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"
36 #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 void connection_release(bt_object
*obj
)
322 struct live_viewer_connection
*conn
=
323 container_of(obj
, struct live_viewer_connection
, obj
);
325 live_viewer_connection_destroy(conn
);
329 int list_update_session(bt_value
*results
,
330 const struct lttng_viewer_session
*session
,
331 bool *_found
, struct live_viewer_connection
*viewer_connection
)
333 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
334 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
337 bt_value
*map
= NULL
;
338 bt_value
*hostname
= NULL
;
339 bt_value
*session_name
= NULL
;
340 bt_value
*btval
= NULL
;
343 len
= bt_value_array_get_length(results
);
344 for (i
= 0; i
< len
; i
++) {
345 const char *hostname_str
= NULL
;
346 const char *session_name_str
= NULL
;
348 map
= bt_value_array_borrow_element_by_index(results
, i
);
349 hostname
= bt_value_map_borrow_entry_value(map
, "target-hostname");
351 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
353 "Error borrowing \"target-hostname\" entry.");
357 session_name
= bt_value_map_borrow_entry_value(map
, "session-name");
359 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
361 "Error borrowing \"session-name\" entry.");
365 hostname_str
= bt_value_string_get(hostname
);
366 session_name_str
= bt_value_string_get(session_name
);
368 if (strcmp(session
->hostname
, hostname_str
) == 0
369 && strcmp(session
->session_name
, session_name_str
) == 0) {
371 uint32_t streams
= be32toh(session
->streams
);
372 uint32_t clients
= be32toh(session
->clients
);
376 btval
= bt_value_map_borrow_entry_value(map
, "stream-count");
378 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(
379 self_comp
, self_comp_class
,
380 "Error borrowing \"stream-count\" entry.");
384 val
= bt_value_integer_unsigned_get(btval
);
387 bt_value_integer_unsigned_set(btval
, val
);
389 btval
= bt_value_map_borrow_entry_value(map
, "client-count");
391 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(
392 self_comp
, self_comp_class
,
393 "Error borrowing \"client-count\" entry.");
397 val
= bt_value_integer_unsigned_get(btval
);
399 val
= bt_max_t(int64_t, clients
, val
);
400 bt_value_integer_unsigned_set(btval
, val
);
413 int list_append_session(bt_value
*results
,
415 const struct lttng_viewer_session
*session
,
416 struct live_viewer_connection
*viewer_connection
)
419 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
420 bt_value_map_insert_entry_status insert_status
;
421 bt_value_array_append_element_status append_status
;
422 bt_value
*map
= NULL
;
427 * If the session already exists, add the stream count to it,
428 * and do max of client counts.
430 ret
= list_update_session(results
, session
, &found
, viewer_connection
);
435 map
= bt_value_map_create();
437 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
438 "Error creating map value.");
443 if (base_url
->len
< 1) {
444 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
445 "Error: base_url length smaller than 1.");
453 url
= g_string_new(base_url
->str
);
454 g_string_append(url
, "/host/");
455 g_string_append(url
, session
->hostname
);
456 g_string_append_c(url
, '/');
457 g_string_append(url
, session
->session_name
);
459 insert_status
= bt_value_map_insert_string_entry(map
, "url", url
->str
);
460 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
461 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
462 "Error inserting \"url\" entry.");
468 * key = "target-hostname",
471 insert_status
= bt_value_map_insert_string_entry(map
, "target-hostname",
473 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
474 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
475 "Error inserting \"target-hostname\" entry.");
481 * key = "session-name",
484 insert_status
= bt_value_map_insert_string_entry(map
, "session-name",
485 session
->session_name
);
486 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
487 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
488 "Error inserting \"session-name\" entry.");
498 uint32_t live_timer
= be32toh(session
->live_timer
);
500 insert_status
= bt_value_map_insert_unsigned_integer_entry(
501 map
, "timer-us", live_timer
);
502 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
503 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
504 "Error inserting \"timer-us\" entry.");
511 * key = "stream-count",
515 uint32_t streams
= be32toh(session
->streams
);
517 insert_status
= bt_value_map_insert_unsigned_integer_entry(map
,
518 "stream-count", streams
);
519 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
520 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
521 "Error inserting \"stream-count\" entry.");
528 * key = "client-count",
532 uint32_t clients
= be32toh(session
->clients
);
534 insert_status
= bt_value_map_insert_unsigned_integer_entry(map
,
535 "client-count", clients
);
536 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
537 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
538 "Error inserting \"client-count\" entry.");
544 append_status
= bt_value_array_append_element(results
, map
);
545 if (append_status
!= BT_VALUE_ARRAY_APPEND_ELEMENT_STATUS_OK
) {
546 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
547 "Error appending map to results.");
553 g_string_free(url
, true);
555 BT_VALUE_PUT_REF_AND_RESET(map
);
560 * Data structure returned:
571 * key = "target-hostname",
575 * key = "session-name",
583 * key = "stream-count",
587 * key = "client-count",
596 bt_component_class_query_method_status
live_viewer_connection_list_sessions(
597 struct live_viewer_connection
*viewer_connection
,
598 const bt_value
**user_result
)
600 bt_self_component_class
*self_comp_class
= viewer_connection
->self_comp_class
;
601 bt_component_class_query_method_status status
=
602 BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK
;
603 bt_value
*result
= NULL
;
604 struct lttng_viewer_cmd cmd
;
605 struct lttng_viewer_list_sessions list
;
606 uint32_t i
, sessions_count
;
609 result
= bt_value_array_create();
611 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
612 "Error creating array");
613 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR
;
617 cmd
.cmd
= htobe32(LTTNG_VIEWER_LIST_SESSIONS
);
618 cmd
.data_size
= htobe64((uint64_t) 0);
619 cmd
.cmd_version
= htobe32(0);
621 ret_len
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
622 if (ret_len
== BT_SOCKET_ERROR
) {
623 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
624 "Error sending cmd: %s", bt_socket_errormsg());
625 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
628 BT_ASSERT(ret_len
== sizeof(cmd
));
630 ret_len
= lttng_live_recv(viewer_connection
, &list
, sizeof(list
));
632 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
633 "Remote side has closed connection");
634 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
637 if (ret_len
== BT_SOCKET_ERROR
) {
638 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
639 "Error receiving session list: %s",
640 bt_socket_errormsg());
641 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
644 BT_ASSERT(ret_len
== sizeof(list
));
646 sessions_count
= be32toh(list
.sessions_count
);
647 for (i
= 0; i
< sessions_count
; i
++) {
648 struct lttng_viewer_session lsession
;
650 ret_len
= lttng_live_recv(viewer_connection
, &lsession
,
653 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
654 "Remote side has closed connection");
655 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
658 if (ret_len
== BT_SOCKET_ERROR
) {
659 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
660 "Error receiving session: %s",
661 bt_socket_errormsg());
662 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
665 BT_ASSERT(ret_len
== sizeof(lsession
));
666 lsession
.hostname
[LTTNG_VIEWER_HOST_NAME_MAX
- 1] = '\0';
667 lsession
.session_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
668 if (list_append_session(result
, viewer_connection
->url
,
669 &lsession
, viewer_connection
)) {
670 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
671 "Error appending session");
672 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
677 *user_result
= result
;
680 BT_VALUE_PUT_REF_AND_RESET(result
);
686 int lttng_live_query_session_ids(struct lttng_live_msg_iter
*lttng_live_msg_iter
)
688 struct lttng_viewer_cmd cmd
;
689 struct lttng_viewer_list_sessions list
;
690 struct lttng_viewer_session lsession
;
691 uint32_t i
, sessions_count
;
694 struct live_viewer_connection
*viewer_connection
=
695 lttng_live_msg_iter
->viewer_connection
;
696 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
698 cmd
.cmd
= htobe32(LTTNG_VIEWER_LIST_SESSIONS
);
699 cmd
.data_size
= htobe64((uint64_t) 0);
700 cmd
.cmd_version
= htobe32(0);
702 ret_len
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
703 if (ret_len
== BT_SOCKET_ERROR
) {
704 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Error sending cmd: %s",
705 bt_socket_errormsg());
708 BT_ASSERT(ret_len
== sizeof(cmd
));
710 ret_len
= lttng_live_recv(viewer_connection
, &list
, sizeof(list
));
712 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
713 "Remote side has closed connection");
716 if (ret_len
== BT_SOCKET_ERROR
) {
717 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
718 "Error receiving session list: %s",
719 bt_socket_errormsg());
722 BT_ASSERT(ret_len
== sizeof(list
));
724 sessions_count
= be32toh(list
.sessions_count
);
725 for (i
= 0; i
< sessions_count
; i
++) {
726 ret_len
= lttng_live_recv(viewer_connection
,
727 &lsession
, sizeof(lsession
));
729 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
730 "Remote side has closed connection");
733 if (ret_len
== BT_SOCKET_ERROR
) {
734 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
735 "Error receiving session: %s",
736 bt_socket_errormsg());
739 BT_ASSERT(ret_len
== sizeof(lsession
));
740 lsession
.hostname
[LTTNG_VIEWER_HOST_NAME_MAX
- 1] = '\0';
741 lsession
.session_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
742 session_id
= be64toh(lsession
.id
);
744 BT_COMP_LOGI("Adding session %" PRIu64
" hostname: %s session_name: %s",
745 session_id
, lsession
.hostname
, lsession
.session_name
);
747 if ((strncmp(lsession
.session_name
,
748 viewer_connection
->session_name
->str
,
749 LTTNG_VIEWER_NAME_MAX
) == 0) && (strncmp(lsession
.hostname
,
750 viewer_connection
->target_hostname
->str
,
751 LTTNG_VIEWER_HOST_NAME_MAX
) == 0)) {
752 if (lttng_live_add_session(lttng_live_msg_iter
, session_id
,
754 lsession
.session_name
)) {
755 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
756 "Failed to add live session");
769 int lttng_live_create_viewer_session(
770 struct lttng_live_msg_iter
*lttng_live_msg_iter
)
772 struct lttng_viewer_cmd cmd
;
773 struct lttng_viewer_create_session_response resp
;
775 struct live_viewer_connection
*viewer_connection
=
776 lttng_live_msg_iter
->viewer_connection
;
777 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
779 cmd
.cmd
= htobe32(LTTNG_VIEWER_CREATE_SESSION
);
780 cmd
.data_size
= htobe64((uint64_t) 0);
781 cmd
.cmd_version
= htobe32(0);
783 ret_len
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
784 if (ret_len
== BT_SOCKET_ERROR
) {
785 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Error sending cmd: %s",
786 bt_socket_errormsg());
789 BT_ASSERT(ret_len
== sizeof(cmd
));
791 ret_len
= lttng_live_recv(viewer_connection
, &resp
, sizeof(resp
));
793 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
794 "Remote side has closed connection");
797 if (ret_len
== BT_SOCKET_ERROR
) {
798 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
799 "Error receiving create session reply: %s",
800 bt_socket_errormsg());
803 BT_ASSERT(ret_len
== sizeof(resp
));
805 if (be32toh(resp
.status
) != LTTNG_VIEWER_CREATE_SESSION_OK
) {
806 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
807 "Error creating viewer session");
810 if (lttng_live_query_session_ids(lttng_live_msg_iter
)) {
811 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
812 "Failed to query live viewer session ids");
823 int receive_streams(struct lttng_live_session
*session
,
824 uint32_t stream_count
)
828 struct lttng_live_msg_iter
*lttng_live_msg_iter
=
829 session
->lttng_live_msg_iter
;
830 struct live_viewer_connection
*viewer_connection
=
831 lttng_live_msg_iter
->viewer_connection
;
832 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
834 BT_COMP_LOGI("Getting %" PRIu32
" new streams:", stream_count
);
835 for (i
= 0; i
< stream_count
; i
++) {
836 struct lttng_viewer_stream stream
;
837 struct lttng_live_stream_iterator
*live_stream
;
839 uint64_t ctf_trace_id
;
841 ret_len
= lttng_live_recv(viewer_connection
, &stream
, sizeof(stream
));
843 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
844 "Remote side has closed connection");
847 if (ret_len
== BT_SOCKET_ERROR
) {
848 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
849 "Error receiving stream");
852 BT_ASSERT(ret_len
== sizeof(stream
));
853 stream
.path_name
[LTTNG_VIEWER_PATH_MAX
- 1] = '\0';
854 stream
.channel_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
855 stream_id
= be64toh(stream
.id
);
856 ctf_trace_id
= be64toh(stream
.ctf_trace_id
);
858 if (stream
.metadata_flag
) {
859 BT_COMP_LOGI(" metadata stream %" PRIu64
" : %s/%s",
860 stream_id
, stream
.path_name
, stream
.channel_name
);
861 if (lttng_live_metadata_create_stream(session
,
862 ctf_trace_id
, stream_id
,
864 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
865 "Error creating metadata stream");
869 session
->lazy_stream_msg_init
= true;
871 BT_COMP_LOGI(" stream %" PRIu64
" : %s/%s",
872 stream_id
, stream
.path_name
, stream
.channel_name
);
873 live_stream
= lttng_live_stream_iterator_create(session
,
874 ctf_trace_id
, stream_id
);
876 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
877 "Error creating stream");
889 enum lttng_live_attach_session_status
lttng_live_attach_session(
890 struct lttng_live_session
*session
)
892 struct lttng_viewer_cmd cmd
;
893 enum lttng_live_attach_session_status attach_status
;
894 struct lttng_viewer_attach_session_request rq
;
895 struct lttng_viewer_attach_session_response rp
;
896 struct lttng_live_msg_iter
*lttng_live_msg_iter
=
897 session
->lttng_live_msg_iter
;
898 struct live_viewer_connection
*viewer_connection
=
899 lttng_live_msg_iter
->viewer_connection
;
900 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
901 uint64_t session_id
= session
->id
;
902 uint32_t streams_count
;
903 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
904 char cmd_buf
[cmd_buf_len
];
907 cmd
.cmd
= htobe32(LTTNG_VIEWER_ATTACH_SESSION
);
908 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
909 cmd
.cmd_version
= htobe32(0);
911 memset(&rq
, 0, sizeof(rq
));
912 rq
.session_id
= htobe64(session_id
);
913 // TODO: add cmd line parameter to select seek beginning
914 // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING);
915 rq
.seek
= htobe32(LTTNG_VIEWER_SEEK_LAST
);
918 * Merge the cmd and connection request to prevent a write-write
919 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
920 * second write to be performed quickly in presence of Nagle's algorithm.
922 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
923 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
924 ret_len
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
925 if (ret_len
== BT_SOCKET_ERROR
) {
926 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
927 "Error sending attach request: %s",
928 bt_socket_errormsg());
932 BT_ASSERT(ret_len
== cmd_buf_len
);
933 ret_len
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
935 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
936 "Remote side has closed connection");
939 if (ret_len
== BT_SOCKET_ERROR
) {
940 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
941 "Error receiving attach response: %s",
942 bt_socket_errormsg());
945 BT_ASSERT(ret_len
== sizeof(rp
));
947 streams_count
= be32toh(rp
.streams_count
);
948 switch(be32toh(rp
.status
)) {
949 case LTTNG_VIEWER_ATTACH_OK
:
951 case LTTNG_VIEWER_ATTACH_UNK
:
952 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
953 "Session id %" PRIu64
" is unknown", session_id
);
955 case LTTNG_VIEWER_ATTACH_ALREADY
:
956 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
957 "There is already a viewer attached to this session");
959 case LTTNG_VIEWER_ATTACH_NOT_LIVE
:
960 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Not a live session");
962 case LTTNG_VIEWER_ATTACH_SEEK_ERR
:
963 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Wrong seek parameter");
966 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
967 "Unknown attach return code %u", be32toh(rp
.status
));
971 /* We receive the initial list of streams. */
972 if (receive_streams(session
, streams_count
)) {
973 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Error receiving streams");
977 session
->attached
= true;
978 session
->new_streams_needed
= false;
980 attach_status
= LTTNG_LIVE_ATTACH_SESSION_STATUS_OK
;
984 attach_status
= LTTNG_LIVE_ATTACH_SESSION_STATUS_ERROR
;
987 return attach_status
;
991 int lttng_live_detach_session(struct lttng_live_session
*session
)
993 struct lttng_viewer_cmd cmd
;
994 struct lttng_viewer_detach_session_request rq
;
995 struct lttng_viewer_detach_session_response rp
;
997 struct lttng_live_msg_iter
*lttng_live_msg_iter
=
998 session
->lttng_live_msg_iter
;
999 struct live_viewer_connection
*viewer_connection
=
1000 lttng_live_msg_iter
->viewer_connection
;
1001 uint64_t session_id
= session
->id
;
1002 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1003 char cmd_buf
[cmd_buf_len
];
1005 if (!session
->attached
) {
1009 cmd
.cmd
= htobe32(LTTNG_VIEWER_DETACH_SESSION
);
1010 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1011 cmd
.cmd_version
= htobe32(0);
1013 memset(&rq
, 0, sizeof(rq
));
1014 rq
.session_id
= htobe64(session_id
);
1017 * Merge the cmd and connection request to prevent a write-write
1018 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1019 * second write to be performed quickly in presence of Nagle's algorithm.
1021 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1022 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1023 ret_len
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1024 if (ret_len
== BT_SOCKET_ERROR
) {
1025 BT_COMP_LOGE("Error sending detach request: %s",
1026 bt_socket_errormsg());
1030 BT_ASSERT(ret_len
== cmd_buf_len
);
1031 ret_len
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1033 BT_COMP_LOGE("Remote side has closed connection");
1036 if (ret_len
== BT_SOCKET_ERROR
) {
1037 BT_COMP_LOGE("Error receiving detach response: %s",
1038 bt_socket_errormsg());
1041 BT_ASSERT(ret_len
== sizeof(rp
));
1043 switch(be32toh(rp
.status
)) {
1044 case LTTNG_VIEWER_DETACH_SESSION_OK
:
1046 case LTTNG_VIEWER_DETACH_SESSION_UNK
:
1047 BT_COMP_LOGW("Session id %" PRIu64
" is unknown", session_id
);
1049 case LTTNG_VIEWER_DETACH_SESSION_ERR
:
1050 BT_COMP_LOGW("Error detaching session id %" PRIu64
"", session_id
);
1053 BT_COMP_LOGE("Unknown detach return code %u", be32toh(rp
.status
));
1057 session
->attached
= false;
1066 enum lttng_live_get_one_metadata_status
lttng_live_get_one_metadata_packet(
1067 struct lttng_live_trace
*trace
, FILE *fp
, size_t *reply_len
)
1070 enum lttng_live_get_one_metadata_status metadata_status
;
1071 struct lttng_viewer_cmd cmd
;
1072 struct lttng_viewer_get_metadata rq
;
1073 struct lttng_viewer_metadata_packet rp
;
1076 struct lttng_live_session
*session
= trace
->session
;
1077 struct lttng_live_msg_iter
*lttng_live_msg_iter
=
1078 session
->lttng_live_msg_iter
;
1079 struct lttng_live_metadata
*metadata
= trace
->metadata
;
1080 struct live_viewer_connection
*viewer_connection
=
1081 lttng_live_msg_iter
->viewer_connection
;
1082 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1083 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1084 char cmd_buf
[cmd_buf_len
];
1086 rq
.stream_id
= htobe64(metadata
->stream_id
);
1087 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_METADATA
);
1088 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1089 cmd
.cmd_version
= htobe32(0);
1092 * Merge the cmd and connection request to prevent a write-write
1093 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1094 * second write to be performed quickly in presence of Nagle's algorithm.
1096 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1097 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1098 ret_len
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1099 if (ret_len
== BT_SOCKET_ERROR
) {
1100 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1101 "Error sending get_metadata request: %s",
1102 bt_socket_errormsg());
1106 BT_ASSERT(ret_len
== cmd_buf_len
);
1107 ret_len
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1109 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1110 "Remote side has closed connection");
1113 if (ret_len
== BT_SOCKET_ERROR
) {
1114 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1115 "Error receiving get_metadata response: %s",
1116 bt_socket_errormsg());
1119 BT_ASSERT(ret_len
== sizeof(rp
));
1121 switch (be32toh(rp
.status
)) {
1122 case LTTNG_VIEWER_METADATA_OK
:
1123 BT_COMP_LOGD("Received get_metadata response: ok");
1125 case LTTNG_VIEWER_NO_NEW_METADATA
:
1126 BT_COMP_LOGD("Received get_metadata response: no new");
1127 metadata_status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_END
;
1129 case LTTNG_VIEWER_METADATA_ERR
:
1131 * The Relayd cannot find this stream id. Maybe its
1132 * gone already. This can happen in short lived UST app
1133 * in a per-pid session.
1135 BT_COMP_LOGD("Received get_metadata response: error");
1136 metadata_status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_CLOSED
;
1139 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1140 "Received get_metadata response: unknown");
1144 len
= be64toh(rp
.len
);
1145 BT_COMP_LOGD("Writing %" PRIu64
" bytes to metadata", len
);
1147 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1148 "Erroneous response length");
1152 data
= calloc(1, len
);
1154 BT_COMP_LOGE_APPEND_CAUSE_ERRNO(self_comp
,
1155 "Failed to allocate data buffer", ".");
1158 ret_len
= lttng_live_recv(viewer_connection
, data
, len
);
1160 BT_COMP_LOGI("Remote side has closed connection");
1161 goto error_free_data
;
1163 if (ret_len
== BT_SOCKET_ERROR
) {
1164 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1165 "Error receiving trace packet: %s", bt_socket_errormsg());
1166 goto error_free_data
;
1168 BT_ASSERT(ret_len
== len
);
1171 ret_len
= fwrite(data
, 1, len
, fp
);
1172 } while (ret_len
< 0 && errno
== EINTR
);
1174 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1175 "Writing in the metadata file stream");
1176 goto error_free_data
;
1178 BT_ASSERT(ret_len
== len
);
1181 metadata_status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_OK
;
1188 metadata_status
= LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR
;
1191 return metadata_status
;
1195 * Assign the fields from a lttng_viewer_index to a packet_index.
1198 void lttng_index_to_packet_index(struct lttng_viewer_index
*lindex
,
1199 struct packet_index
*pindex
)
1204 pindex
->offset
= be64toh(lindex
->offset
);
1205 pindex
->packet_size
= be64toh(lindex
->packet_size
);
1206 pindex
->content_size
= be64toh(lindex
->content_size
);
1207 pindex
->ts_cycles
.timestamp_begin
= be64toh(lindex
->timestamp_begin
);
1208 pindex
->ts_cycles
.timestamp_end
= be64toh(lindex
->timestamp_end
);
1209 pindex
->events_discarded
= be64toh(lindex
->events_discarded
);
1213 enum lttng_live_iterator_status
lttng_live_get_next_index(
1214 struct lttng_live_msg_iter
*lttng_live_msg_iter
,
1215 struct lttng_live_stream_iterator
*stream
,
1216 struct packet_index
*index
)
1218 struct lttng_viewer_cmd cmd
;
1219 struct lttng_viewer_get_next_index rq
;
1220 struct lttng_viewer_index rp
;
1221 enum lttng_live_iterator_status retstatus
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
1222 struct live_viewer_connection
*viewer_connection
=
1223 lttng_live_msg_iter
->viewer_connection
;
1224 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1225 struct lttng_live_trace
*trace
= stream
->trace
;
1226 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1227 char cmd_buf
[cmd_buf_len
];
1228 uint32_t flags
, status
;
1231 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_NEXT_INDEX
);
1232 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1233 cmd
.cmd_version
= htobe32(0);
1236 memset(&rq
, 0, sizeof(rq
));
1237 rq
.stream_id
= htobe64(stream
->viewer_stream_id
);
1240 * Merge the cmd and connection request to prevent a write-write
1241 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1242 * second write to be performed quickly in presence of Nagle's algorithm.
1244 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1245 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1246 ret_len
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1247 if (ret_len
== BT_SOCKET_ERROR
) {
1248 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1249 "Error sending get_next_index request: %s",
1250 bt_socket_errormsg());
1254 BT_ASSERT(ret_len
== cmd_buf_len
);
1255 ret_len
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1257 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1258 "Remote side has closed connection");
1261 if (ret_len
== BT_SOCKET_ERROR
) {
1262 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1263 "Error receiving get_next_index response: %s",
1264 bt_socket_errormsg());
1267 BT_ASSERT(ret_len
== sizeof(rp
));
1269 flags
= be32toh(rp
.flags
);
1270 status
= be32toh(rp
.status
);
1273 case LTTNG_VIEWER_INDEX_INACTIVE
:
1275 uint64_t ctf_stream_class_id
;
1277 BT_COMP_LOGD("Received get_next_index response: inactive");
1278 memset(index
, 0, sizeof(struct packet_index
));
1279 index
->ts_cycles
.timestamp_end
= be64toh(rp
.timestamp_end
);
1280 stream
->current_inactivity_ts
= index
->ts_cycles
.timestamp_end
;
1281 ctf_stream_class_id
= be64toh(rp
.stream_id
);
1282 if (stream
->ctf_stream_class_id
!= -1ULL) {
1283 BT_ASSERT(stream
->ctf_stream_class_id
==
1284 ctf_stream_class_id
);
1286 stream
->ctf_stream_class_id
= ctf_stream_class_id
;
1288 stream
->state
= LTTNG_LIVE_STREAM_QUIESCENT
;
1291 case LTTNG_VIEWER_INDEX_OK
:
1293 uint64_t ctf_stream_class_id
;
1295 BT_COMP_LOGD("Received get_next_index response: OK");
1296 lttng_index_to_packet_index(&rp
, index
);
1297 ctf_stream_class_id
= be64toh(rp
.stream_id
);
1298 if (stream
->ctf_stream_class_id
!= -1ULL) {
1299 BT_ASSERT(stream
->ctf_stream_class_id
==
1300 ctf_stream_class_id
);
1302 stream
->ctf_stream_class_id
= ctf_stream_class_id
;
1305 stream
->state
= LTTNG_LIVE_STREAM_ACTIVE_DATA
;
1307 if (flags
& LTTNG_VIEWER_FLAG_NEW_METADATA
) {
1308 BT_COMP_LOGD("Received get_next_index response: new metadata needed");
1309 trace
->new_metadata_needed
= true;
1311 if (flags
& LTTNG_VIEWER_FLAG_NEW_STREAM
) {
1312 BT_COMP_LOGD("Received get_next_index response: new streams needed");
1313 lttng_live_need_new_streams(lttng_live_msg_iter
);
1317 case LTTNG_VIEWER_INDEX_RETRY
:
1318 BT_COMP_LOGD("Received get_next_index response: retry");
1319 memset(index
, 0, sizeof(struct packet_index
));
1320 retstatus
= LTTNG_LIVE_ITERATOR_STATUS_AGAIN
;
1321 stream
->state
= LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
;
1323 case LTTNG_VIEWER_INDEX_HUP
:
1324 BT_COMP_LOGD("Received get_next_index response: stream hung up");
1325 memset(index
, 0, sizeof(struct packet_index
));
1326 index
->offset
= EOF
;
1327 retstatus
= LTTNG_LIVE_ITERATOR_STATUS_END
;
1328 stream
->state
= LTTNG_LIVE_STREAM_EOF
;
1329 stream
->has_stream_hung_up
= true;
1331 case LTTNG_VIEWER_INDEX_ERR
:
1332 BT_COMP_LOGD("Received get_next_index response: error");
1333 memset(index
, 0, sizeof(struct packet_index
));
1334 stream
->state
= LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
;
1337 BT_COMP_LOGD("Received get_next_index response: unknown value");
1338 memset(index
, 0, sizeof(struct packet_index
));
1339 stream
->state
= LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
;
1346 if (lttng_live_graph_is_canceled(lttng_live_msg_iter
)) {
1347 retstatus
= LTTNG_LIVE_ITERATOR_STATUS_AGAIN
;
1349 retstatus
= LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
1355 enum bt_msg_iter_medium_status
lttng_live_get_stream_bytes(
1356 struct lttng_live_msg_iter
*lttng_live_msg_iter
,
1357 struct lttng_live_stream_iterator
*stream
, uint8_t *buf
,
1358 uint64_t offset
, uint64_t req_len
, uint64_t *recv_len
)
1360 enum bt_msg_iter_medium_status retstatus
= BT_MSG_ITER_MEDIUM_STATUS_OK
;
1361 struct lttng_viewer_trace_packet rp
;
1362 struct lttng_viewer_cmd cmd
;
1363 struct lttng_viewer_get_packet rq
;
1364 struct live_viewer_connection
*viewer_connection
=
1365 lttng_live_msg_iter
->viewer_connection
;
1366 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1367 struct lttng_live_trace
*trace
= stream
->trace
;
1368 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1369 char cmd_buf
[cmd_buf_len
];
1370 uint32_t flags
, status
;
1373 BT_COMP_LOGD("lttng_live_get_stream_bytes: offset=%" PRIu64
", req_len=%" PRIu64
,
1375 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_PACKET
);
1376 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1377 cmd
.cmd_version
= htobe32(0);
1379 memset(&rq
, 0, sizeof(rq
));
1380 rq
.stream_id
= htobe64(stream
->viewer_stream_id
);
1381 rq
.offset
= htobe64(offset
);
1382 rq
.len
= htobe32(req_len
);
1385 * Merge the cmd and connection request to prevent a write-write
1386 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1387 * second write to be performed quickly in presence of Nagle's algorithm.
1389 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1390 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1391 ret_len
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1392 if (ret_len
== BT_SOCKET_ERROR
) {
1393 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1394 "Error sending get_data_packet request: %s",
1395 bt_socket_errormsg());
1399 BT_ASSERT(ret_len
== cmd_buf_len
);
1400 ret_len
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1402 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1403 "Remote side has closed connection");
1406 if (ret_len
== BT_SOCKET_ERROR
) {
1407 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1408 "Socket error receiving get_data response: %s",
1409 bt_socket_errormsg());
1412 if (ret_len
!= sizeof(rp
)) {
1413 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "get_data_packet: "
1414 "expected %zu, received %zd", sizeof(rp
), ret_len
);
1418 flags
= be32toh(rp
.flags
);
1419 status
= be32toh(rp
.status
);
1422 case LTTNG_VIEWER_GET_PACKET_OK
:
1423 req_len
= be32toh(rp
.len
);
1424 BT_COMP_LOGD("Received get_data_packet response: Ok, "
1425 "packet size : %" PRIu64
"", req_len
);
1427 case LTTNG_VIEWER_GET_PACKET_RETRY
:
1428 /* Unimplemented by relay daemon */
1429 BT_COMP_LOGD("Received get_data_packet response: retry");
1430 retstatus
= BT_MSG_ITER_MEDIUM_STATUS_AGAIN
;
1432 case LTTNG_VIEWER_GET_PACKET_ERR
:
1433 if (flags
& LTTNG_VIEWER_FLAG_NEW_METADATA
) {
1434 BT_COMP_LOGD("get_data_packet: new metadata needed, try again later");
1435 trace
->new_metadata_needed
= true;
1437 if (flags
& LTTNG_VIEWER_FLAG_NEW_STREAM
) {
1438 BT_COMP_LOGD("get_data_packet: new streams needed, try again later");
1439 lttng_live_need_new_streams(lttng_live_msg_iter
);
1441 if (flags
& (LTTNG_VIEWER_FLAG_NEW_METADATA
1442 | LTTNG_VIEWER_FLAG_NEW_STREAM
)) {
1443 retstatus
= BT_MSG_ITER_MEDIUM_STATUS_AGAIN
;
1446 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1447 "Received get_data_packet response: error");
1449 case LTTNG_VIEWER_GET_PACKET_EOF
:
1450 retstatus
= BT_MSG_ITER_MEDIUM_STATUS_EOF
;
1453 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1454 "Received get_data_packet response: unknown");
1462 ret_len
= lttng_live_recv(viewer_connection
, buf
, req_len
);
1464 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1465 "Remote side has closed connection");
1468 if (ret_len
== BT_SOCKET_ERROR
) {
1469 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1470 "Error receiving trace packet: %s",
1471 bt_socket_errormsg());
1474 BT_ASSERT(ret_len
== req_len
);
1475 *recv_len
= ret_len
;
1480 if (lttng_live_graph_is_canceled(lttng_live_msg_iter
)) {
1481 retstatus
= BT_MSG_ITER_MEDIUM_STATUS_AGAIN
;
1483 retstatus
= BT_MSG_ITER_MEDIUM_STATUS_ERROR
;
1489 * Request new streams for a session.
1492 enum lttng_live_iterator_status
lttng_live_get_new_streams(
1493 struct lttng_live_session
*session
)
1495 enum lttng_live_iterator_status status
=
1496 LTTNG_LIVE_ITERATOR_STATUS_OK
;
1497 struct lttng_viewer_cmd cmd
;
1498 struct lttng_viewer_new_streams_request rq
;
1499 struct lttng_viewer_new_streams_response rp
;
1500 struct lttng_live_msg_iter
*lttng_live_msg_iter
=
1501 session
->lttng_live_msg_iter
;
1502 struct live_viewer_connection
*viewer_connection
=
1503 lttng_live_msg_iter
->viewer_connection
;
1504 bt_self_component
*self_comp
= viewer_connection
->self_comp
;
1505 uint32_t streams_count
;
1506 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1507 char cmd_buf
[cmd_buf_len
];
1510 if (!session
->new_streams_needed
) {
1511 return LTTNG_LIVE_ITERATOR_STATUS_OK
;
1514 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_NEW_STREAMS
);
1515 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1516 cmd
.cmd_version
= htobe32(0);
1518 memset(&rq
, 0, sizeof(rq
));
1519 rq
.session_id
= htobe64(session
->id
);
1522 * Merge the cmd and connection request to prevent a write-write
1523 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1524 * second write to be performed quickly in presence of Nagle's algorithm.
1526 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1527 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1528 ret_len
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1529 if (ret_len
== BT_SOCKET_ERROR
) {
1530 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1531 "Error sending get_new_streams request: %s",
1532 bt_socket_errormsg());
1536 BT_ASSERT(ret_len
== cmd_buf_len
);
1537 ret_len
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1539 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1540 "Remote side has closed connection");
1543 if (ret_len
== BT_SOCKET_ERROR
) {
1544 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1545 "Error receiving get_new_streams response");
1548 BT_ASSERT(ret_len
== sizeof(rp
));
1550 streams_count
= be32toh(rp
.streams_count
);
1552 switch(be32toh(rp
.status
)) {
1553 case LTTNG_VIEWER_NEW_STREAMS_OK
:
1554 session
->new_streams_needed
= false;
1556 case LTTNG_VIEWER_NEW_STREAMS_NO_NEW
:
1557 session
->new_streams_needed
= false;
1559 case LTTNG_VIEWER_NEW_STREAMS_HUP
:
1560 session
->new_streams_needed
= false;
1561 session
->closed
= true;
1562 status
= LTTNG_LIVE_ITERATOR_STATUS_END
;
1564 case LTTNG_VIEWER_NEW_STREAMS_ERR
:
1565 BT_COMP_LOGD("Received get_new_streams response: error");
1568 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1569 "Received get_new_streams response: Unknown:"
1570 "return code %u", be32toh(rp
.status
));
1574 if (receive_streams(session
, streams_count
)) {
1575 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "Error receiving streams");
1582 if (lttng_live_graph_is_canceled(lttng_live_msg_iter
)) {
1583 status
= LTTNG_LIVE_ITERATOR_STATUS_AGAIN
;
1585 status
= LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
1586 BT_COMP_LOGE("Error receiving streams.");
1592 struct live_viewer_connection
*live_viewer_connection_create(
1593 const char *url
, bool in_query
,
1594 struct lttng_live_msg_iter
*lttng_live_msg_iter
,
1595 bt_self_component
*self_comp
,
1596 bt_self_component_class
*self_comp_class
,
1597 bt_logging_level log_level
)
1599 struct live_viewer_connection
*viewer_connection
;
1601 viewer_connection
= g_new0(struct live_viewer_connection
, 1);
1603 if (bt_socket_init(log_level
) != 0) {
1604 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
1605 self_comp_class
, "Failed to init socket");
1609 viewer_connection
->log_level
= log_level
;
1611 viewer_connection
->self_comp
= self_comp
;
1612 viewer_connection
->self_comp_class
= self_comp_class
;
1614 bt_object_init_shared(&viewer_connection
->obj
, connection_release
);
1615 viewer_connection
->control_sock
= BT_INVALID_SOCKET
;
1616 viewer_connection
->port
= -1;
1617 viewer_connection
->in_query
= in_query
;
1618 viewer_connection
->lttng_live_msg_iter
= lttng_live_msg_iter
;
1619 viewer_connection
->url
= g_string_new(url
);
1620 if (!viewer_connection
->url
) {
1621 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
1622 self_comp_class
, "Failed to allocate URL buffer");
1626 BT_COMP_LOGI("Establishing connection to url \"%s\"...", url
);
1627 if (lttng_live_connect_viewer(viewer_connection
)) {
1628 BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp
,
1629 self_comp_class
, "Failed to establish connection: "
1633 BT_COMP_LOGI("Connection to url \"%s\" is established", url
);
1634 return viewer_connection
;
1637 if (viewer_connection
) {
1638 live_viewer_connection_destroy(viewer_connection
);
1645 void live_viewer_connection_destroy(
1646 struct live_viewer_connection
*viewer_connection
)
1648 BT_COMP_LOGI("Closing connection to url \"%s\"", viewer_connection
->url
->str
);
1649 lttng_live_disconnect_viewer(viewer_connection
);
1650 if (viewer_connection
->url
) {
1651 g_string_free(viewer_connection
->url
, true);
1653 if (viewer_connection
->relay_hostname
) {
1654 g_string_free(viewer_connection
->relay_hostname
, true);
1656 if (viewer_connection
->target_hostname
) {
1657 g_string_free(viewer_connection
->target_hostname
, true);
1659 if (viewer_connection
->session_name
) {
1660 g_string_free(viewer_connection
->session_name
, true);
1662 g_free(viewer_connection
);