS_END
;
1555 case LTTNG_VIEWER_NEW_STREAMS_ERR
:
1556 BT_COMP_LOGD("Received get_new_streams response: error");
1559 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1560 "Received get_new_streams response: Unknown:"
1561 "return code %u", be32toh(rp
.status
));
1565 if (receive_streams(session
, streams_count
)) {
1566 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Error receiving streams");
1573 if (lttng_live_graph_is_canceled(lttng_live_msg_iter
)) {
1574 status
= LTTNG_LIVE_ITERATOR_STATUS_AGAIN
;
1576 status
= LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
1577 BT_COMP_LOGE("Error receiving streams.");
1583 struct live_viewer_connection
*live_viewer_connection_create(
1584 const char *url
, bool in_query
,
1585 struct lttng_live_msg_iter
*lttng_live_msg_iter
,
1586 bt_self_component
*self_comp
,
1587 bt_self_component_class
*self_comp_class
,
1588 bt_logging_level log_level
)
1590 struct live_viewer_connection
*viewer_connection
;
1592 viewer_connection
= g_new0(struct live_viewer_connection
, 1);
1594 if (bt_socket_init(log_level
) != 0) {
1595 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
1596 self_comp_class
, "Failed to init socket");
1600 viewer_connection
->log_level
= log_level
;
1602 viewer_connection
->self_comp
= self_comp
;
1603 viewer_connection
->self_comp_class
= self_comp_class
;
1605 viewer_connection
->control_sock
= BT_INVALID_SOCKET
;
1606 viewer_connection
->port
= -1;
1607 viewer_connection
->in_query
= in_query
;
1608 viewer_connection
->lttng_live_msg_iter
= lttng_live_msg_iter
;
1609 viewer_connection
->url
= g_string_new(url
);
1610 if (!viewer_connection
->url
) {
1611 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
1612 self_comp_class
, "Failed to allocate URL buffer");
1616 BT_COMP_LOGI("Establishing connection to url \"%s\"...", url
);
1617 if (lttng_live_connect_viewer(viewer_connection
)) {
1618 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
1619 self_comp_class
, "Failed to establish connection: "
1623 BT_COMP_LOGI("Connection to url \"%s\" is established", url
);
1624 return viewer_connection
;
1627 if (viewer_connection
) {
1628 live_viewer_connection_destroy(viewer_connection
);
1635 void live_viewer_connection_destroy(
1636 struct live_viewer_connection
*viewer_connection
)
1638 BT_COMP_LOGI("Closing connection to url \"%s\"", viewer_connection
->url
->str
);
1640 if (!viewer_connection
) {
1644 lttng_live_disconnect_viewer(viewer_connection
);
1646 if (viewer_connection
->url
) {
1647 g_string_free(viewer_connection
->url
, true);
1650 if (viewer_connection
->relay_hostname
) {
1651 g_string_free(viewer_connection
->relay_hostname
, true);
1654 if (viewer_connection
->target_hostname
) {
1655 g_string_free(viewer_connection
->target_hostname
, true);
1658 if (viewer_connection
->session_name
) {
1659 g_string_free(viewer_connection
->session_name
, true);
1662 g_free(viewer_connection
);