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>
40 #define BT_LOG_TAG "PLUGIN-CTF-LTTNG-LIVE-VIEWER"
42 #include "lttng-live-internal.h"
43 #include "viewer-connection.h"
44 #include "lttng-viewer-abi.h"
45 #include "data-stream.h"
48 static ssize_t
lttng_live_recv(int fd
, void *buf
, size_t len
)
51 size_t copied
= 0, to_copy
= len
;
54 ret
= recv(fd
, buf
+ copied
, to_copy
, 0);
56 assert(ret
<= to_copy
);
60 } while ((ret
> 0 && to_copy
> 0)
61 || (ret
< 0 && errno
== EINTR
));
64 /* ret = 0 means orderly shutdown, ret < 0 is error. */
68 static ssize_t
lttng_live_send(int fd
, const void *buf
, size_t len
)
73 ret
= bt_send_nosigpipe(fd
, buf
, len
);
74 } while (ret
< 0 && errno
== EINTR
);
79 * hostname parameter needs to hold MAXNAMLEN chars.
81 static int parse_url(struct bt_live_viewer_connection
*viewer_connection
)
83 char remain
[3][MAXNAMLEN
];
84 int ret
= -1, proto
, proto_offset
= 0;
85 const char *path
= viewer_connection
->url
->str
;
91 path_len
= strlen(path
); /* not accounting \0 */
94 * Since sscanf API does not allow easily checking string length
95 * against a size defined by a macro. Test it beforehand on the
96 * input. We know the output is always <= than the input length.
98 if (path_len
>= MAXNAMLEN
) {
101 ret
= sscanf(path
, "net%d://", &proto
);
105 proto_offset
= strlen("net://");
107 /* net4:// or net6:// */
108 proto_offset
= strlen("netX://");
110 if (proto_offset
> path_len
) {
114 BT_LOGW("IPv6 is currently unsupported by lttng-live");
117 /* TODO : parse for IPv6 as well */
118 /* Parse the hostname or IP */
119 ret
= sscanf(&path
[proto_offset
], "%[a-zA-Z.0-9%-]%s",
120 viewer_connection
->relay_hostname
, remain
[0]);
122 /* Optional port number */
123 switch (remain
[0][0]) {
125 ret
= sscanf(remain
[0], ":%d%s", &viewer_connection
->port
, remain
[1]);
126 /* Optional session ID with port number */
128 ret
= sscanf(remain
[1], "/%s", remain
[2]);
129 /* Accept 0 or 1 (optional) */
133 } else if (ret
== 0) {
134 BT_LOGW("Missing port number after delimitor ':'");
140 /* Optional session ID */
141 ret
= sscanf(remain
[0], "/%s", remain
[2]);
142 /* Accept 0 or 1 (optional) */
148 BT_LOGW("wrong delimitor : %c", remain
[0][0]);
154 if (viewer_connection
->port
< 0) {
155 viewer_connection
->port
= LTTNG_DEFAULT_NETWORK_VIEWER_PORT
;
158 if (strlen(remain
[2]) == 0) {
159 BT_LOGD("Connecting to hostname : %s, port : %d, "
161 viewer_connection
->relay_hostname
,
162 viewer_connection
->port
,
167 ret
= sscanf(remain
[2], "host/%[a-zA-Z.0-9%-]/%s",
168 viewer_connection
->target_hostname
,
169 viewer_connection
->session_name
);
172 "net://<hostname>/host/<target_hostname>/<session_name>");
176 BT_LOGD("Connecting to hostname : %s, port : %d, "
177 "target hostname : %s, session name : %s, "
179 viewer_connection
->relay_hostname
,
180 viewer_connection
->port
,
181 viewer_connection
->target_hostname
,
182 viewer_connection
->session_name
, proto
);
189 static int lttng_live_handshake(struct bt_live_viewer_connection
*viewer_connection
)
191 struct lttng_viewer_cmd cmd
;
192 struct lttng_viewer_connect connect
;
196 cmd
.cmd
= htobe32(LTTNG_VIEWER_CONNECT
);
197 cmd
.data_size
= htobe64((uint64_t) sizeof(connect
));
198 cmd
.cmd_version
= htobe32(0);
200 connect
.viewer_session_id
= -1ULL; /* will be set on recv */
201 connect
.major
= htobe32(LTTNG_LIVE_MAJOR
);
202 connect
.minor
= htobe32(LTTNG_LIVE_MINOR
);
203 connect
.type
= htobe32(LTTNG_VIEWER_CLIENT_COMMAND
);
205 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &cmd
, sizeof(cmd
));
207 BT_LOGE("Error sending cmd: %s", strerror(errno
));
210 assert(ret_len
== sizeof(cmd
));
212 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &connect
, sizeof(connect
));
214 BT_LOGE("Error sending version: %s", strerror(errno
));
217 assert(ret_len
== sizeof(connect
));
219 ret_len
= lttng_live_recv(viewer_connection
->control_sock
, &connect
, sizeof(connect
));
221 BT_LOGI("Remote side has closed connection");
225 BT_LOGE("Error receiving version: %s", strerror(errno
));
228 assert(ret_len
== sizeof(connect
));
230 BT_LOGD("Received viewer session ID : %" PRIu64
,
231 be64toh(connect
.viewer_session_id
));
232 BT_LOGD("Relayd version : %u.%u", be32toh(connect
.major
),
233 be32toh(connect
.minor
));
235 if (LTTNG_LIVE_MAJOR
!= be32toh(connect
.major
)) {
236 BT_LOGE("Incompatible lttng-relayd protocol");
239 /* Use the smallest protocol version implemented. */
240 if (LTTNG_LIVE_MINOR
> be32toh(connect
.minor
)) {
241 viewer_connection
->minor
= be32toh(connect
.minor
);
243 viewer_connection
->minor
= LTTNG_LIVE_MINOR
;
245 viewer_connection
->major
= LTTNG_LIVE_MAJOR
;
250 BT_LOGE("Unable to establish connection");
254 static int lttng_live_connect_viewer(struct bt_live_viewer_connection
*viewer_connection
)
256 struct hostent
*host
;
257 struct sockaddr_in server_addr
;
260 if (parse_url(viewer_connection
)) {
264 host
= gethostbyname(viewer_connection
->relay_hostname
);
266 BT_LOGE("Cannot lookup hostname %s",
267 viewer_connection
->relay_hostname
);
271 if ((viewer_connection
->control_sock
= socket(AF_INET
, SOCK_STREAM
, 0)) == -1) {
272 BT_LOGE("Socket creation failed: %s", strerror(errno
));
276 server_addr
.sin_family
= AF_INET
;
277 server_addr
.sin_port
= htons(viewer_connection
->port
);
278 server_addr
.sin_addr
= *((struct in_addr
*) host
->h_addr
);
279 memset(&(server_addr
.sin_zero
), 0, 8);
281 if (connect(viewer_connection
->control_sock
, (struct sockaddr
*) &server_addr
,
282 sizeof(struct sockaddr
)) == -1) {
283 BT_LOGE("Connection failed: %s", strerror(errno
));
286 if (lttng_live_handshake(viewer_connection
)) {
295 if (viewer_connection
->control_sock
>= 0) {
296 if (close(viewer_connection
->control_sock
)) {
297 BT_LOGE("Close: %s", strerror(errno
));
300 viewer_connection
->control_sock
= -1;
304 static void lttng_live_disconnect_viewer(struct bt_live_viewer_connection
*viewer_connection
)
306 if (viewer_connection
->control_sock
< 0) {
309 if (close(viewer_connection
->control_sock
)) {
310 BT_LOGE("Close: %s", strerror(errno
));
311 viewer_connection
->control_sock
= -1;
315 static void connection_release(struct bt_object
*obj
)
317 struct bt_live_viewer_connection
*conn
=
318 container_of(obj
, struct bt_live_viewer_connection
, obj
);
320 bt_live_viewer_connection_destroy(conn
);
324 enum bt_value_status
list_update_session(struct bt_value
*results
,
325 const struct lttng_viewer_session
*session
,
328 enum bt_value_status ret
= BT_VALUE_STATUS_OK
;
329 struct bt_value
*map
= NULL
;
330 struct bt_value
*hostname
= NULL
;
331 struct bt_value
*session_name
= NULL
;
332 struct bt_value
*btval
= NULL
;
336 len
= bt_value_array_size(results
);
338 ret
= BT_VALUE_STATUS_ERROR
;
341 for (i
= 0; i
< len
; i
++) {
342 const char *hostname_str
= NULL
;
343 const char *session_name_str
= NULL
;
345 map
= bt_value_array_get(results
, (size_t) i
);
347 ret
= BT_VALUE_STATUS_ERROR
;
350 hostname
= bt_value_map_get(map
, "target-hostname");
352 ret
= BT_VALUE_STATUS_ERROR
;
355 session_name
= bt_value_map_get(map
, "session-name");
357 ret
= BT_VALUE_STATUS_ERROR
;
360 ret
= bt_value_string_get(hostname
, &hostname_str
);
361 if (ret
!= BT_VALUE_STATUS_OK
) {
364 ret
= bt_value_string_get(session_name
, &session_name_str
);
365 if (ret
!= BT_VALUE_STATUS_OK
) {
369 if (!strcmp(session
->hostname
, hostname_str
)
370 && !strcmp(session
->session_name
,
373 uint32_t streams
= be32toh(session
->streams
);
374 uint32_t clients
= be32toh(session
->clients
);
378 btval
= bt_value_map_get(map
, "stream-count");
380 ret
= BT_VALUE_STATUS_ERROR
;
383 ret
= bt_value_integer_get(btval
, &val
);
384 if (ret
!= BT_VALUE_STATUS_OK
) {
389 ret
= bt_value_integer_set(btval
, val
);
390 if (ret
!= BT_VALUE_STATUS_OK
) {
395 btval
= bt_value_map_get(map
, "client-count");
397 ret
= BT_VALUE_STATUS_ERROR
;
400 ret
= bt_value_integer_get(btval
, &val
);
401 if (ret
!= BT_VALUE_STATUS_OK
) {
405 val
= max_t(int64_t, clients
, val
);
406 ret
= bt_value_integer_set(btval
, val
);
407 if (ret
!= BT_VALUE_STATUS_OK
) {
414 BT_PUT(session_name
);
424 BT_PUT(session_name
);
431 enum bt_value_status
list_append_session(struct bt_value
*results
,
433 const struct lttng_viewer_session
*session
)
435 enum bt_value_status ret
= BT_VALUE_STATUS_OK
;
436 struct bt_value
*map
= NULL
;
441 * If the session already exists, add the stream count to it,
442 * and do max of client counts.
444 ret
= list_update_session(results
, session
, &found
);
445 if (ret
!= BT_VALUE_STATUS_OK
|| found
) {
449 map
= bt_value_map_create();
451 ret
= BT_VALUE_STATUS_ERROR
;
455 if (base_url
->len
< 1) {
456 ret
= BT_VALUE_STATUS_ERROR
;
463 url
= g_string_new(base_url
->str
);
464 g_string_append(url
, "/host/");
465 g_string_append(url
, session
->hostname
);
466 g_string_append_c(url
, '/');
467 g_string_append(url
, session
->session_name
);
469 ret
= bt_value_map_insert_string(map
, "url", url
->str
);
470 if (ret
!= BT_VALUE_STATUS_OK
) {
475 * key = "target-hostname",
478 ret
= bt_value_map_insert_string(map
, "target-hostname",
480 if (ret
!= BT_VALUE_STATUS_OK
) {
485 * key = "session-name",
488 ret
= bt_value_map_insert_string(map
, "session-name",
489 session
->session_name
);
490 if (ret
!= BT_VALUE_STATUS_OK
) {
499 uint32_t live_timer
= be32toh(session
->live_timer
);
501 ret
= bt_value_map_insert_integer(map
, "timer-us",
503 if (ret
!= BT_VALUE_STATUS_OK
) {
509 * key = "stream-count",
513 uint32_t streams
= be32toh(session
->streams
);
515 ret
= bt_value_map_insert_integer(map
, "stream-count",
517 if (ret
!= BT_VALUE_STATUS_OK
) {
524 * key = "client-count",
528 uint32_t clients
= be32toh(session
->clients
);
530 ret
= bt_value_map_insert_integer(map
, "client-count",
532 if (ret
!= BT_VALUE_STATUS_OK
) {
537 ret
= bt_value_array_append(results
, map
);
540 g_string_free(url
, TRUE
);
547 * Data structure returned:
558 * key = "target-hostname",
562 * key = "session-name",
570 * key = "stream-count",
574 * key = "client-count",
583 struct bt_value
*bt_live_viewer_connection_list_sessions(struct bt_live_viewer_connection
*viewer_connection
)
585 struct bt_value
*results
= NULL
;
586 struct lttng_viewer_cmd cmd
;
587 struct lttng_viewer_list_sessions list
;
588 uint32_t i
, sessions_count
;
591 if (lttng_live_handshake(viewer_connection
)) {
595 results
= bt_value_array_create();
597 BT_LOGE("Error creating array");
601 cmd
.cmd
= htobe32(LTTNG_VIEWER_LIST_SESSIONS
);
602 cmd
.data_size
= htobe64((uint64_t) 0);
603 cmd
.cmd_version
= htobe32(0);
605 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &cmd
, sizeof(cmd
));
607 BT_LOGE("Error sending cmd: %s", strerror(errno
));
610 assert(ret_len
== sizeof(cmd
));
612 ret_len
= lttng_live_recv(viewer_connection
->control_sock
, &list
, sizeof(list
));
614 BT_LOGI("Remote side has closed connection");
618 BT_LOGE("Error receiving session list: %s", strerror(errno
));
621 assert(ret_len
== sizeof(list
));
623 sessions_count
= be32toh(list
.sessions_count
);
624 for (i
= 0; i
< sessions_count
; i
++) {
625 struct lttng_viewer_session lsession
;
627 ret_len
= lttng_live_recv(viewer_connection
->control_sock
,
628 &lsession
, sizeof(lsession
));
630 BT_LOGI("Remote side has closed connection");
634 BT_LOGE("Error receiving session: %s", strerror(errno
));
637 assert(ret_len
== sizeof(lsession
));
638 lsession
.hostname
[LTTNG_VIEWER_HOST_NAME_MAX
- 1] = '\0';
639 lsession
.session_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
640 if (list_append_session(results
,
641 viewer_connection
->url
, &lsession
)
642 != BT_VALUE_STATUS_OK
) {
654 int lttng_live_query_session_ids(struct lttng_live_component
*lttng_live
)
656 struct lttng_viewer_cmd cmd
;
657 struct lttng_viewer_list_sessions list
;
658 struct lttng_viewer_session lsession
;
659 uint32_t i
, sessions_count
;
662 struct bt_live_viewer_connection
*viewer_connection
=
663 lttng_live
->viewer_connection
;
665 cmd
.cmd
= htobe32(LTTNG_VIEWER_LIST_SESSIONS
);
666 cmd
.data_size
= htobe64((uint64_t) 0);
667 cmd
.cmd_version
= htobe32(0);
669 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &cmd
, sizeof(cmd
));
671 BT_LOGE("Error sending cmd: %s", strerror(errno
));
674 assert(ret_len
== sizeof(cmd
));
676 ret_len
= lttng_live_recv(viewer_connection
->control_sock
, &list
, sizeof(list
));
678 BT_LOGI("Remote side has closed connection");
682 BT_LOGE("Error receiving session list: %s", strerror(errno
));
685 assert(ret_len
== sizeof(list
));
687 sessions_count
= be32toh(list
.sessions_count
);
688 for (i
= 0; i
< sessions_count
; i
++) {
689 ret_len
= lttng_live_recv(viewer_connection
->control_sock
,
690 &lsession
, sizeof(lsession
));
692 BT_LOGI("Remote side has closed connection");
696 BT_LOGE("Error receiving session: %s", strerror(errno
));
699 assert(ret_len
== sizeof(lsession
));
700 lsession
.hostname
[LTTNG_VIEWER_HOST_NAME_MAX
- 1] = '\0';
701 lsession
.session_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
702 session_id
= be64toh(lsession
.id
);
704 if ((strncmp(lsession
.session_name
,
705 viewer_connection
->session_name
,
706 MAXNAMLEN
) == 0) && (strncmp(lsession
.hostname
,
707 viewer_connection
->target_hostname
,
709 if (lttng_live_add_session(lttng_live
, session_id
)) {
718 BT_LOGE("Unable to query session ids");
723 int lttng_live_create_viewer_session(struct lttng_live_component
*lttng_live
)
725 struct lttng_viewer_cmd cmd
;
726 struct lttng_viewer_create_session_response resp
;
728 struct bt_live_viewer_connection
*viewer_connection
=
729 lttng_live
->viewer_connection
;
731 cmd
.cmd
= htobe32(LTTNG_VIEWER_CREATE_SESSION
);
732 cmd
.data_size
= htobe64((uint64_t) 0);
733 cmd
.cmd_version
= htobe32(0);
735 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &cmd
, sizeof(cmd
));
737 BT_LOGE("Error sending cmd: %s", strerror(errno
));
740 assert(ret_len
== sizeof(cmd
));
742 ret_len
= lttng_live_recv(viewer_connection
->control_sock
, &resp
, sizeof(resp
));
744 BT_LOGI("Remote side has closed connection");
748 BT_LOGE("Error receiving create session reply: %s", strerror(errno
));
751 assert(ret_len
== sizeof(resp
));
753 if (be32toh(resp
.status
) != LTTNG_VIEWER_CREATE_SESSION_OK
) {
754 BT_LOGE("Error creating viewer session");
757 if (lttng_live_query_session_ids(lttng_live
)) {
768 int receive_streams(struct lttng_live_session
*session
,
769 uint32_t stream_count
)
773 struct lttng_live_component
*lttng_live
= session
->lttng_live
;
774 struct bt_live_viewer_connection
*viewer_connection
=
775 lttng_live
->viewer_connection
;
777 BT_LOGD("Getting %" PRIu32
" new streams:", stream_count
);
778 for (i
= 0; i
< stream_count
; i
++) {
779 struct lttng_viewer_stream stream
;
780 struct lttng_live_stream_iterator
*live_stream
;
782 uint64_t ctf_trace_id
;
784 ret_len
= lttng_live_recv(viewer_connection
->control_sock
, &stream
, sizeof(stream
));
786 BT_LOGI("Remote side has closed connection");
790 BT_LOGE("Error receiving stream");
793 assert(ret_len
== sizeof(stream
));
794 stream
.path_name
[LTTNG_VIEWER_PATH_MAX
- 1] = '\0';
795 stream
.channel_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
796 stream_id
= be64toh(stream
.id
);
797 ctf_trace_id
= be64toh(stream
.ctf_trace_id
);
799 if (stream
.metadata_flag
) {
800 BT_LOGD(" metadata stream %" PRIu64
" : %s/%s",
801 stream_id
, stream
.path_name
,
802 stream
.channel_name
);
803 if (lttng_live_metadata_create_stream(session
,
804 ctf_trace_id
, stream_id
)) {
805 BT_LOGE("Error creating metadata stream");
809 session
->lazy_stream_notif_init
= true;
811 BT_LOGD(" stream %" PRIu64
" : %s/%s",
812 stream_id
, stream
.path_name
,
813 stream
.channel_name
);
814 live_stream
= lttng_live_stream_iterator_create(session
,
815 ctf_trace_id
, stream_id
);
817 BT_LOGE("Error creating streamn");
829 int lttng_live_attach_session(struct lttng_live_session
*session
)
831 struct lttng_viewer_cmd cmd
;
832 struct lttng_viewer_attach_session_request rq
;
833 struct lttng_viewer_attach_session_response rp
;
835 struct lttng_live_component
*lttng_live
= session
->lttng_live
;
836 struct bt_live_viewer_connection
*viewer_connection
=
837 lttng_live
->viewer_connection
;
838 uint64_t session_id
= session
->id
;
839 uint32_t streams_count
;
841 if (session
->attached
) {
845 cmd
.cmd
= htobe32(LTTNG_VIEWER_ATTACH_SESSION
);
846 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
847 cmd
.cmd_version
= htobe32(0);
849 memset(&rq
, 0, sizeof(rq
));
850 rq
.session_id
= htobe64(session_id
);
851 // TODO: add cmd line parameter to select seek beginning
852 // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING);
853 rq
.seek
= htobe32(LTTNG_VIEWER_SEEK_LAST
);
855 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &cmd
, sizeof(cmd
));
857 BT_LOGE("Error sending cmd: %s", strerror(errno
));
860 assert(ret_len
== sizeof(cmd
));
862 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &rq
, sizeof(rq
));
864 BT_LOGE("Error sending attach request: %s", strerror(errno
));
867 assert(ret_len
== sizeof(rq
));
869 ret_len
= lttng_live_recv(viewer_connection
->control_sock
, &rp
, sizeof(rp
));
871 BT_LOGI("Remote side has closed connection");
875 BT_LOGE("Error receiving attach response: %s", strerror(errno
));
878 assert(ret_len
== sizeof(rp
));
880 streams_count
= be32toh(rp
.streams_count
);
881 switch(be32toh(rp
.status
)) {
882 case LTTNG_VIEWER_ATTACH_OK
:
884 case LTTNG_VIEWER_ATTACH_UNK
:
885 BT_LOGW("Session id %" PRIu64
" is unknown", session_id
);
887 case LTTNG_VIEWER_ATTACH_ALREADY
:
888 BT_LOGW("There is already a viewer attached to this session");
890 case LTTNG_VIEWER_ATTACH_NOT_LIVE
:
891 BT_LOGW("Not a live session");
893 case LTTNG_VIEWER_ATTACH_SEEK_ERR
:
894 BT_LOGE("Wrong seek parameter");
897 BT_LOGE("Unknown attach return code %u", be32toh(rp
.status
));
901 /* We receive the initial list of streams. */
902 if (receive_streams(session
, streams_count
)) {
906 session
->attached
= true;
907 session
->new_streams_needed
= false;
916 int lttng_live_detach_session(struct lttng_live_session
*session
)
918 struct lttng_viewer_cmd cmd
;
919 struct lttng_viewer_detach_session_request rq
;
920 struct lttng_viewer_detach_session_response rp
;
922 struct lttng_live_component
*lttng_live
= session
->lttng_live
;
923 struct bt_live_viewer_connection
*viewer_connection
=
924 lttng_live
->viewer_connection
;
925 uint64_t session_id
= session
->id
;
927 if (!session
->attached
) {
931 cmd
.cmd
= htobe32(LTTNG_VIEWER_DETACH_SESSION
);
932 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
933 cmd
.cmd_version
= htobe32(0);
935 memset(&rq
, 0, sizeof(rq
));
936 rq
.session_id
= htobe64(session_id
);
938 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &cmd
, sizeof(cmd
));
940 BT_LOGE("Error sending cmd: %s", strerror(errno
));
943 assert(ret_len
== sizeof(cmd
));
945 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &rq
, sizeof(rq
));
947 BT_LOGE("Error sending detach request: %s", strerror(errno
));
950 assert(ret_len
== sizeof(rq
));
952 ret_len
= lttng_live_recv(viewer_connection
->control_sock
, &rp
, sizeof(rp
));
954 BT_LOGI("Remote side has closed connection");
958 BT_LOGE("Error receiving detach response: %s", strerror(errno
));
961 assert(ret_len
== sizeof(rp
));
963 switch(be32toh(rp
.status
)) {
964 case LTTNG_VIEWER_DETACH_SESSION_OK
:
966 case LTTNG_VIEWER_DETACH_SESSION_UNK
:
967 BT_LOGW("Session id %" PRIu64
" is unknown", session_id
);
969 case LTTNG_VIEWER_DETACH_SESSION_ERR
:
970 BT_LOGW("Error detaching session id %" PRIu64
"", session_id
);
973 BT_LOGE("Unknown detach return code %u", be32toh(rp
.status
));
977 session
->attached
= false;
986 ssize_t
lttng_live_get_one_metadata_packet(struct lttng_live_trace
*trace
,
991 struct lttng_viewer_cmd cmd
;
992 struct lttng_viewer_get_metadata rq
;
993 struct lttng_viewer_metadata_packet rp
;
996 struct lttng_live_session
*session
= trace
->session
;
997 struct lttng_live_component
*lttng_live
= session
->lttng_live
;
998 struct lttng_live_metadata
*metadata
= trace
->metadata
;
999 struct bt_live_viewer_connection
*viewer_connection
=
1000 lttng_live
->viewer_connection
;
1002 rq
.stream_id
= htobe64(metadata
->stream_id
);
1003 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_METADATA
);
1004 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1005 cmd
.cmd_version
= htobe32(0);
1007 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &cmd
, sizeof(cmd
));
1009 BT_LOGE("Error sending cmd: %s", strerror(errno
));
1012 assert(ret_len
== sizeof(cmd
));
1014 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &rq
, sizeof(rq
));
1016 BT_LOGE("Error sending get_metadata request: %s", strerror(errno
));
1019 assert(ret_len
== sizeof(rq
));
1021 ret_len
= lttng_live_recv(viewer_connection
->control_sock
, &rp
, sizeof(rp
));
1023 BT_LOGI("Remote side has closed connection");
1027 BT_LOGE("Error receiving get_metadata response: %s", strerror(errno
));
1030 assert(ret_len
== sizeof(rp
));
1032 switch (be32toh(rp
.status
)) {
1033 case LTTNG_VIEWER_METADATA_OK
:
1034 BT_LOGD("get_metadata : OK");
1036 case LTTNG_VIEWER_NO_NEW_METADATA
:
1037 BT_LOGD("get_metadata : NO NEW");
1040 case LTTNG_VIEWER_METADATA_ERR
:
1041 BT_LOGD("get_metadata : ERR");
1044 BT_LOGD("get_metadata : UNKNOWN");
1048 len
= be64toh(rp
.len
);
1049 BT_LOGD("Writing %" PRIu64
" bytes to metadata", len
);
1054 data
= zmalloc(len
);
1056 BT_LOGE("relay data zmalloc: %s", strerror(errno
));
1059 ret_len
= lttng_live_recv(viewer_connection
->control_sock
, data
, len
);
1061 BT_LOGI("Remote side has closed connection");
1062 goto error_free_data
;
1065 BT_LOGE("Error receiving trace packet: %s", strerror(errno
));
1066 goto error_free_data
;
1068 assert(ret_len
== len
);
1071 ret_len
= fwrite(data
, 1, len
, fp
);
1072 } while (ret_len
< 0 && errno
== EINTR
);
1074 BT_LOGE("Writing in the metadata fp");
1075 goto error_free_data
;
1077 assert(ret_len
== len
);
1090 * Assign the fields from a lttng_viewer_index to a packet_index.
1093 void lttng_index_to_packet_index(struct lttng_viewer_index
*lindex
,
1094 struct packet_index
*pindex
)
1099 pindex
->offset
= be64toh(lindex
->offset
);
1100 pindex
->packet_size
= be64toh(lindex
->packet_size
);
1101 pindex
->content_size
= be64toh(lindex
->content_size
);
1102 pindex
->ts_cycles
.timestamp_begin
= be64toh(lindex
->timestamp_begin
);
1103 pindex
->ts_cycles
.timestamp_end
= be64toh(lindex
->timestamp_end
);
1104 pindex
->events_discarded
= be64toh(lindex
->events_discarded
);
1108 enum bt_ctf_lttng_live_iterator_status
lttng_live_get_next_index(struct lttng_live_component
*lttng_live
,
1109 struct lttng_live_stream_iterator
*stream
,
1110 struct packet_index
*index
)
1112 struct lttng_viewer_cmd cmd
;
1113 struct lttng_viewer_get_next_index rq
;
1115 struct lttng_viewer_index rp
;
1116 uint32_t flags
, status
;
1117 enum bt_ctf_lttng_live_iterator_status retstatus
=
1118 BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK
;
1119 struct bt_live_viewer_connection
*viewer_connection
=
1120 lttng_live
->viewer_connection
;
1121 struct lttng_live_trace
*trace
= stream
->trace
;
1123 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_NEXT_INDEX
);
1124 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1125 cmd
.cmd_version
= htobe32(0);
1127 memset(&rq
, 0, sizeof(rq
));
1128 rq
.stream_id
= htobe64(stream
->viewer_stream_id
);
1130 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &cmd
, sizeof(cmd
));
1132 BT_LOGE("Error sending cmd: %s", strerror(errno
));
1135 assert(ret_len
== sizeof(cmd
));
1137 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &rq
, sizeof(rq
));
1139 BT_LOGE("Error sending get_next_index request: %s", strerror(errno
));
1142 assert(ret_len
== sizeof(rq
));
1144 ret_len
= lttng_live_recv(viewer_connection
->control_sock
, &rp
, sizeof(rp
));
1146 BT_LOGI("Remote side has closed connection");
1150 BT_LOGE("Error receiving get_next_index response: %s", strerror(errno
));
1153 assert(ret_len
== sizeof(rp
));
1155 flags
= be32toh(rp
.flags
);
1156 status
= be32toh(rp
.status
);
1159 case LTTNG_VIEWER_INDEX_INACTIVE
:
1161 uint64_t ctf_stream_class_id
;
1163 BT_LOGD("get_next_index: inactive");
1164 memset(index
, 0, sizeof(struct packet_index
));
1165 index
->ts_cycles
.timestamp_end
= be64toh(rp
.timestamp_end
);
1166 stream
->current_inactivity_timestamp
= index
->ts_cycles
.timestamp_end
;
1167 ctf_stream_class_id
= be64toh(rp
.stream_id
);
1168 if (stream
->ctf_stream_class_id
!= -1ULL) {
1169 assert(stream
->ctf_stream_class_id
==
1170 ctf_stream_class_id
);
1172 stream
->ctf_stream_class_id
= ctf_stream_class_id
;
1174 stream
->state
= LTTNG_LIVE_STREAM_QUIESCENT
;
1177 case LTTNG_VIEWER_INDEX_OK
:
1179 uint64_t ctf_stream_class_id
;
1181 BT_LOGD("get_next_index: OK");
1182 lttng_index_to_packet_index(&rp
, index
);
1183 ctf_stream_class_id
= be64toh(rp
.stream_id
);
1184 if (stream
->ctf_stream_class_id
!= -1ULL) {
1185 assert(stream
->ctf_stream_class_id
==
1186 ctf_stream_class_id
);
1188 stream
->ctf_stream_class_id
= ctf_stream_class_id
;
1191 stream
->state
= LTTNG_LIVE_STREAM_ACTIVE_DATA
;
1192 stream
->current_packet_end_timestamp
=
1193 index
->ts_cycles
.timestamp_end
;
1195 if (flags
& LTTNG_VIEWER_FLAG_NEW_METADATA
) {
1196 BT_LOGD("get_next_index: new metadata needed");
1197 trace
->new_metadata_needed
= true;
1199 if (flags
& LTTNG_VIEWER_FLAG_NEW_STREAM
) {
1200 BT_LOGD("get_next_index: new streams needed");
1201 lttng_live_need_new_streams(lttng_live
);
1205 case LTTNG_VIEWER_INDEX_RETRY
:
1206 BT_LOGD("get_next_index: retry");
1207 memset(index
, 0, sizeof(struct packet_index
));
1208 retstatus
= BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN
;
1209 stream
->state
= LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
;
1211 case LTTNG_VIEWER_INDEX_HUP
:
1212 BT_LOGD("get_next_index: stream hung up");
1213 memset(index
, 0, sizeof(struct packet_index
));
1214 index
->offset
= EOF
;
1215 retstatus
= BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END
;
1216 stream
->state
= LTTNG_LIVE_STREAM_EOF
;
1218 case LTTNG_VIEWER_INDEX_ERR
:
1219 BT_LOGE("get_next_index: error");
1220 memset(index
, 0, sizeof(struct packet_index
));
1221 stream
->state
= LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
;
1224 BT_LOGE("get_next_index: unknown value");
1225 memset(index
, 0, sizeof(struct packet_index
));
1226 stream
->state
= LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
;
1233 retstatus
= BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
1238 enum bt_ctf_notif_iter_medium_status
lttng_live_get_stream_bytes(struct lttng_live_component
*lttng_live
,
1239 struct lttng_live_stream_iterator
*stream
, uint8_t *buf
, uint64_t offset
,
1240 uint64_t req_len
, uint64_t *recv_len
)
1242 enum bt_ctf_notif_iter_medium_status retstatus
= BT_CTF_NOTIF_ITER_MEDIUM_STATUS_OK
;
1243 struct lttng_viewer_cmd cmd
;
1244 struct lttng_viewer_get_packet rq
;
1245 struct lttng_viewer_trace_packet rp
;
1247 uint32_t flags
, status
;
1248 struct bt_live_viewer_connection
*viewer_connection
=
1249 lttng_live
->viewer_connection
;
1250 struct lttng_live_trace
*trace
= stream
->trace
;
1252 BT_LOGD("lttng_live_get_stream_bytes: offset=%" PRIu64
", req_len=%" PRIu64
,
1254 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_PACKET
);
1255 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1256 cmd
.cmd_version
= htobe32(0);
1258 memset(&rq
, 0, sizeof(rq
));
1259 rq
.stream_id
= htobe64(stream
->viewer_stream_id
);
1260 rq
.offset
= htobe64(offset
);
1261 rq
.len
= htobe32(req_len
);
1263 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &cmd
, sizeof(cmd
));
1265 BT_LOGE("Error sending cmd: %s", strerror(errno
));
1268 assert(ret_len
== sizeof(cmd
));
1270 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &rq
, sizeof(rq
));
1272 BT_LOGE("Error sending get_data request: %s", strerror(errno
));
1275 assert(ret_len
== sizeof(rq
));
1277 ret_len
= lttng_live_recv(viewer_connection
->control_sock
, &rp
, sizeof(rp
));
1279 BT_LOGI("Remote side has closed connection");
1283 BT_LOGE("Error receiving get_data response: %s", strerror(errno
));
1286 if (ret_len
!= sizeof(rp
)) {
1287 BT_LOGE("get_data_packet: expected %zu"
1288 ", received %zd", sizeof(rp
),
1293 flags
= be32toh(rp
.flags
);
1294 status
= be32toh(rp
.status
);
1297 case LTTNG_VIEWER_GET_PACKET_OK
:
1298 req_len
= be32toh(rp
.len
);
1299 BT_LOGD("get_data_packet: Ok, packet size : %" PRIu64
"", req_len
);
1301 case LTTNG_VIEWER_GET_PACKET_RETRY
:
1302 /* Unimplemented by relay daemon */
1303 BT_LOGD("get_data_packet: retry");
1304 retstatus
= BT_CTF_NOTIF_ITER_MEDIUM_STATUS_AGAIN
;
1306 case LTTNG_VIEWER_GET_PACKET_ERR
:
1307 if (flags
& LTTNG_VIEWER_FLAG_NEW_METADATA
) {
1308 BT_LOGD("get_data_packet: new metadata needed, try again later");
1309 trace
->new_metadata_needed
= true;
1311 if (flags
& LTTNG_VIEWER_FLAG_NEW_STREAM
) {
1312 BT_LOGD("get_data_packet: new streams needed, try again later");
1313 lttng_live_need_new_streams(lttng_live
);
1315 if (flags
& (LTTNG_VIEWER_FLAG_NEW_METADATA
1316 | LTTNG_VIEWER_FLAG_NEW_STREAM
)) {
1317 retstatus
= BT_CTF_NOTIF_ITER_MEDIUM_STATUS_AGAIN
;
1320 BT_LOGE("get_data_packet: error");
1322 case LTTNG_VIEWER_GET_PACKET_EOF
:
1323 retstatus
= BT_CTF_NOTIF_ITER_MEDIUM_STATUS_EOF
;
1326 BT_LOGE("get_data_packet: unknown");
1334 ret_len
= lttng_live_recv(viewer_connection
->control_sock
, buf
, req_len
);
1336 BT_LOGI("Remote side has closed connection");
1340 BT_LOGE("Error receiving trace packet: %s", strerror(errno
));
1343 assert(ret_len
== req_len
);
1344 *recv_len
= ret_len
;
1349 retstatus
= BT_CTF_NOTIF_ITER_MEDIUM_STATUS_ERROR
;
1354 * Request new streams for a session.
1357 enum bt_ctf_lttng_live_iterator_status
lttng_live_get_new_streams(
1358 struct lttng_live_session
*session
)
1360 enum bt_ctf_lttng_live_iterator_status status
=
1361 BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK
;
1362 struct lttng_viewer_cmd cmd
;
1363 struct lttng_viewer_new_streams_request rq
;
1364 struct lttng_viewer_new_streams_response rp
;
1366 struct lttng_live_component
*lttng_live
= session
->lttng_live
;
1367 struct bt_live_viewer_connection
*viewer_connection
=
1368 lttng_live
->viewer_connection
;
1369 uint32_t streams_count
;
1371 if (!session
->new_streams_needed
) {
1372 return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK
;
1375 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_NEW_STREAMS
);
1376 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1377 cmd
.cmd_version
= htobe32(0);
1379 memset(&rq
, 0, sizeof(rq
));
1380 rq
.session_id
= htobe64(session
->id
);
1382 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &cmd
, sizeof(cmd
));
1384 BT_LOGE("Error sending cmd: %s", strerror(errno
));
1387 assert(ret_len
== sizeof(cmd
));
1389 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &rq
, sizeof(rq
));
1391 BT_LOGE("Error sending get_new_streams request: %s", strerror(errno
));
1394 assert(ret_len
== sizeof(rq
));
1396 ret_len
= lttng_live_recv(viewer_connection
->control_sock
, &rp
, sizeof(rp
));
1398 BT_LOGI("Remote side has closed connection");
1402 BT_LOGE("Error receiving get_new_streams response");
1405 assert(ret_len
== sizeof(rp
));
1407 streams_count
= be32toh(rp
.streams_count
);
1409 switch(be32toh(rp
.status
)) {
1410 case LTTNG_VIEWER_NEW_STREAMS_OK
:
1411 session
->new_streams_needed
= false;
1413 case LTTNG_VIEWER_NEW_STREAMS_NO_NEW
:
1414 session
->new_streams_needed
= false;
1416 case LTTNG_VIEWER_NEW_STREAMS_HUP
:
1417 session
->new_streams_needed
= false;
1418 session
->closed
= true;
1419 status
= BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END
;
1421 case LTTNG_VIEWER_NEW_STREAMS_ERR
:
1422 BT_LOGE("get_new_streams error");
1425 BT_LOGE("Unknown return code %u", be32toh(rp
.status
));
1429 if (receive_streams(session
, streams_count
)) {
1436 status
= BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
1441 struct bt_live_viewer_connection
*
1442 bt_live_viewer_connection_create(const char *url
, FILE *error_fp
)
1444 struct bt_live_viewer_connection
*viewer_connection
;
1446 viewer_connection
= g_new0(struct bt_live_viewer_connection
, 1);
1448 bt_object_init(&viewer_connection
->obj
, connection_release
);
1449 viewer_connection
->control_sock
= -1;
1450 viewer_connection
->port
= -1;
1451 viewer_connection
->error_fp
= error_fp
;
1452 viewer_connection
->url
= g_string_new(url
);
1453 if (!viewer_connection
->url
) {
1457 BT_LOGD("Establishing connection to url \"%s\"...", url
);
1458 if (lttng_live_connect_viewer(viewer_connection
)) {
1461 BT_LOGD("Connection to url \"%s\" is established", url
);
1462 return viewer_connection
;
1465 BT_LOGW("Failure to establish connection to url \"%s\"", url
);
1467 g_free(viewer_connection
);
1472 void bt_live_viewer_connection_destroy(struct bt_live_viewer_connection
*viewer_connection
)
1474 BT_LOGD("Closing connection to url \"%s\"", viewer_connection
->url
->str
);
1475 lttng_live_disconnect_viewer(viewer_connection
);
1476 g_string_free(viewer_connection
->url
, TRUE
);
1477 g_free(viewer_connection
);