2 * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com>
3 * 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 #include <sys/socket.h>
25 #include <sys/types.h>
26 #include <netinet/in.h>
37 #include <babeltrace/ctf/ctf-index.h>
39 #include <babeltrace/babeltrace.h>
40 #include <babeltrace/ctf/events.h>
41 #include <babeltrace/ctf/callbacks.h>
42 #include <babeltrace/ctf/iterator.h>
44 /* for packet_index */
45 #include <babeltrace/ctf/types.h>
47 #include <babeltrace/ctf/metadata.h>
48 #include <babeltrace/ctf-text/types.h>
49 #include <babeltrace/ctf/events-internal.h>
51 #include <formats/ctf/events-private.h>
54 #include "network-live.h"
56 #include "liblttng-live.h"
57 #include "lttng-viewer.h"
61 * Memory allocation zeroed
63 #define zmalloc(x) calloc(1, x)
66 #define max_t(type, a, b) \
67 ((type) (a) > (type) (b) ? (type) (a) : (type) (b))
70 int lttng_live_connect_viewer(struct lttng_live_ctx
*ctx
, char *hostname
,
74 struct sockaddr_in server_addr
;
77 host
= gethostbyname(hostname
);
83 if ((ctx
->control_sock
= socket(AF_INET
, SOCK_STREAM
, 0)) == -1) {
89 server_addr
.sin_family
= AF_INET
;
90 server_addr
.sin_port
= htons(port
);
91 server_addr
.sin_addr
= *((struct in_addr
*) host
->h_addr
);
92 bzero(&(server_addr
.sin_zero
), 8);
94 if (connect(ctx
->control_sock
, (struct sockaddr
*) &server_addr
,
95 sizeof(struct sockaddr
)) == -1) {
107 int lttng_live_establish_connection(struct lttng_live_ctx
*ctx
)
109 struct lttng_viewer_cmd cmd
;
110 struct lttng_viewer_connect connect
;
114 cmd
.cmd
= htobe32(LTTNG_VIEWER_CONNECT
);
115 cmd
.data_size
= sizeof(connect
);
118 connect
.viewer_session_id
= -1ULL; /* will be set on recv */
119 connect
.major
= htobe32(LTTNG_LIVE_MAJOR
);
120 connect
.minor
= htobe32(LTTNG_LIVE_MINOR
);
121 connect
.type
= htobe32(LTTNG_VIEWER_CLIENT_COMMAND
);
124 ret_len
= send(ctx
->control_sock
, &cmd
, sizeof(cmd
), 0);
125 } while (ret_len
< 0 && errno
== EINTR
);
127 fprintf(stderr
, "[error] Error sending cmd\n");
131 assert(ret_len
== sizeof(cmd
));
134 ret_len
= send(ctx
->control_sock
, &connect
, sizeof(connect
), 0);
135 } while (ret_len
< 0 && errno
== EINTR
);
137 fprintf(stderr
, "[error] Error sending version\n");
141 assert(ret_len
== sizeof(connect
));
144 ret_len
= recv(ctx
->control_sock
, &connect
, sizeof(connect
), 0);
145 } while (ret_len
< 0 && errno
== EINTR
);
147 fprintf(stderr
, "[error] Error receiving version\n");
151 assert(ret_len
== sizeof(connect
));
153 printf_verbose("Received viewer session ID : %" PRIu64
"\n",
154 be64toh(connect
.viewer_session_id
));
155 printf_verbose("Relayd version : %u.%u\n", be32toh(connect
.major
),
156 be32toh(connect
.minor
));
164 int lttng_live_list_sessions(struct lttng_live_ctx
*ctx
, const char *path
)
166 struct lttng_viewer_cmd cmd
;
167 struct lttng_viewer_list_sessions list
;
168 struct lttng_viewer_session lsession
;
173 cmd
.cmd
= htobe32(LTTNG_VIEWER_LIST_SESSIONS
);
178 ret_len
= send(ctx
->control_sock
, &cmd
, sizeof(cmd
), 0);
179 } while (ret_len
< 0 && errno
== EINTR
);
181 fprintf(stderr
, "[error] Error sending cmd\n");
185 assert(ret_len
== sizeof(cmd
));
188 ret_len
= recv(ctx
->control_sock
, &list
, sizeof(list
), 0);
189 } while (ret_len
< 0 && errno
== EINTR
);
191 fprintf(stderr
, "[error] Error receiving session list\n");
195 assert(ret_len
== sizeof(list
));
197 sessions_count
= be32toh(list
.sessions_count
);
198 fprintf(stdout
, "%u active session(s)%c\n", sessions_count
,
199 sessions_count
> 0 ? ':' : ' ');
200 for (i
= 0; i
< sessions_count
; i
++) {
202 ret_len
= recv(ctx
->control_sock
, &lsession
, sizeof(lsession
), 0);
203 } while (ret_len
< 0 && errno
== EINTR
);
205 fprintf(stderr
, "[error] Error receiving session\n");
209 assert(ret_len
== sizeof(lsession
));
210 lsession
.hostname
[LTTNG_VIEWER_HOST_NAME_MAX
- 1] = '\0';
211 lsession
.session_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
213 fprintf(stdout
, "%s/%" PRIu64
" : %s on host %s (timer = %u, "
214 "%u stream(s), %u client(s) connected)\n",
215 path
, be64toh(lsession
.id
),
216 lsession
.session_name
, lsession
.hostname
,
217 be32toh(lsession
.live_timer
),
218 be32toh(lsession
.streams
),
219 be32toh(lsession
.clients
));
228 int lttng_live_ctf_trace_assign(struct lttng_live_viewer_stream
*stream
,
229 uint64_t ctf_trace_id
)
231 struct lttng_live_ctf_trace
*trace
;
234 trace
= g_hash_table_lookup(stream
->session
->ctf_traces
,
235 (gpointer
) ctf_trace_id
);
237 trace
= g_new0(struct lttng_live_ctf_trace
, 1);
238 trace
->ctf_trace_id
= ctf_trace_id
;
239 trace
->streams
= g_ptr_array_new();
240 g_hash_table_insert(stream
->session
->ctf_traces
,
241 (gpointer
) ctf_trace_id
,
244 if (stream
->metadata_flag
)
245 trace
->metadata_stream
= stream
;
247 stream
->ctf_trace
= trace
;
248 g_ptr_array_add(trace
->streams
, stream
);
253 int lttng_live_attach_session(struct lttng_live_ctx
*ctx
, uint64_t id
)
255 struct lttng_viewer_cmd cmd
;
256 struct lttng_viewer_attach_session_request rq
;
257 struct lttng_viewer_attach_session_response rp
;
258 struct lttng_viewer_stream stream
;
262 cmd
.cmd
= htobe32(LTTNG_VIEWER_ATTACH_SESSION
);
263 cmd
.data_size
= sizeof(rq
);
266 memset(&rq
, 0, sizeof(rq
));
267 rq
.session_id
= htobe64(id
);
268 // TODO: add cmd line parameter to select seek beginning
269 // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING);
270 rq
.seek
= htobe32(LTTNG_VIEWER_SEEK_LAST
);
273 ret_len
= send(ctx
->control_sock
, &cmd
, sizeof(cmd
), 0);
274 } while (ret_len
< 0 && errno
== EINTR
);
276 fprintf(stderr
, "[error] Error sending cmd\n");
280 assert(ret_len
== sizeof(cmd
));
283 ret_len
= send(ctx
->control_sock
, &rq
, sizeof(rq
), 0);
284 } while (ret_len
< 0 && errno
== EINTR
);
286 fprintf(stderr
, "[error] Error sending attach request\n");
290 assert(ret_len
== sizeof(rq
));
293 ret_len
= recv(ctx
->control_sock
, &rp
, sizeof(rp
), 0);
294 } while (ret_len
< 0 && errno
== EINTR
);
296 fprintf(stderr
, "[error] Error receiving attach response\n");
300 assert(ret_len
== sizeof(rp
));
302 switch(be32toh(rp
.status
)) {
303 case LTTNG_VIEWER_ATTACH_OK
:
305 case LTTNG_VIEWER_ATTACH_UNK
:
306 ret
= -LTTNG_VIEWER_ATTACH_UNK
;
308 case LTTNG_VIEWER_ATTACH_ALREADY
:
309 fprintf(stderr
, "[error] Already a viewer attached\n");
312 case LTTNG_VIEWER_ATTACH_NOT_LIVE
:
313 fprintf(stderr
, "[error] Not a live session\n");
316 case LTTNG_VIEWER_ATTACH_SEEK_ERR
:
317 fprintf(stderr
, "[error] Wrong seek parameter\n");
321 fprintf(stderr
, "[error] Unknown attach return code %u\n",
326 if (be32toh(rp
.status
) != LTTNG_VIEWER_ATTACH_OK
) {
331 ctx
->session
->stream_count
= be32toh(rp
.streams_count
);
333 * When the session is created but not started, we do an active wait
334 * until it starts. It allows the viewer to start processing the trace
335 * as soon as the session starts.
337 if (ctx
->session
->stream_count
== 0) {
341 printf_verbose("Waiting for %" PRIu64
" streams:\n",
342 ctx
->session
->stream_count
);
343 ctx
->session
->streams
= g_new0(struct lttng_live_viewer_stream
,
344 ctx
->session
->stream_count
);
345 for (i
= 0; i
< be32toh(rp
.streams_count
); i
++) {
347 ret_len
= recv(ctx
->control_sock
, &stream
, sizeof(stream
), 0);
348 } while (ret_len
< 0 && errno
== EINTR
);
350 fprintf(stderr
, "[error] Error receiving stream\n");
354 assert(ret_len
== sizeof(stream
));
355 stream
.path_name
[LTTNG_VIEWER_PATH_MAX
- 1] = '\0';
356 stream
.channel_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
358 printf_verbose(" stream %" PRIu64
" : %s/%s\n",
359 be64toh(stream
.id
), stream
.path_name
,
360 stream
.channel_name
);
361 ctx
->session
->streams
[i
].id
= be64toh(stream
.id
);
362 ctx
->session
->streams
[i
].session
= ctx
->session
;
364 ctx
->session
->streams
[i
].first_read
= 1;
365 ctx
->session
->streams
[i
].mmap_size
= 0;
367 if (be32toh(stream
.metadata_flag
)) {
370 path
= strdup(LTTNG_METADATA_PATH_TEMPLATE
);
376 if (!mkdtemp(path
)) {
382 ctx
->session
->streams
[i
].metadata_flag
= 1;
383 snprintf(ctx
->session
->streams
[i
].path
,
384 sizeof(ctx
->session
->streams
[i
].path
),
386 stream
.channel_name
);
387 ret
= open(ctx
->session
->streams
[i
].path
,
388 O_WRONLY
| O_CREAT
| O_TRUNC
,
389 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
);
395 ctx
->session
->streams
[i
].fd
= ret
;
398 ret
= lttng_live_ctf_trace_assign(&ctx
->session
->streams
[i
],
399 be64toh(stream
.ctf_trace_id
));
413 int get_data_packet(struct lttng_live_ctx
*ctx
,
414 struct ctf_stream_pos
*pos
,
415 struct lttng_live_viewer_stream
*stream
, uint64_t offset
,
418 struct lttng_viewer_cmd cmd
;
419 struct lttng_viewer_get_packet rq
;
420 struct lttng_viewer_trace_packet rp
;
424 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_PACKET
);
425 cmd
.data_size
= sizeof(rq
);
428 memset(&rq
, 0, sizeof(rq
));
429 rq
.stream_id
= htobe64(stream
->id
);
430 /* Already in big endian. */
432 rq
.len
= htobe32(len
);
435 ret_len
= send(ctx
->control_sock
, &cmd
, sizeof(cmd
), 0);
436 } while (ret_len
< 0 && errno
== EINTR
);
438 fprintf(stderr
, "[error] Error sending cmd\n");
442 assert(ret_len
== sizeof(cmd
));
445 ret_len
= send(ctx
->control_sock
, &rq
, sizeof(rq
), 0);
446 } while (ret_len
< 0 && errno
== EINTR
);
448 fprintf(stderr
, "[error] Error sending get_data_packet request\n");
452 assert(ret_len
== sizeof(rq
));
455 ret_len
= recv(ctx
->control_sock
, &rp
, sizeof(rp
), 0);
456 } while (ret_len
< 0 && errno
== EINTR
);
458 fprintf(stderr
, "[error] Error receiving data response\n");
462 if (ret_len
!= sizeof(rp
)) {
463 fprintf(stderr
, "[error] get_data_packet: expected %" PRId64
464 ", received %" PRId64
"\n", ret_len
,
470 rp
.flags
= be32toh(rp
.flags
);
472 switch (be32toh(rp
.status
)) {
473 case LTTNG_VIEWER_GET_PACKET_OK
:
474 len
= be32toh(rp
.len
);
475 printf_verbose("get_data_packet: Ok, packet size : %" PRIu64
478 case LTTNG_VIEWER_GET_PACKET_RETRY
:
479 printf_verbose("get_data_packet: retry\n");
482 case LTTNG_VIEWER_GET_PACKET_ERR
:
483 if (rp
.flags
& LTTNG_VIEWER_FLAG_NEW_METADATA
) {
484 printf_verbose("get_data_packet: new metadata needed\n");
488 fprintf(stderr
, "[error] get_data_packet: error\n");
491 case LTTNG_VIEWER_GET_PACKET_EOF
:
495 printf_verbose("get_data_packet: unknown\n");
506 if (len
> stream
->mmap_size
) {
509 new_size
= max_t(uint64_t, len
, stream
->mmap_size
<< 1);
512 ret
= munmap_align(pos
->base_mma
);
514 fprintf(stderr
, "[error] Unable to unmap old base: %s.\n",
519 pos
->base_mma
= NULL
;
521 pos
->base_mma
= mmap_align(new_size
,
522 PROT_READ
| PROT_WRITE
,
523 MAP_PRIVATE
| MAP_ANONYMOUS
, -1, 0);
524 if (pos
->base_mma
== MAP_FAILED
) {
525 fprintf(stderr
, "[error] mmap error %s.\n",
527 pos
->base_mma
= NULL
;
532 stream
->mmap_size
= new_size
;
533 printf_verbose("Expanding stream mmap size to %" PRIu64
" bytes\n",
538 ret_len
= recv(ctx
->control_sock
,
539 mmap_align_addr(pos
->base_mma
), len
,
541 } while (ret_len
< 0 && errno
== EINTR
);
543 fprintf(stderr
, "[error] Error receiving trace packet\n");
547 assert(ret_len
== len
);
555 * Return number of metadata bytes written or a negative value on error.
558 int get_new_metadata(struct lttng_live_ctx
*ctx
,
559 struct lttng_live_viewer_stream
*viewer_stream
,
560 uint64_t *metadata_len
)
564 struct lttng_viewer_cmd cmd
;
565 struct lttng_viewer_get_metadata rq
;
566 struct lttng_viewer_metadata_packet rp
;
567 struct lttng_live_viewer_stream
*metadata_stream
;
571 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_METADATA
);
572 cmd
.data_size
= sizeof(rq
);
575 metadata_stream
= viewer_stream
->ctf_trace
->metadata_stream
;
576 rq
.stream_id
= htobe64(metadata_stream
->id
);
579 ret_len
= send(ctx
->control_sock
, &cmd
, sizeof(cmd
), 0);
580 } while (ret_len
< 0 && errno
== EINTR
);
582 fprintf(stderr
, "[error] Error sending cmd\n");
586 assert(ret_len
== sizeof(cmd
));
589 ret_len
= send(ctx
->control_sock
, &rq
, sizeof(rq
), 0);
590 } while (ret_len
< 0 && errno
== EINTR
);
592 fprintf(stderr
, "[error] Error sending get_metadata request\n");
596 assert(ret_len
== sizeof(rq
));
599 ret_len
= recv(ctx
->control_sock
, &rp
, sizeof(rp
), 0);
600 } while (ret_len
< 0 && errno
== EINTR
);
602 fprintf(stderr
, "[error] Error receiving metadata response\n");
606 assert(ret_len
== sizeof(rp
));
608 switch (be32toh(rp
.status
)) {
609 case LTTNG_VIEWER_METADATA_OK
:
610 printf_verbose("get_metadata : OK\n");
612 case LTTNG_VIEWER_NO_NEW_METADATA
:
613 printf_verbose("get_metadata : NO NEW\n");
616 case LTTNG_VIEWER_METADATA_ERR
:
617 printf_verbose("get_metadata : ERR\n");
621 printf_verbose("get_metadata : UNKNOWN\n");
626 len
= be64toh(rp
.len
);
627 printf_verbose("Writing %" PRIu64
" bytes to metadata\n", len
);
635 perror("relay data zmalloc");
640 ret_len
= recv(ctx
->control_sock
, data
, len
, MSG_WAITALL
);
641 } while (ret_len
< 0 && errno
== EINTR
);
643 fprintf(stderr
, "[error] Error receiving trace packet\n");
648 assert(ret_len
== len
);
651 ret_len
= write(metadata_stream
->fd
, data
, len
);
652 } while (ret_len
< 0 && errno
== EINTR
);
658 assert(ret_len
== len
);
670 * Get one index for a stream.
672 * Returns 0 on success or a negative value on error.
675 int get_next_index(struct lttng_live_ctx
*ctx
,
676 struct lttng_live_viewer_stream
*viewer_stream
,
677 struct packet_index
*index
)
679 struct lttng_viewer_cmd cmd
;
680 struct lttng_viewer_get_next_index rq
;
681 struct lttng_viewer_index rp
;
683 uint64_t metadata_len
;
686 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_NEXT_INDEX
);
687 cmd
.data_size
= sizeof(rq
);
690 memset(&rq
, 0, sizeof(rq
));
691 rq
.stream_id
= htobe64(viewer_stream
->id
);
695 ret_len
= send(ctx
->control_sock
, &cmd
, sizeof(cmd
), 0);
696 } while (ret_len
< 0 && errno
== EINTR
);
698 fprintf(stderr
, "[error] Error sending cmd\n");
702 assert(ret_len
== sizeof(cmd
));
705 ret_len
= send(ctx
->control_sock
, &rq
, sizeof(rq
), 0);
706 } while (ret_len
< 0 && errno
== EINTR
);
708 fprintf(stderr
, "[error] Error sending get_next_index request\n");
712 assert(ret_len
== sizeof(rq
));
715 ret_len
= recv(ctx
->control_sock
, &rp
, sizeof(rp
), 0);
716 } while (ret_len
< 0 && errno
== EINTR
);
718 fprintf(stderr
, "[error] Error receiving index response\n");
722 assert(ret_len
== sizeof(rp
));
724 rp
.flags
= be32toh(rp
.flags
);
726 switch (be32toh(rp
.status
)) {
727 case LTTNG_VIEWER_INDEX_INACTIVE
:
728 printf_verbose("get_next_index: inactive\n");
729 memset(index
, 0, sizeof(struct packet_index
));
730 index
->timestamp_end
= be64toh(rp
.timestamp_end
);
732 case LTTNG_VIEWER_INDEX_OK
:
733 printf_verbose("get_next_index: Ok, need metadata update : %u\n",
734 rp
.flags
& LTTNG_VIEWER_FLAG_NEW_METADATA
);
735 index
->offset
= be64toh(rp
.offset
);
736 index
->packet_size
= be64toh(rp
.packet_size
);
737 index
->content_size
= be64toh(rp
.content_size
);
738 index
->timestamp_begin
= be64toh(rp
.timestamp_begin
);
739 index
->timestamp_end
= be64toh(rp
.timestamp_end
);
740 index
->events_discarded
= be64toh(rp
.events_discarded
);
742 if (rp
.flags
& LTTNG_VIEWER_FLAG_NEW_METADATA
) {
743 printf_verbose("get_next_index: new metadata needed\n");
744 ret
= get_new_metadata(ctx
, viewer_stream
,
751 case LTTNG_VIEWER_INDEX_RETRY
:
752 printf_verbose("get_next_index: retry\n");
755 case LTTNG_VIEWER_INDEX_HUP
:
756 printf_verbose("get_next_index: stream hung up\n");
757 viewer_stream
->id
= -1ULL;
758 viewer_stream
->fd
= -1;
761 case LTTNG_VIEWER_INDEX_ERR
:
762 fprintf(stderr
, "[error] get_next_index: error\n");
766 fprintf(stderr
, "[error] get_next_index: unkwown value\n");
777 void ctf_live_packet_seek(struct bt_stream_pos
*stream_pos
, size_t index
,
780 struct ctf_stream_pos
*pos
;
781 struct ctf_file_stream
*file_stream
;
782 struct packet_index packet_index
;
783 struct lttng_live_viewer_stream
*viewer_stream
;
784 struct lttng_live_session
*session
;
788 pos
= ctf_pos(stream_pos
);
789 file_stream
= container_of(pos
, struct ctf_file_stream
, pos
);
790 viewer_stream
= (struct lttng_live_viewer_stream
*) pos
->priv
;
791 session
= viewer_stream
->session
;
793 printf_verbose("get_next_index for stream %" PRIu64
"\n", viewer_stream
->id
);
794 ret
= get_next_index(session
->ctx
, viewer_stream
, &packet_index
);
797 fprintf(stderr
, "[error] get_next_index failed\n");
801 pos
->packet_size
= packet_index
.packet_size
;
802 pos
->content_size
= packet_index
.content_size
;
803 pos
->mmap_base_offset
= 0;
804 if (packet_index
.offset
== EOF
) {
810 if (packet_index
.content_size
== 0) {
811 file_stream
->parent
.cycles_timestamp
= packet_index
.timestamp_end
;
812 file_stream
->parent
.real_timestamp
= ctf_get_real_timestamp(
813 &file_stream
->parent
, packet_index
.timestamp_end
);
815 file_stream
->parent
.cycles_timestamp
= packet_index
.timestamp_begin
;
816 file_stream
->parent
.real_timestamp
= ctf_get_real_timestamp(
817 &file_stream
->parent
, packet_index
.timestamp_begin
);
820 if (pos
->packet_size
== 0 || pos
->offset
== EOF
) {
824 printf_verbose("get_data_packet for stream %" PRIu64
"\n",
826 ret
= get_data_packet(session
->ctx
, pos
, viewer_stream
,
827 be64toh(packet_index
.offset
),
828 packet_index
.packet_size
/ CHAR_BIT
);
831 } else if (ret
< 0) {
833 fprintf(stderr
, "[error] get_data_packet failed\n");
837 printf_verbose("Index received : packet_size : %" PRIu64
838 ", offset %" PRIu64
", content_size %" PRIu64
839 ", timestamp_end : %" PRIu64
"\n",
840 packet_index
.packet_size
, packet_index
.offset
,
841 packet_index
.content_size
, packet_index
.timestamp_end
);
843 /* update trace_packet_header and stream_packet_context */
844 if (pos
->prot
!= PROT_WRITE
&& file_stream
->parent
.trace_packet_header
) {
845 /* Read packet header */
846 ret
= generic_rw(&pos
->parent
, &file_stream
->parent
.trace_packet_header
->p
);
849 fprintf(stderr
, "[error] trace packet header read failed\n");
853 if (pos
->prot
!= PROT_WRITE
&& file_stream
->parent
.stream_packet_context
) {
854 /* Read packet context */
855 ret
= generic_rw(&pos
->parent
, &file_stream
->parent
.stream_packet_context
->p
);
858 fprintf(stderr
, "[error] stream packet context read failed\n");
862 pos
->data_offset
= pos
->offset
;
868 static int del_traces(gpointer key
, gpointer value
, gpointer user_data
)
870 struct bt_context
*bt_ctx
= user_data
;
871 struct lttng_live_ctf_trace
*trace
= value
;
874 ret
= bt_context_remove_trace(bt_ctx
, trace
->trace_id
);
876 fprintf(stderr
, "[error] removing trace from context\n");
878 /* remove the key/value pair from the HT. */
882 static void add_traces(gpointer key
, gpointer value
, gpointer user_data
)
884 int i
, ret
, total_metadata
= 0;
885 uint64_t metadata_len
;
886 struct bt_context
*bt_ctx
= user_data
;
887 struct lttng_live_ctf_trace
*trace
= value
;
888 struct lttng_live_viewer_stream
*stream
;
889 struct bt_mmap_stream
*new_mmap_stream
;
890 struct bt_mmap_stream_list mmap_list
;
891 struct lttng_live_ctx
*ctx
= NULL
;
893 BT_INIT_LIST_HEAD(&mmap_list
.head
);
895 for (i
= 0; i
< trace
->streams
->len
; i
++) {
896 stream
= g_ptr_array_index(trace
->streams
, i
);
897 ctx
= stream
->session
->ctx
;
899 if (!stream
->metadata_flag
) {
900 new_mmap_stream
= zmalloc(sizeof(struct bt_mmap_stream
));
901 new_mmap_stream
->priv
= (void *) stream
;
902 new_mmap_stream
->fd
= -1;
903 bt_list_add(&new_mmap_stream
->list
, &mmap_list
.head
);
905 /* Get all possible metadata before starting */
907 ret
= get_new_metadata(ctx
, stream
,
910 total_metadata
+= metadata_len
;
912 } while (ret
== 0 || total_metadata
== 0);
913 trace
->metadata_fp
= fopen(stream
->path
, "r");
917 if (!trace
->metadata_fp
) {
918 fprintf(stderr
, "[error] No metadata stream opened\n");
922 ret
= bt_context_add_trace(bt_ctx
, NULL
, "ctf",
923 ctf_live_packet_seek
, &mmap_list
, trace
->metadata_fp
);
925 fprintf(stderr
, "[error] Error adding trace\n");
928 trace
->trace_id
= ret
;
933 bt_context_put(bt_ctx
);
938 void lttng_live_read(struct lttng_live_ctx
*ctx
, uint64_t session_id
)
940 int ret
, active_session
= 0;
941 struct bt_context
*bt_ctx
;
943 bt_ctx
= bt_context_create();
945 fprintf(stderr
, "[error] bt_context_create allocation\n");
950 * As long as the session is active, we try to reattach to it,
951 * even if all the streams get closed.
955 ret
= lttng_live_attach_session(ctx
, session_id
);
956 printf_verbose("Attaching session returns %d\n", ret
);
958 if (ret
== -LTTNG_VIEWER_ATTACH_UNK
) {
961 fprintf(stderr
, "[error] Unknown "
968 } while (ctx
->session
->stream_count
== 0);
970 g_hash_table_foreach(ctx
->session
->ctf_traces
, add_traces
, bt_ctx
);
972 ret
= check_requirements(bt_ctx
);
974 fprintf(stderr
, "[error] some mandatory contexts "
975 "were missing, exiting.\n");
980 pthread_create(&display_thread
, NULL
, ncurses_display
,
982 pthread_create(&timer_thread
, NULL
, refresh_thread
,
988 g_hash_table_foreach_remove(ctx
->session
->ctf_traces
, del_traces
, bt_ctx
);
989 // } while (active_session);
992 bt_context_put(bt_ctx
);