2 * Copyright 2016 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 #include <sys/socket.h>
31 #include <sys/types.h>
32 #include <netinet/in.h>
37 #include <babeltrace/compat/send-internal.h>
38 #include <babeltrace/compiler-internal.h>
39 #include <babeltrace/common-internal.h>
40 #include <babeltrace/graph/graph.h>
42 #define BT_LOG_TAG "PLUGIN-CTF-LTTNG-LIVE-VIEWER"
44 #include "lttng-live-internal.h"
45 #include "viewer-connection.h"
46 #include "lttng-viewer-abi.h"
47 #include "data-stream.h"
50 static ssize_t
lttng_live_recv(struct bt_live_viewer_connection
*viewer_connection
,
51 void *buf
, size_t len
)
54 size_t copied
= 0, to_copy
= len
;
55 struct lttng_live_component
*lttng_live
=
56 viewer_connection
->lttng_live
;
57 int fd
= viewer_connection
->control_sock
;
60 ret
= recv(fd
, buf
+ copied
, to_copy
, 0);
62 assert(ret
<= to_copy
);
66 if (ret
< 0 && errno
== EINTR
) {
67 if (lttng_live
&& bt_graph_is_canceled(lttng_live
->graph
)) {
73 } while (ret
> 0 && to_copy
> 0);
76 /* ret = 0 means orderly shutdown, ret < 0 is error. */
80 static ssize_t
lttng_live_send(struct bt_live_viewer_connection
*viewer_connection
,
81 const void *buf
, size_t len
)
83 struct lttng_live_component
*lttng_live
=
84 viewer_connection
->lttng_live
;
85 int fd
= viewer_connection
->control_sock
;
89 ret
= bt_send_nosigpipe(fd
, buf
, len
);
90 if (ret
< 0 && errno
== EINTR
) {
91 if (lttng_live
&& bt_graph_is_canceled(lttng_live
->graph
)) {
103 static int parse_url(struct bt_live_viewer_connection
*viewer_connection
)
105 char error_buf
[256] = { 0 };
106 struct bt_common_lttng_live_url_parts lttng_live_url_parts
= { 0 };
108 const char *path
= viewer_connection
->url
->str
;
114 lttng_live_url_parts
= bt_common_parse_lttng_live_url(path
,
115 error_buf
, sizeof(error_buf
));
116 if (!lttng_live_url_parts
.proto
) {
117 BT_LOGW("Invalid LTTng live URL format: %s", error_buf
);
121 viewer_connection
->relay_hostname
=
122 lttng_live_url_parts
.hostname
;
123 lttng_live_url_parts
.hostname
= NULL
;
125 if (lttng_live_url_parts
.port
>= 0) {
126 viewer_connection
->port
= lttng_live_url_parts
.port
;
128 viewer_connection
->port
= LTTNG_DEFAULT_NETWORK_VIEWER_PORT
;
131 viewer_connection
->target_hostname
=
132 lttng_live_url_parts
.target_hostname
;
133 lttng_live_url_parts
.target_hostname
= NULL
;
135 if (lttng_live_url_parts
.session_name
) {
136 viewer_connection
->session_name
=
137 lttng_live_url_parts
.session_name
;
138 lttng_live_url_parts
.session_name
= NULL
;
141 BT_LOGD("Connecting to hostname : %s, port : %d, "
142 "target hostname : %s, session name : %s, "
144 viewer_connection
->relay_hostname
->str
,
145 viewer_connection
->port
,
146 viewer_connection
->target_hostname
== NULL
?
147 "<none>" : viewer_connection
->target_hostname
->str
,
148 viewer_connection
->session_name
== NULL
?
149 "<none>" : viewer_connection
->session_name
->str
,
150 lttng_live_url_parts
.proto
->str
);
154 bt_common_destroy_lttng_live_url_parts(<tng_live_url_parts
);
158 static int lttng_live_handshake(struct bt_live_viewer_connection
*viewer_connection
)
160 struct lttng_viewer_cmd cmd
;
161 struct lttng_viewer_connect connect
;
165 cmd
.cmd
= htobe32(LTTNG_VIEWER_CONNECT
);
166 cmd
.data_size
= htobe64((uint64_t) sizeof(connect
));
167 cmd
.cmd_version
= htobe32(0);
169 connect
.viewer_session_id
= -1ULL; /* will be set on recv */
170 connect
.major
= htobe32(LTTNG_LIVE_MAJOR
);
171 connect
.minor
= htobe32(LTTNG_LIVE_MINOR
);
172 connect
.type
= htobe32(LTTNG_VIEWER_CLIENT_COMMAND
);
174 ret_len
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
176 BT_LOGE("Error sending cmd: %s", strerror(errno
));
179 assert(ret_len
== sizeof(cmd
));
181 ret_len
= lttng_live_send(viewer_connection
, &connect
, sizeof(connect
));
183 BT_LOGE("Error sending version: %s", strerror(errno
));
186 assert(ret_len
== sizeof(connect
));
188 ret_len
= lttng_live_recv(viewer_connection
, &connect
, sizeof(connect
));
190 BT_LOGI("Remote side has closed connection");
194 BT_LOGE("Error receiving version: %s", strerror(errno
));
197 assert(ret_len
== sizeof(connect
));
199 BT_LOGD("Received viewer session ID : %" PRIu64
,
200 be64toh(connect
.viewer_session_id
));
201 BT_LOGD("Relayd version : %u.%u", be32toh(connect
.major
),
202 be32toh(connect
.minor
));
204 if (LTTNG_LIVE_MAJOR
!= be32toh(connect
.major
)) {
205 BT_LOGE("Incompatible lttng-relayd protocol");
208 /* Use the smallest protocol version implemented. */
209 if (LTTNG_LIVE_MINOR
> be32toh(connect
.minor
)) {
210 viewer_connection
->minor
= be32toh(connect
.minor
);
212 viewer_connection
->minor
= LTTNG_LIVE_MINOR
;
214 viewer_connection
->major
= LTTNG_LIVE_MAJOR
;
219 BT_LOGE("Unable to establish connection");
223 static int lttng_live_connect_viewer(struct bt_live_viewer_connection
*viewer_connection
)
225 struct hostent
*host
;
226 struct sockaddr_in server_addr
;
229 if (parse_url(viewer_connection
)) {
233 host
= gethostbyname(viewer_connection
->relay_hostname
->str
);
235 BT_LOGE("Cannot lookup hostname %s",
236 viewer_connection
->relay_hostname
->str
);
240 if ((viewer_connection
->control_sock
= socket(AF_INET
, SOCK_STREAM
, 0)) == -1) {
241 BT_LOGE("Socket creation failed: %s", strerror(errno
));
245 server_addr
.sin_family
= AF_INET
;
246 server_addr
.sin_port
= htons(viewer_connection
->port
);
247 server_addr
.sin_addr
= *((struct in_addr
*) host
->h_addr
);
248 memset(&(server_addr
.sin_zero
), 0, 8);
250 if (connect(viewer_connection
->control_sock
, (struct sockaddr
*) &server_addr
,
251 sizeof(struct sockaddr
)) == -1) {
252 BT_LOGE("Connection failed: %s", strerror(errno
));
255 if (lttng_live_handshake(viewer_connection
)) {
264 if (viewer_connection
->control_sock
>= 0) {
265 if (close(viewer_connection
->control_sock
)) {
266 BT_LOGE("Close: %s", strerror(errno
));
269 viewer_connection
->control_sock
= -1;
273 static void lttng_live_disconnect_viewer(struct bt_live_viewer_connection
*viewer_connection
)
275 if (viewer_connection
->control_sock
< 0) {
278 if (close(viewer_connection
->control_sock
)) {
279 BT_LOGE("Close: %s", strerror(errno
));
280 viewer_connection
->control_sock
= -1;
284 static void connection_release(struct bt_object
*obj
)
286 struct bt_live_viewer_connection
*conn
=
287 container_of(obj
, struct bt_live_viewer_connection
, obj
);
289 bt_live_viewer_connection_destroy(conn
);
293 enum bt_value_status
list_update_session(struct bt_value
*results
,
294 const struct lttng_viewer_session
*session
,
297 enum bt_value_status ret
= BT_VALUE_STATUS_OK
;
298 struct bt_value
*map
= NULL
;
299 struct bt_value
*hostname
= NULL
;
300 struct bt_value
*session_name
= NULL
;
301 struct bt_value
*btval
= NULL
;
305 len
= bt_value_array_size(results
);
307 ret
= BT_VALUE_STATUS_ERROR
;
310 for (i
= 0; i
< len
; i
++) {
311 const char *hostname_str
= NULL
;
312 const char *session_name_str
= NULL
;
314 map
= bt_value_array_get(results
, (size_t) i
);
316 ret
= BT_VALUE_STATUS_ERROR
;
319 hostname
= bt_value_map_get(map
, "target-hostname");
321 ret
= BT_VALUE_STATUS_ERROR
;
324 session_name
= bt_value_map_get(map
, "session-name");
326 ret
= BT_VALUE_STATUS_ERROR
;
329 ret
= bt_value_string_get(hostname
, &hostname_str
);
330 if (ret
!= BT_VALUE_STATUS_OK
) {
333 ret
= bt_value_string_get(session_name
, &session_name_str
);
334 if (ret
!= BT_VALUE_STATUS_OK
) {
338 if (!strcmp(session
->hostname
, hostname_str
)
339 && !strcmp(session
->session_name
,
342 uint32_t streams
= be32toh(session
->streams
);
343 uint32_t clients
= be32toh(session
->clients
);
347 btval
= bt_value_map_get(map
, "stream-count");
349 ret
= BT_VALUE_STATUS_ERROR
;
352 ret
= bt_value_integer_get(btval
, &val
);
353 if (ret
!= BT_VALUE_STATUS_OK
) {
358 ret
= bt_value_integer_set(btval
, val
);
359 if (ret
!= BT_VALUE_STATUS_OK
) {
364 btval
= bt_value_map_get(map
, "client-count");
366 ret
= BT_VALUE_STATUS_ERROR
;
369 ret
= bt_value_integer_get(btval
, &val
);
370 if (ret
!= BT_VALUE_STATUS_OK
) {
374 val
= max_t(int64_t, clients
, val
);
375 ret
= bt_value_integer_set(btval
, val
);
376 if (ret
!= BT_VALUE_STATUS_OK
) {
383 BT_PUT(session_name
);
393 BT_PUT(session_name
);
400 enum bt_value_status
list_append_session(struct bt_value
*results
,
402 const struct lttng_viewer_session
*session
)
404 enum bt_value_status ret
= BT_VALUE_STATUS_OK
;
405 struct bt_value
*map
= NULL
;
410 * If the session already exists, add the stream count to it,
411 * and do max of client counts.
413 ret
= list_update_session(results
, session
, &found
);
414 if (ret
!= BT_VALUE_STATUS_OK
|| found
) {
418 map
= bt_value_map_create();
420 ret
= BT_VALUE_STATUS_ERROR
;
424 if (base_url
->len
< 1) {
425 ret
= BT_VALUE_STATUS_ERROR
;
432 url
= g_string_new(base_url
->str
);
433 g_string_append(url
, "/host/");
434 g_string_append(url
, session
->hostname
);
435 g_string_append_c(url
, '/');
436 g_string_append(url
, session
->session_name
);
438 ret
= bt_value_map_insert_string(map
, "url", url
->str
);
439 if (ret
!= BT_VALUE_STATUS_OK
) {
444 * key = "target-hostname",
447 ret
= bt_value_map_insert_string(map
, "target-hostname",
449 if (ret
!= BT_VALUE_STATUS_OK
) {
454 * key = "session-name",
457 ret
= bt_value_map_insert_string(map
, "session-name",
458 session
->session_name
);
459 if (ret
!= BT_VALUE_STATUS_OK
) {
468 uint32_t live_timer
= be32toh(session
->live_timer
);
470 ret
= bt_value_map_insert_integer(map
, "timer-us",
472 if (ret
!= BT_VALUE_STATUS_OK
) {
478 * key = "stream-count",
482 uint32_t streams
= be32toh(session
->streams
);
484 ret
= bt_value_map_insert_integer(map
, "stream-count",
486 if (ret
!= BT_VALUE_STATUS_OK
) {
493 * key = "client-count",
497 uint32_t clients
= be32toh(session
->clients
);
499 ret
= bt_value_map_insert_integer(map
, "client-count",
501 if (ret
!= BT_VALUE_STATUS_OK
) {
506 ret
= bt_value_array_append(results
, map
);
509 g_string_free(url
, TRUE
);
516 * Data structure returned:
527 * key = "target-hostname",
531 * key = "session-name",
539 * key = "stream-count",
543 * key = "client-count",
552 struct bt_value
*bt_live_viewer_connection_list_sessions(struct bt_live_viewer_connection
*viewer_connection
)
554 struct bt_value
*results
= NULL
;
555 struct lttng_viewer_cmd cmd
;
556 struct lttng_viewer_list_sessions list
;
557 uint32_t i
, sessions_count
;
560 if (lttng_live_handshake(viewer_connection
)) {
564 results
= bt_value_array_create();
566 BT_LOGE("Error creating array");
570 cmd
.cmd
= htobe32(LTTNG_VIEWER_LIST_SESSIONS
);
571 cmd
.data_size
= htobe64((uint64_t) 0);
572 cmd
.cmd_version
= htobe32(0);
574 ret_len
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
576 BT_LOGE("Error sending cmd: %s", strerror(errno
));
579 assert(ret_len
== sizeof(cmd
));
581 ret_len
= lttng_live_recv(viewer_connection
, &list
, sizeof(list
));
583 BT_LOGI("Remote side has closed connection");
587 BT_LOGE("Error receiving session list: %s", strerror(errno
));
590 assert(ret_len
== sizeof(list
));
592 sessions_count
= be32toh(list
.sessions_count
);
593 for (i
= 0; i
< sessions_count
; i
++) {
594 struct lttng_viewer_session lsession
;
596 ret_len
= lttng_live_recv(viewer_connection
,
597 &lsession
, sizeof(lsession
));
599 BT_LOGI("Remote side has closed connection");
603 BT_LOGE("Error receiving session: %s", strerror(errno
));
606 assert(ret_len
== sizeof(lsession
));
607 lsession
.hostname
[LTTNG_VIEWER_HOST_NAME_MAX
- 1] = '\0';
608 lsession
.session_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
609 if (list_append_session(results
,
610 viewer_connection
->url
, &lsession
)
611 != BT_VALUE_STATUS_OK
) {
623 int lttng_live_query_session_ids(struct lttng_live_component
*lttng_live
)
625 struct lttng_viewer_cmd cmd
;
626 struct lttng_viewer_list_sessions list
;
627 struct lttng_viewer_session lsession
;
628 uint32_t i
, sessions_count
;
631 struct bt_live_viewer_connection
*viewer_connection
=
632 lttng_live
->viewer_connection
;
634 cmd
.cmd
= htobe32(LTTNG_VIEWER_LIST_SESSIONS
);
635 cmd
.data_size
= htobe64((uint64_t) 0);
636 cmd
.cmd_version
= htobe32(0);
638 ret_len
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
640 BT_LOGE("Error sending cmd: %s", strerror(errno
));
643 assert(ret_len
== sizeof(cmd
));
645 ret_len
= lttng_live_recv(viewer_connection
, &list
, sizeof(list
));
647 BT_LOGI("Remote side has closed connection");
651 BT_LOGE("Error receiving session list: %s", strerror(errno
));
654 assert(ret_len
== sizeof(list
));
656 sessions_count
= be32toh(list
.sessions_count
);
657 for (i
= 0; i
< sessions_count
; i
++) {
658 ret_len
= lttng_live_recv(viewer_connection
,
659 &lsession
, sizeof(lsession
));
661 BT_LOGI("Remote side has closed connection");
665 BT_LOGE("Error receiving session: %s", strerror(errno
));
668 assert(ret_len
== sizeof(lsession
));
669 lsession
.hostname
[LTTNG_VIEWER_HOST_NAME_MAX
- 1] = '\0';
670 lsession
.session_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
671 session_id
= be64toh(lsession
.id
);
673 if ((strncmp(lsession
.session_name
,
674 viewer_connection
->session_name
->str
,
675 MAXNAMLEN
) == 0) && (strncmp(lsession
.hostname
,
676 viewer_connection
->target_hostname
->str
,
678 if (lttng_live_add_session(lttng_live
, session_id
)) {
687 BT_LOGE("Unable to query session ids");
692 int lttng_live_create_viewer_session(struct lttng_live_component
*lttng_live
)
694 struct lttng_viewer_cmd cmd
;
695 struct lttng_viewer_create_session_response resp
;
697 struct bt_live_viewer_connection
*viewer_connection
=
698 lttng_live
->viewer_connection
;
700 cmd
.cmd
= htobe32(LTTNG_VIEWER_CREATE_SESSION
);
701 cmd
.data_size
= htobe64((uint64_t) 0);
702 cmd
.cmd_version
= htobe32(0);
704 ret_len
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
706 BT_LOGE("Error sending cmd: %s", strerror(errno
));
709 assert(ret_len
== sizeof(cmd
));
711 ret_len
= lttng_live_recv(viewer_connection
, &resp
, sizeof(resp
));
713 BT_LOGI("Remote side has closed connection");
717 BT_LOGE("Error receiving create session reply: %s", strerror(errno
));
720 assert(ret_len
== sizeof(resp
));
722 if (be32toh(resp
.status
) != LTTNG_VIEWER_CREATE_SESSION_OK
) {
723 BT_LOGE("Error creating viewer session");
726 if (lttng_live_query_session_ids(lttng_live
)) {
737 int receive_streams(struct lttng_live_session
*session
,
738 uint32_t stream_count
)
742 struct lttng_live_component
*lttng_live
= session
->lttng_live
;
743 struct bt_live_viewer_connection
*viewer_connection
=
744 lttng_live
->viewer_connection
;
746 BT_LOGD("Getting %" PRIu32
" new streams:", stream_count
);
747 for (i
= 0; i
< stream_count
; i
++) {
748 struct lttng_viewer_stream stream
;
749 struct lttng_live_stream_iterator
*live_stream
;
751 uint64_t ctf_trace_id
;
753 ret_len
= lttng_live_recv(viewer_connection
, &stream
, sizeof(stream
));
755 BT_LOGI("Remote side has closed connection");
759 BT_LOGE("Error receiving stream");
762 assert(ret_len
== sizeof(stream
));
763 stream
.path_name
[LTTNG_VIEWER_PATH_MAX
- 1] = '\0';
764 stream
.channel_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
765 stream_id
= be64toh(stream
.id
);
766 ctf_trace_id
= be64toh(stream
.ctf_trace_id
);
768 if (stream
.metadata_flag
) {
769 BT_LOGD(" metadata stream %" PRIu64
" : %s/%s",
770 stream_id
, stream
.path_name
,
771 stream
.channel_name
);
772 if (lttng_live_metadata_create_stream(session
,
773 ctf_trace_id
, stream_id
)) {
774 BT_LOGE("Error creating metadata stream");
778 session
->lazy_stream_notif_init
= true;
780 BT_LOGD(" stream %" PRIu64
" : %s/%s",
781 stream_id
, stream
.path_name
,
782 stream
.channel_name
);
783 live_stream
= lttng_live_stream_iterator_create(session
,
784 ctf_trace_id
, stream_id
);
786 BT_LOGE("Error creating streamn");
798 int lttng_live_attach_session(struct lttng_live_session
*session
)
800 struct lttng_viewer_cmd cmd
;
801 struct lttng_viewer_attach_session_request rq
;
802 struct lttng_viewer_attach_session_response rp
;
804 struct lttng_live_component
*lttng_live
= session
->lttng_live
;
805 struct bt_live_viewer_connection
*viewer_connection
=
806 lttng_live
->viewer_connection
;
807 uint64_t session_id
= session
->id
;
808 uint32_t streams_count
;
810 if (session
->attached
) {
814 cmd
.cmd
= htobe32(LTTNG_VIEWER_ATTACH_SESSION
);
815 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
816 cmd
.cmd_version
= htobe32(0);
818 memset(&rq
, 0, sizeof(rq
));
819 rq
.session_id
= htobe64(session_id
);
820 // TODO: add cmd line parameter to select seek beginning
821 // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING);
822 rq
.seek
= htobe32(LTTNG_VIEWER_SEEK_LAST
);
824 ret_len
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
826 BT_LOGE("Error sending cmd: %s", strerror(errno
));
829 assert(ret_len
== sizeof(cmd
));
831 ret_len
= lttng_live_send(viewer_connection
, &rq
, sizeof(rq
));
833 BT_LOGE("Error sending attach request: %s", strerror(errno
));
836 assert(ret_len
== sizeof(rq
));
838 ret_len
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
840 BT_LOGI("Remote side has closed connection");
844 BT_LOGE("Error receiving attach response: %s", strerror(errno
));
847 assert(ret_len
== sizeof(rp
));
849 streams_count
= be32toh(rp
.streams_count
);
850 switch(be32toh(rp
.status
)) {
851 case LTTNG_VIEWER_ATTACH_OK
:
853 case LTTNG_VIEWER_ATTACH_UNK
:
854 BT_LOGW("Session id %" PRIu64
" is unknown", session_id
);
856 case LTTNG_VIEWER_ATTACH_ALREADY
:
857 BT_LOGW("There is already a viewer attached to this session");
859 case LTTNG_VIEWER_ATTACH_NOT_LIVE
:
860 BT_LOGW("Not a live session");
862 case LTTNG_VIEWER_ATTACH_SEEK_ERR
:
863 BT_LOGE("Wrong seek parameter");
866 BT_LOGE("Unknown attach return code %u", be32toh(rp
.status
));
870 /* We receive the initial list of streams. */
871 if (receive_streams(session
, streams_count
)) {
875 session
->attached
= true;
876 session
->new_streams_needed
= false;
885 int lttng_live_detach_session(struct lttng_live_session
*session
)
887 struct lttng_viewer_cmd cmd
;
888 struct lttng_viewer_detach_session_request rq
;
889 struct lttng_viewer_detach_session_response rp
;
891 struct lttng_live_component
*lttng_live
= session
->lttng_live
;
892 struct bt_live_viewer_connection
*viewer_connection
=
893 lttng_live
->viewer_connection
;
894 uint64_t session_id
= session
->id
;
896 if (!session
->attached
) {
900 cmd
.cmd
= htobe32(LTTNG_VIEWER_DETACH_SESSION
);
901 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
902 cmd
.cmd_version
= htobe32(0);
904 memset(&rq
, 0, sizeof(rq
));
905 rq
.session_id
= htobe64(session_id
);
907 ret_len
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
909 BT_LOGE("Error sending cmd: %s", strerror(errno
));
912 assert(ret_len
== sizeof(cmd
));
914 ret_len
= lttng_live_send(viewer_connection
, &rq
, sizeof(rq
));
916 BT_LOGE("Error sending detach request: %s", strerror(errno
));
919 assert(ret_len
== sizeof(rq
));
921 ret_len
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
923 BT_LOGI("Remote side has closed connection");
927 BT_LOGE("Error receiving detach response: %s", strerror(errno
));
930 assert(ret_len
== sizeof(rp
));
932 switch(be32toh(rp
.status
)) {
933 case LTTNG_VIEWER_DETACH_SESSION_OK
:
935 case LTTNG_VIEWER_DETACH_SESSION_UNK
:
936 BT_LOGW("Session id %" PRIu64
" is unknown", session_id
);
938 case LTTNG_VIEWER_DETACH_SESSION_ERR
:
939 BT_LOGW("Error detaching session id %" PRIu64
"", session_id
);
942 BT_LOGE("Unknown detach return code %u", be32toh(rp
.status
));
946 session
->attached
= false;
955 ssize_t
lttng_live_get_one_metadata_packet(struct lttng_live_trace
*trace
,
960 struct lttng_viewer_cmd cmd
;
961 struct lttng_viewer_get_metadata rq
;
962 struct lttng_viewer_metadata_packet rp
;
965 struct lttng_live_session
*session
= trace
->session
;
966 struct lttng_live_component
*lttng_live
= session
->lttng_live
;
967 struct lttng_live_metadata
*metadata
= trace
->metadata
;
968 struct bt_live_viewer_connection
*viewer_connection
=
969 lttng_live
->viewer_connection
;
971 rq
.stream_id
= htobe64(metadata
->stream_id
);
972 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_METADATA
);
973 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
974 cmd
.cmd_version
= htobe32(0);
976 ret_len
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
978 BT_LOGE("Error sending cmd: %s", strerror(errno
));
981 assert(ret_len
== sizeof(cmd
));
983 ret_len
= lttng_live_send(viewer_connection
, &rq
, sizeof(rq
));
985 BT_LOGE("Error sending get_metadata request: %s", strerror(errno
));
988 assert(ret_len
== sizeof(rq
));
990 ret_len
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
992 BT_LOGI("Remote side has closed connection");
996 BT_LOGE("Error receiving get_metadata response: %s", strerror(errno
));
999 assert(ret_len
== sizeof(rp
));
1001 switch (be32toh(rp
.status
)) {
1002 case LTTNG_VIEWER_METADATA_OK
:
1003 BT_LOGD("get_metadata : OK");
1005 case LTTNG_VIEWER_NO_NEW_METADATA
:
1006 BT_LOGD("get_metadata : NO NEW");
1009 case LTTNG_VIEWER_METADATA_ERR
:
1010 BT_LOGD("get_metadata : ERR");
1013 BT_LOGD("get_metadata : UNKNOWN");
1017 len
= be64toh(rp
.len
);
1018 BT_LOGD("Writing %" PRIu64
" bytes to metadata", len
);
1023 data
= zmalloc(len
);
1025 BT_LOGE("relay data zmalloc: %s", strerror(errno
));
1028 ret_len
= lttng_live_recv(viewer_connection
, data
, len
);
1030 BT_LOGI("Remote side has closed connection");
1031 goto error_free_data
;
1034 BT_LOGE("Error receiving trace packet: %s", strerror(errno
));
1035 goto error_free_data
;
1037 assert(ret_len
== len
);
1040 ret_len
= fwrite(data
, 1, len
, fp
);
1041 } while (ret_len
< 0 && errno
== EINTR
);
1043 BT_LOGE("Writing in the metadata fp");
1044 goto error_free_data
;
1046 assert(ret_len
== len
);
1059 * Assign the fields from a lttng_viewer_index to a packet_index.
1062 void lttng_index_to_packet_index(struct lttng_viewer_index
*lindex
,
1063 struct packet_index
*pindex
)
1068 pindex
->offset
= be64toh(lindex
->offset
);
1069 pindex
->packet_size
= be64toh(lindex
->packet_size
);
1070 pindex
->content_size
= be64toh(lindex
->content_size
);
1071 pindex
->ts_cycles
.timestamp_begin
= be64toh(lindex
->timestamp_begin
);
1072 pindex
->ts_cycles
.timestamp_end
= be64toh(lindex
->timestamp_end
);
1073 pindex
->events_discarded
= be64toh(lindex
->events_discarded
);
1077 enum bt_ctf_lttng_live_iterator_status
lttng_live_get_next_index(struct lttng_live_component
*lttng_live
,
1078 struct lttng_live_stream_iterator
*stream
,
1079 struct packet_index
*index
)
1081 struct lttng_viewer_cmd cmd
;
1082 struct lttng_viewer_get_next_index rq
;
1084 struct lttng_viewer_index rp
;
1085 uint32_t flags
, status
;
1086 enum bt_ctf_lttng_live_iterator_status retstatus
=
1087 BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK
;
1088 struct bt_live_viewer_connection
*viewer_connection
=
1089 lttng_live
->viewer_connection
;
1090 struct lttng_live_trace
*trace
= stream
->trace
;
1092 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_NEXT_INDEX
);
1093 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1094 cmd
.cmd_version
= htobe32(0);
1096 memset(&rq
, 0, sizeof(rq
));
1097 rq
.stream_id
= htobe64(stream
->viewer_stream_id
);
1099 ret_len
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
1101 BT_LOGE("Error sending cmd: %s", strerror(errno
));
1104 assert(ret_len
== sizeof(cmd
));
1106 ret_len
= lttng_live_send(viewer_connection
, &rq
, sizeof(rq
));
1108 BT_LOGE("Error sending get_next_index request: %s", strerror(errno
));
1111 assert(ret_len
== sizeof(rq
));
1113 ret_len
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1115 BT_LOGI("Remote side has closed connection");
1119 BT_LOGE("Error receiving get_next_index response: %s", strerror(errno
));
1122 assert(ret_len
== sizeof(rp
));
1124 flags
= be32toh(rp
.flags
);
1125 status
= be32toh(rp
.status
);
1128 case LTTNG_VIEWER_INDEX_INACTIVE
:
1130 uint64_t ctf_stream_class_id
;
1132 BT_LOGD("get_next_index: inactive");
1133 memset(index
, 0, sizeof(struct packet_index
));
1134 index
->ts_cycles
.timestamp_end
= be64toh(rp
.timestamp_end
);
1135 stream
->current_inactivity_timestamp
= index
->ts_cycles
.timestamp_end
;
1136 ctf_stream_class_id
= be64toh(rp
.stream_id
);
1137 if (stream
->ctf_stream_class_id
!= -1ULL) {
1138 assert(stream
->ctf_stream_class_id
==
1139 ctf_stream_class_id
);
1141 stream
->ctf_stream_class_id
= ctf_stream_class_id
;
1143 stream
->state
= LTTNG_LIVE_STREAM_QUIESCENT
;
1146 case LTTNG_VIEWER_INDEX_OK
:
1148 uint64_t ctf_stream_class_id
;
1150 BT_LOGD("get_next_index: OK");
1151 lttng_index_to_packet_index(&rp
, index
);
1152 ctf_stream_class_id
= be64toh(rp
.stream_id
);
1153 if (stream
->ctf_stream_class_id
!= -1ULL) {
1154 assert(stream
->ctf_stream_class_id
==
1155 ctf_stream_class_id
);
1157 stream
->ctf_stream_class_id
= ctf_stream_class_id
;
1160 stream
->state
= LTTNG_LIVE_STREAM_ACTIVE_DATA
;
1161 stream
->current_packet_end_timestamp
=
1162 index
->ts_cycles
.timestamp_end
;
1164 if (flags
& LTTNG_VIEWER_FLAG_NEW_METADATA
) {
1165 BT_LOGD("get_next_index: new metadata needed");
1166 trace
->new_metadata_needed
= true;
1168 if (flags
& LTTNG_VIEWER_FLAG_NEW_STREAM
) {
1169 BT_LOGD("get_next_index: new streams needed");
1170 lttng_live_need_new_streams(lttng_live
);
1174 case LTTNG_VIEWER_INDEX_RETRY
:
1175 BT_LOGD("get_next_index: retry");
1176 memset(index
, 0, sizeof(struct packet_index
));
1177 retstatus
= BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN
;
1178 stream
->state
= LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
;
1180 case LTTNG_VIEWER_INDEX_HUP
:
1181 BT_LOGD("get_next_index: stream hung up");
1182 memset(index
, 0, sizeof(struct packet_index
));
1183 index
->offset
= EOF
;
1184 retstatus
= BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END
;
1185 stream
->state
= LTTNG_LIVE_STREAM_EOF
;
1187 case LTTNG_VIEWER_INDEX_ERR
:
1188 BT_LOGE("get_next_index: error");
1189 memset(index
, 0, sizeof(struct packet_index
));
1190 stream
->state
= LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
;
1193 BT_LOGE("get_next_index: unknown value");
1194 memset(index
, 0, sizeof(struct packet_index
));
1195 stream
->state
= LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
;
1202 if (bt_graph_is_canceled(lttng_live
->graph
)) {
1203 retstatus
= BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN
;
1205 retstatus
= BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
1211 enum bt_ctf_notif_iter_medium_status
lttng_live_get_stream_bytes(struct lttng_live_component
*lttng_live
,
1212 struct lttng_live_stream_iterator
*stream
, uint8_t *buf
, uint64_t offset
,
1213 uint64_t req_len
, uint64_t *recv_len
)
1215 enum bt_ctf_notif_iter_medium_status retstatus
= BT_CTF_NOTIF_ITER_MEDIUM_STATUS_OK
;
1216 struct lttng_viewer_cmd cmd
;
1217 struct lttng_viewer_get_packet rq
;
1218 struct lttng_viewer_trace_packet rp
;
1220 uint32_t flags
, status
;
1221 struct bt_live_viewer_connection
*viewer_connection
=
1222 lttng_live
->viewer_connection
;
1223 struct lttng_live_trace
*trace
= stream
->trace
;
1225 BT_LOGD("lttng_live_get_stream_bytes: offset=%" PRIu64
", req_len=%" PRIu64
,
1227 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_PACKET
);
1228 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1229 cmd
.cmd_version
= htobe32(0);
1231 memset(&rq
, 0, sizeof(rq
));
1232 rq
.stream_id
= htobe64(stream
->viewer_stream_id
);
1233 rq
.offset
= htobe64(offset
);
1234 rq
.len
= htobe32(req_len
);
1236 ret_len
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
1238 BT_LOGE("Error sending cmd: %s", strerror(errno
));
1241 assert(ret_len
== sizeof(cmd
));
1243 ret_len
= lttng_live_send(viewer_connection
, &rq
, sizeof(rq
));
1245 BT_LOGE("Error sending get_data request: %s", strerror(errno
));
1248 assert(ret_len
== sizeof(rq
));
1250 ret_len
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1252 BT_LOGI("Remote side has closed connection");
1256 BT_LOGE("Error receiving get_data response: %s", strerror(errno
));
1259 if (ret_len
!= sizeof(rp
)) {
1260 BT_LOGE("get_data_packet: expected %zu"
1261 ", received %zd", sizeof(rp
),
1266 flags
= be32toh(rp
.flags
);
1267 status
= be32toh(rp
.status
);
1270 case LTTNG_VIEWER_GET_PACKET_OK
:
1271 req_len
= be32toh(rp
.len
);
1272 BT_LOGD("get_data_packet: Ok, packet size : %" PRIu64
"", req_len
);
1274 case LTTNG_VIEWER_GET_PACKET_RETRY
:
1275 /* Unimplemented by relay daemon */
1276 BT_LOGD("get_data_packet: retry");
1277 retstatus
= BT_CTF_NOTIF_ITER_MEDIUM_STATUS_AGAIN
;
1279 case LTTNG_VIEWER_GET_PACKET_ERR
:
1280 if (flags
& LTTNG_VIEWER_FLAG_NEW_METADATA
) {
1281 BT_LOGD("get_data_packet: new metadata needed, try again later");
1282 trace
->new_metadata_needed
= true;
1284 if (flags
& LTTNG_VIEWER_FLAG_NEW_STREAM
) {
1285 BT_LOGD("get_data_packet: new streams needed, try again later");
1286 lttng_live_need_new_streams(lttng_live
);
1288 if (flags
& (LTTNG_VIEWER_FLAG_NEW_METADATA
1289 | LTTNG_VIEWER_FLAG_NEW_STREAM
)) {
1290 retstatus
= BT_CTF_NOTIF_ITER_MEDIUM_STATUS_AGAIN
;
1293 BT_LOGE("get_data_packet: error");
1295 case LTTNG_VIEWER_GET_PACKET_EOF
:
1296 retstatus
= BT_CTF_NOTIF_ITER_MEDIUM_STATUS_EOF
;
1299 BT_LOGE("get_data_packet: unknown");
1307 ret_len
= lttng_live_recv(viewer_connection
, buf
, req_len
);
1309 BT_LOGI("Remote side has closed connection");
1313 BT_LOGE("Error receiving trace packet: %s", strerror(errno
));
1316 assert(ret_len
== req_len
);
1317 *recv_len
= ret_len
;
1322 if (bt_graph_is_canceled(lttng_live
->graph
)) {
1323 retstatus
= BT_CTF_NOTIF_ITER_MEDIUM_STATUS_AGAIN
;
1325 retstatus
= BT_CTF_NOTIF_ITER_MEDIUM_STATUS_ERROR
;
1331 * Request new streams for a session.
1334 enum bt_ctf_lttng_live_iterator_status
lttng_live_get_new_streams(
1335 struct lttng_live_session
*session
)
1337 enum bt_ctf_lttng_live_iterator_status status
=
1338 BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK
;
1339 struct lttng_viewer_cmd cmd
;
1340 struct lttng_viewer_new_streams_request rq
;
1341 struct lttng_viewer_new_streams_response rp
;
1343 struct lttng_live_component
*lttng_live
= session
->lttng_live
;
1344 struct bt_live_viewer_connection
*viewer_connection
=
1345 lttng_live
->viewer_connection
;
1346 uint32_t streams_count
;
1348 if (!session
->new_streams_needed
) {
1349 return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK
;
1352 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_NEW_STREAMS
);
1353 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1354 cmd
.cmd_version
= htobe32(0);
1356 memset(&rq
, 0, sizeof(rq
));
1357 rq
.session_id
= htobe64(session
->id
);
1359 ret_len
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
1361 BT_LOGE("Error sending cmd: %s", strerror(errno
));
1364 assert(ret_len
== sizeof(cmd
));
1366 ret_len
= lttng_live_send(viewer_connection
, &rq
, sizeof(rq
));
1368 BT_LOGE("Error sending get_new_streams request: %s", strerror(errno
));
1371 assert(ret_len
== sizeof(rq
));
1373 ret_len
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1375 BT_LOGI("Remote side has closed connection");
1379 BT_LOGE("Error receiving get_new_streams response");
1382 assert(ret_len
== sizeof(rp
));
1384 streams_count
= be32toh(rp
.streams_count
);
1386 switch(be32toh(rp
.status
)) {
1387 case LTTNG_VIEWER_NEW_STREAMS_OK
:
1388 session
->new_streams_needed
= false;
1390 case LTTNG_VIEWER_NEW_STREAMS_NO_NEW
:
1391 session
->new_streams_needed
= false;
1393 case LTTNG_VIEWER_NEW_STREAMS_HUP
:
1394 session
->new_streams_needed
= false;
1395 session
->closed
= true;
1396 status
= BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END
;
1398 case LTTNG_VIEWER_NEW_STREAMS_ERR
:
1399 BT_LOGE("get_new_streams error");
1402 BT_LOGE("Unknown return code %u", be32toh(rp
.status
));
1406 if (receive_streams(session
, streams_count
)) {
1413 if (bt_graph_is_canceled(lttng_live
->graph
)) {
1414 status
= BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN
;
1416 status
= BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
1422 struct bt_live_viewer_connection
*
1423 bt_live_viewer_connection_create(const char *url
,
1424 struct lttng_live_component
*lttng_live
)
1426 struct bt_live_viewer_connection
*viewer_connection
;
1428 viewer_connection
= g_new0(struct bt_live_viewer_connection
, 1);
1430 bt_object_init(&viewer_connection
->obj
, connection_release
);
1431 viewer_connection
->control_sock
= -1;
1432 viewer_connection
->port
= -1;
1433 viewer_connection
->lttng_live
= lttng_live
;
1434 viewer_connection
->url
= g_string_new(url
);
1435 if (!viewer_connection
->url
) {
1439 BT_LOGD("Establishing connection to url \"%s\"...", url
);
1440 if (lttng_live_connect_viewer(viewer_connection
)) {
1443 BT_LOGD("Connection to url \"%s\" is established", url
);
1444 return viewer_connection
;
1447 BT_LOGW("Failure to establish connection to url \"%s\"", url
);
1449 g_free(viewer_connection
);
1454 void bt_live_viewer_connection_destroy(struct bt_live_viewer_connection
*viewer_connection
)
1456 BT_LOGD("Closing connection to url \"%s\"", viewer_connection
->url
->str
);
1457 lttng_live_disconnect_viewer(viewer_connection
);
1458 g_string_free(viewer_connection
->url
, TRUE
);
1459 if (viewer_connection
->relay_hostname
) {
1460 g_string_free(viewer_connection
->relay_hostname
, TRUE
);
1462 if (viewer_connection
->target_hostname
) {
1463 g_string_free(viewer_connection
->target_hostname
, TRUE
);
1465 if (viewer_connection
->session_name
) {
1466 g_string_free(viewer_connection
->session_name
, TRUE
);
1468 g_free(viewer_connection
);