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"
57 #include "liblttng-live.h"
58 #include "lttng-viewer-abi.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 static void ctf_live_packet_seek(struct bt_stream_pos
*stream_pos
,
71 size_t index
, int whence
);
72 static void add_traces(gpointer key
, gpointer value
, gpointer user_data
);
73 static int del_traces(gpointer key
, gpointer value
, gpointer user_data
);
75 int lttng_live_connect_viewer(struct lttng_live_ctx
*ctx
)
78 struct sockaddr_in server_addr
;
81 host
= gethostbyname(ctx
->relay_hostname
);
87 if ((ctx
->control_sock
= socket(AF_INET
, SOCK_STREAM
, 0)) == -1) {
93 server_addr
.sin_family
= AF_INET
;
94 server_addr
.sin_port
= htons(ctx
->port
);
95 server_addr
.sin_addr
= *((struct in_addr
*) host
->h_addr
);
96 bzero(&(server_addr
.sin_zero
), 8);
98 if (connect(ctx
->control_sock
, (struct sockaddr
*) &server_addr
,
99 sizeof(struct sockaddr
)) == -1) {
111 int lttng_live_establish_connection(struct lttng_live_ctx
*ctx
)
113 struct lttng_viewer_cmd cmd
;
114 struct lttng_viewer_connect connect
;
118 cmd
.cmd
= htobe32(LTTNG_VIEWER_CONNECT
);
119 cmd
.data_size
= sizeof(connect
);
122 connect
.viewer_session_id
= -1ULL; /* will be set on recv */
123 connect
.major
= htobe32(LTTNG_LIVE_MAJOR
);
124 connect
.minor
= htobe32(LTTNG_LIVE_MINOR
);
125 connect
.type
= htobe32(LTTNG_VIEWER_CLIENT_COMMAND
);
128 ret_len
= send(ctx
->control_sock
, &cmd
, sizeof(cmd
), 0);
129 } while (ret_len
< 0 && errno
== EINTR
);
131 fprintf(stderr
, "[error] Error sending cmd\n");
135 assert(ret_len
== sizeof(cmd
));
138 ret_len
= send(ctx
->control_sock
, &connect
, sizeof(connect
), 0);
139 } while (ret_len
< 0 && errno
== EINTR
);
141 fprintf(stderr
, "[error] Error sending version\n");
145 assert(ret_len
== sizeof(connect
));
148 ret_len
= recv(ctx
->control_sock
, &connect
, sizeof(connect
), 0);
149 } while (ret_len
< 0 && errno
== EINTR
);
151 fprintf(stderr
, "[error] Error receiving version\n");
155 assert(ret_len
== sizeof(connect
));
157 printf_verbose("Received viewer session ID : %" PRIu64
"\n",
158 be64toh(connect
.viewer_session_id
));
159 printf_verbose("Relayd version : %u.%u\n", be32toh(connect
.major
),
160 be32toh(connect
.minor
));
169 void free_session_list(GPtrArray
*session_list
)
172 struct lttng_live_relay_session
*relay_session
;
174 for (i
= 0; i
< session_list
->len
; i
++) {
175 relay_session
= g_ptr_array_index(session_list
, i
);
176 free(relay_session
->name
);
177 free(relay_session
->hostname
);
179 g_ptr_array_free(session_list
, TRUE
);
183 void print_session_list(GPtrArray
*session_list
, const char *path
)
186 struct lttng_live_relay_session
*relay_session
;
188 for (i
= 0; i
< session_list
->len
; i
++) {
189 relay_session
= g_ptr_array_index(session_list
, i
);
190 fprintf(stdout
, "%s/host/%s/%s (timer = %u, "
191 "%u stream(s), %u client(s) connected)\n",
192 path
, relay_session
->hostname
,
193 relay_session
->name
, relay_session
->timer
,
194 relay_session
->streams
, relay_session
->clients
);
199 void update_session_list(GPtrArray
*session_list
, char *hostname
,
200 char *session_name
, uint32_t streams
, uint32_t clients
,
204 struct lttng_live_relay_session
*relay_session
;
206 for (i
= 0; i
< session_list
->len
; i
++) {
207 relay_session
= g_ptr_array_index(session_list
, i
);
208 if ((strncmp(relay_session
->hostname
, hostname
, NAME_MAX
) == 0) &&
209 strncmp(relay_session
->name
,
210 session_name
, NAME_MAX
) == 0) {
211 relay_session
->streams
+= streams
;
212 if (relay_session
->clients
< clients
)
213 relay_session
->clients
= clients
;
221 relay_session
= g_new0(struct lttng_live_relay_session
, 1);
222 relay_session
->hostname
= strndup(hostname
, NAME_MAX
);
223 relay_session
->name
= strndup(session_name
, NAME_MAX
);
224 relay_session
->clients
= clients
;
225 relay_session
->streams
= streams
;
226 relay_session
->timer
= timer
;
227 g_ptr_array_add(session_list
, relay_session
);
230 int lttng_live_list_sessions(struct lttng_live_ctx
*ctx
, const char *path
)
232 struct lttng_viewer_cmd cmd
;
233 struct lttng_viewer_list_sessions list
;
234 struct lttng_viewer_session lsession
;
235 int i
, ret
, sessions_count
, print_list
= 0;
238 GPtrArray
*session_list
= NULL
;
240 if (strlen(ctx
->session_name
) == 0) {
242 session_list
= g_ptr_array_new();
245 cmd
.cmd
= htobe32(LTTNG_VIEWER_LIST_SESSIONS
);
250 ret_len
= send(ctx
->control_sock
, &cmd
, sizeof(cmd
), 0);
251 } while (ret_len
< 0 && errno
== EINTR
);
253 fprintf(stderr
, "[error] Error sending cmd\n");
257 assert(ret_len
== sizeof(cmd
));
260 ret_len
= recv(ctx
->control_sock
, &list
, sizeof(list
), 0);
261 } while (ret_len
< 0 && errno
== EINTR
);
263 fprintf(stderr
, "[error] Error receiving session list\n");
267 assert(ret_len
== sizeof(list
));
269 sessions_count
= be32toh(list
.sessions_count
);
270 for (i
= 0; i
< sessions_count
; i
++) {
272 ret_len
= recv(ctx
->control_sock
, &lsession
, sizeof(lsession
), 0);
273 } while (ret_len
< 0 && errno
== EINTR
);
275 fprintf(stderr
, "[error] Error receiving session\n");
279 assert(ret_len
== sizeof(lsession
));
280 lsession
.hostname
[LTTNG_VIEWER_HOST_NAME_MAX
- 1] = '\0';
281 lsession
.session_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
282 session_id
= be64toh(lsession
.id
);
285 update_session_list(session_list
,
287 lsession
.session_name
,
288 be32toh(lsession
.streams
),
289 be32toh(lsession
.clients
),
290 be32toh(lsession
.live_timer
));
292 if ((strncmp(lsession
.session_name
, ctx
->session_name
,
293 NAME_MAX
) == 0) && (strncmp(lsession
.hostname
,
294 ctx
->traced_hostname
, NAME_MAX
) == 0)) {
295 printf_verbose("Reading from session %" PRIu64
"\n",
297 g_array_append_val(ctx
->session_ids
,
304 print_session_list(session_list
, path
);
305 free_session_list(session_list
);
314 int lttng_live_ctf_trace_assign(struct lttng_live_viewer_stream
*stream
,
315 uint64_t ctf_trace_id
)
317 struct lttng_live_ctf_trace
*trace
;
320 trace
= g_hash_table_lookup(stream
->session
->ctf_traces
,
321 (gpointer
) ctf_trace_id
);
323 trace
= g_new0(struct lttng_live_ctf_trace
, 1);
324 trace
->ctf_trace_id
= ctf_trace_id
;
325 trace
->streams
= g_ptr_array_new();
326 g_hash_table_insert(stream
->session
->ctf_traces
,
327 (gpointer
) ctf_trace_id
,
330 if (stream
->metadata_flag
)
331 trace
->metadata_stream
= stream
;
333 stream
->ctf_trace
= trace
;
334 g_ptr_array_add(trace
->streams
, stream
);
339 int lttng_live_attach_session(struct lttng_live_ctx
*ctx
, uint64_t id
)
341 struct lttng_viewer_cmd cmd
;
342 struct lttng_viewer_attach_session_request rq
;
343 struct lttng_viewer_attach_session_response rp
;
344 struct lttng_viewer_stream stream
;
348 cmd
.cmd
= htobe32(LTTNG_VIEWER_ATTACH_SESSION
);
349 cmd
.data_size
= sizeof(rq
);
352 memset(&rq
, 0, sizeof(rq
));
353 rq
.session_id
= htobe64(id
);
354 // TODO: add cmd line parameter to select seek beginning
355 // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING);
356 rq
.seek
= htobe32(LTTNG_VIEWER_SEEK_LAST
);
359 ret_len
= send(ctx
->control_sock
, &cmd
, sizeof(cmd
), 0);
360 } while (ret_len
< 0 && errno
== EINTR
);
362 fprintf(stderr
, "[error] Error sending cmd\n");
366 assert(ret_len
== sizeof(cmd
));
369 ret_len
= send(ctx
->control_sock
, &rq
, sizeof(rq
), 0);
370 } while (ret_len
< 0 && errno
== EINTR
);
372 fprintf(stderr
, "[error] Error sending attach request\n");
376 assert(ret_len
== sizeof(rq
));
379 ret_len
= recv(ctx
->control_sock
, &rp
, sizeof(rp
), 0);
380 } while (ret_len
< 0 && errno
== EINTR
);
382 fprintf(stderr
, "[error] Error receiving attach response\n");
386 assert(ret_len
== sizeof(rp
));
388 switch(be32toh(rp
.status
)) {
389 case LTTNG_VIEWER_ATTACH_OK
:
391 case LTTNG_VIEWER_ATTACH_UNK
:
392 ret
= -LTTNG_VIEWER_ATTACH_UNK
;
394 case LTTNG_VIEWER_ATTACH_ALREADY
:
395 fprintf(stderr
, "[error] Already a viewer attached\n");
398 case LTTNG_VIEWER_ATTACH_NOT_LIVE
:
399 fprintf(stderr
, "[error] Not a live session\n");
402 case LTTNG_VIEWER_ATTACH_SEEK_ERR
:
403 fprintf(stderr
, "[error] Wrong seek parameter\n");
407 fprintf(stderr
, "[error] Unknown attach return code %u\n",
412 if (be32toh(rp
.status
) != LTTNG_VIEWER_ATTACH_OK
) {
417 ctx
->session
->stream_count
+= be32toh(rp
.streams_count
);
419 * When the session is created but not started, we do an active wait
420 * until it starts. It allows the viewer to start processing the trace
421 * as soon as the session starts.
423 if (ctx
->session
->stream_count
== 0) {
427 printf_verbose("Waiting for %" PRIu64
" streams:\n",
428 ctx
->session
->stream_count
);
429 ctx
->session
->streams
= g_new0(struct lttng_live_viewer_stream
,
430 ctx
->session
->stream_count
);
431 for (i
= 0; i
< be32toh(rp
.streams_count
); i
++) {
433 ret_len
= recv(ctx
->control_sock
, &stream
, sizeof(stream
), 0);
434 } while (ret_len
< 0 && errno
== EINTR
);
436 fprintf(stderr
, "[error] Error receiving stream\n");
440 assert(ret_len
== sizeof(stream
));
441 stream
.path_name
[LTTNG_VIEWER_PATH_MAX
- 1] = '\0';
442 stream
.channel_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
444 printf_verbose(" stream %" PRIu64
" : %s/%s\n",
445 be64toh(stream
.id
), stream
.path_name
,
446 stream
.channel_name
);
447 ctx
->session
->streams
[i
].id
= be64toh(stream
.id
);
448 ctx
->session
->streams
[i
].session
= ctx
->session
;
450 ctx
->session
->streams
[i
].first_read
= 1;
451 ctx
->session
->streams
[i
].mmap_size
= 0;
453 if (be32toh(stream
.metadata_flag
)) {
456 path
= strdup(LTTNG_METADATA_PATH_TEMPLATE
);
462 if (!mkdtemp(path
)) {
468 ctx
->session
->streams
[i
].metadata_flag
= 1;
469 snprintf(ctx
->session
->streams
[i
].path
,
470 sizeof(ctx
->session
->streams
[i
].path
),
472 stream
.channel_name
);
473 ret
= open(ctx
->session
->streams
[i
].path
,
474 O_WRONLY
| O_CREAT
| O_TRUNC
,
475 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
);
481 ctx
->session
->streams
[i
].fd
= ret
;
484 ret
= lttng_live_ctf_trace_assign(&ctx
->session
->streams
[i
],
485 be64toh(stream
.ctf_trace_id
));
499 int ask_new_streams(struct lttng_live_ctx
*ctx
)
505 for (i
= 0; i
< ctx
->session_ids
->len
; i
++) {
506 id
= g_array_index(ctx
->session_ids
, uint64_t, i
);
507 ret
= lttng_live_get_new_streams(ctx
, id
);
508 printf_verbose("Asking for new streams returns %d\n",
511 if (ret
== -LTTNG_VIEWER_NEW_STREAMS_HUP
) {
512 printf_verbose("Session %" PRIu64
" closed\n",
515 * The streams have already been closed during
516 * the reading, so we only need to get rid of
517 * the trace in our internal table of sessions.
519 g_array_remove_index(ctx
->session_ids
, i
);
521 * We can't continue iterating on the g_array
522 * after a remove, we have to start again.
537 int get_data_packet(struct lttng_live_ctx
*ctx
,
538 struct ctf_stream_pos
*pos
,
539 struct lttng_live_viewer_stream
*stream
, uint64_t offset
,
542 struct lttng_viewer_cmd cmd
;
543 struct lttng_viewer_get_packet rq
;
544 struct lttng_viewer_trace_packet rp
;
548 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_PACKET
);
549 cmd
.data_size
= sizeof(rq
);
552 memset(&rq
, 0, sizeof(rq
));
553 rq
.stream_id
= htobe64(stream
->id
);
554 /* Already in big endian. */
556 rq
.len
= htobe32(len
);
559 ret_len
= send(ctx
->control_sock
, &cmd
, sizeof(cmd
), 0);
560 } while (ret_len
< 0 && errno
== EINTR
);
562 fprintf(stderr
, "[error] Error sending cmd\n");
566 assert(ret_len
== sizeof(cmd
));
569 ret_len
= send(ctx
->control_sock
, &rq
, sizeof(rq
), 0);
570 } while (ret_len
< 0 && errno
== EINTR
);
572 fprintf(stderr
, "[error] Error sending get_data_packet request\n");
576 assert(ret_len
== sizeof(rq
));
579 ret_len
= recv(ctx
->control_sock
, &rp
, sizeof(rp
), 0);
580 } while (ret_len
< 0 && errno
== EINTR
);
582 fprintf(stderr
, "[error] Error receiving data response\n");
586 if (ret_len
!= sizeof(rp
)) {
587 fprintf(stderr
, "[error] get_data_packet: expected %" PRId64
588 ", received %" PRId64
"\n", ret_len
,
594 rp
.flags
= be32toh(rp
.flags
);
596 switch (be32toh(rp
.status
)) {
597 case LTTNG_VIEWER_GET_PACKET_OK
:
598 len
= be32toh(rp
.len
);
599 printf_verbose("get_data_packet: Ok, packet size : %" PRIu64
602 case LTTNG_VIEWER_GET_PACKET_RETRY
:
603 printf_verbose("get_data_packet: retry\n");
606 case LTTNG_VIEWER_GET_PACKET_ERR
:
607 if (rp
.flags
& LTTNG_VIEWER_FLAG_NEW_METADATA
) {
608 printf_verbose("get_data_packet: new metadata needed\n");
612 if (rp
.flags
& LTTNG_VIEWER_FLAG_NEW_STREAM
) {
613 ret
= ask_new_streams(ctx
);
616 g_hash_table_foreach(ctx
->session
->ctf_traces
, add_traces
,
619 fprintf(stderr
, "[error] get_data_packet: error\n");
622 case LTTNG_VIEWER_GET_PACKET_EOF
:
626 printf_verbose("get_data_packet: unknown\n");
637 if (len
> stream
->mmap_size
) {
640 new_size
= max_t(uint64_t, len
, stream
->mmap_size
<< 1);
643 ret
= munmap_align(pos
->base_mma
);
645 fprintf(stderr
, "[error] Unable to unmap old base: %s.\n",
650 pos
->base_mma
= NULL
;
652 pos
->base_mma
= mmap_align(new_size
,
653 PROT_READ
| PROT_WRITE
,
654 MAP_PRIVATE
| MAP_ANONYMOUS
, -1, 0);
655 if (pos
->base_mma
== MAP_FAILED
) {
656 fprintf(stderr
, "[error] mmap error %s.\n",
658 pos
->base_mma
= NULL
;
663 stream
->mmap_size
= new_size
;
664 printf_verbose("Expanding stream mmap size to %" PRIu64
" bytes\n",
669 ret_len
= recv(ctx
->control_sock
,
670 mmap_align_addr(pos
->base_mma
), len
,
672 } while (ret_len
< 0 && errno
== EINTR
);
674 fprintf(stderr
, "[error] Error receiving trace packet\n");
678 assert(ret_len
== len
);
686 * Return number of metadata bytes written or a negative value on error.
689 int get_new_metadata(struct lttng_live_ctx
*ctx
,
690 struct lttng_live_viewer_stream
*viewer_stream
,
691 uint64_t *metadata_len
)
695 struct lttng_viewer_cmd cmd
;
696 struct lttng_viewer_get_metadata rq
;
697 struct lttng_viewer_metadata_packet rp
;
698 struct lttng_live_viewer_stream
*metadata_stream
;
702 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_METADATA
);
703 cmd
.data_size
= sizeof(rq
);
706 metadata_stream
= viewer_stream
->ctf_trace
->metadata_stream
;
707 rq
.stream_id
= htobe64(metadata_stream
->id
);
710 ret_len
= send(ctx
->control_sock
, &cmd
, sizeof(cmd
), 0);
711 } while (ret_len
< 0 && errno
== EINTR
);
713 fprintf(stderr
, "[error] Error sending cmd\n");
717 assert(ret_len
== sizeof(cmd
));
720 ret_len
= send(ctx
->control_sock
, &rq
, sizeof(rq
), 0);
721 } while (ret_len
< 0 && errno
== EINTR
);
723 fprintf(stderr
, "[error] Error sending get_metadata request\n");
727 assert(ret_len
== sizeof(rq
));
730 ret_len
= recv(ctx
->control_sock
, &rp
, sizeof(rp
), 0);
731 } while (ret_len
< 0 && errno
== EINTR
);
733 fprintf(stderr
, "[error] Error receiving metadata response\n");
737 assert(ret_len
== sizeof(rp
));
739 switch (be32toh(rp
.status
)) {
740 case LTTNG_VIEWER_METADATA_OK
:
741 printf_verbose("get_metadata : OK\n");
743 case LTTNG_VIEWER_NO_NEW_METADATA
:
744 printf_verbose("get_metadata : NO NEW\n");
747 case LTTNG_VIEWER_METADATA_ERR
:
748 printf_verbose("get_metadata : ERR\n");
752 printf_verbose("get_metadata : UNKNOWN\n");
757 len
= be64toh(rp
.len
);
758 printf_verbose("Writing %" PRIu64
" bytes to metadata\n", len
);
766 perror("relay data zmalloc");
771 ret_len
= recv(ctx
->control_sock
, data
, len
, MSG_WAITALL
);
772 } while (ret_len
< 0 && errno
== EINTR
);
774 fprintf(stderr
, "[error] Error receiving trace packet\n");
779 assert(ret_len
== len
);
782 ret_len
= write(metadata_stream
->fd
, data
, len
);
783 } while (ret_len
< 0 && errno
== EINTR
);
789 assert(ret_len
== len
);
801 * Get one index for a stream.
803 * Returns 0 on success or a negative value on error.
806 int get_next_index(struct lttng_live_ctx
*ctx
,
807 struct lttng_live_viewer_stream
*viewer_stream
,
808 struct packet_index
*index
)
810 struct lttng_viewer_cmd cmd
;
811 struct lttng_viewer_get_next_index rq
;
812 struct lttng_viewer_index rp
;
814 uint64_t metadata_len
;
817 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_NEXT_INDEX
);
818 cmd
.data_size
= sizeof(rq
);
821 memset(&rq
, 0, sizeof(rq
));
822 rq
.stream_id
= htobe64(viewer_stream
->id
);
826 ret_len
= send(ctx
->control_sock
, &cmd
, sizeof(cmd
), 0);
827 } while (ret_len
< 0 && errno
== EINTR
);
829 fprintf(stderr
, "[error] Error sending cmd\n");
833 assert(ret_len
== sizeof(cmd
));
836 ret_len
= send(ctx
->control_sock
, &rq
, sizeof(rq
), 0);
837 } while (ret_len
< 0 && errno
== EINTR
);
839 fprintf(stderr
, "[error] Error sending get_next_index request\n");
843 assert(ret_len
== sizeof(rq
));
846 ret_len
= recv(ctx
->control_sock
, &rp
, sizeof(rp
), 0);
847 } while (ret_len
< 0 && errno
== EINTR
);
849 fprintf(stderr
, "[error] Error receiving index response\n");
853 assert(ret_len
== sizeof(rp
));
855 rp
.flags
= be32toh(rp
.flags
);
857 switch (be32toh(rp
.status
)) {
858 case LTTNG_VIEWER_INDEX_INACTIVE
:
859 printf_verbose("get_next_index: inactive\n");
860 memset(index
, 0, sizeof(struct packet_index
));
861 index
->timestamp_end
= be64toh(rp
.timestamp_end
);
863 case LTTNG_VIEWER_INDEX_OK
:
864 printf_verbose("get_next_index: Ok, need metadata update : %u\n",
865 rp
.flags
& LTTNG_VIEWER_FLAG_NEW_METADATA
);
866 index
->offset
= be64toh(rp
.offset
);
867 index
->packet_size
= be64toh(rp
.packet_size
);
868 index
->content_size
= be64toh(rp
.content_size
);
869 index
->timestamp_begin
= be64toh(rp
.timestamp_begin
);
870 index
->timestamp_end
= be64toh(rp
.timestamp_end
);
871 index
->events_discarded
= be64toh(rp
.events_discarded
);
873 if (rp
.flags
& LTTNG_VIEWER_FLAG_NEW_METADATA
) {
874 printf_verbose("get_next_index: new metadata needed\n");
875 ret
= get_new_metadata(ctx
, viewer_stream
,
881 if (rp
.flags
& LTTNG_VIEWER_FLAG_NEW_STREAM
) {
882 ret
= ask_new_streams(ctx
);
885 g_hash_table_foreach(ctx
->session
->ctf_traces
, add_traces
,
889 case LTTNG_VIEWER_INDEX_RETRY
:
890 printf_verbose("get_next_index: retry\n");
893 case LTTNG_VIEWER_INDEX_HUP
:
894 printf_verbose("get_next_index: stream hung up\n");
895 viewer_stream
->id
= -1ULL;
896 viewer_stream
->fd
= -1;
898 ctx
->session
->stream_count
--;
900 case LTTNG_VIEWER_INDEX_ERR
:
901 fprintf(stderr
, "[error] get_next_index: error\n");
905 fprintf(stderr
, "[error] get_next_index: unkwown value\n");
917 void ctf_live_packet_seek(struct bt_stream_pos
*stream_pos
, size_t index
,
920 struct ctf_stream_pos
*pos
;
921 struct ctf_file_stream
*file_stream
;
922 struct packet_index packet_index
;
923 struct lttng_live_viewer_stream
*viewer_stream
;
924 struct lttng_live_session
*session
;
928 pos
= ctf_pos(stream_pos
);
929 file_stream
= container_of(pos
, struct ctf_file_stream
, pos
);
930 viewer_stream
= (struct lttng_live_viewer_stream
*) pos
->priv
;
931 session
= viewer_stream
->session
;
933 printf_verbose("get_next_index for stream %" PRIu64
"\n", viewer_stream
->id
);
934 ret
= get_next_index(session
->ctx
, viewer_stream
, &packet_index
);
937 fprintf(stderr
, "[error] get_next_index failed\n");
941 pos
->packet_size
= packet_index
.packet_size
;
942 pos
->content_size
= packet_index
.content_size
;
943 pos
->mmap_base_offset
= 0;
944 if (packet_index
.offset
== EOF
) {
950 if (packet_index
.content_size
== 0) {
951 file_stream
->parent
.cycles_timestamp
= packet_index
.timestamp_end
;
952 file_stream
->parent
.real_timestamp
= ctf_get_real_timestamp(
953 &file_stream
->parent
, packet_index
.timestamp_end
);
955 file_stream
->parent
.cycles_timestamp
= packet_index
.timestamp_begin
;
956 file_stream
->parent
.real_timestamp
= ctf_get_real_timestamp(
957 &file_stream
->parent
, packet_index
.timestamp_begin
);
960 if (pos
->packet_size
== 0 || pos
->offset
== EOF
) {
964 printf_verbose("get_data_packet for stream %" PRIu64
"\n",
966 ret
= get_data_packet(session
->ctx
, pos
, viewer_stream
,
967 be64toh(packet_index
.offset
),
968 packet_index
.packet_size
/ CHAR_BIT
);
971 } else if (ret
< 0) {
973 fprintf(stderr
, "[error] get_data_packet failed\n");
977 printf_verbose("Index received : packet_size : %" PRIu64
978 ", offset %" PRIu64
", content_size %" PRIu64
979 ", timestamp_end : %" PRIu64
"\n",
980 packet_index
.packet_size
, packet_index
.offset
,
981 packet_index
.content_size
, packet_index
.timestamp_end
);
983 /* update trace_packet_header and stream_packet_context */
984 if (pos
->prot
!= PROT_WRITE
&& file_stream
->parent
.trace_packet_header
) {
985 /* Read packet header */
986 ret
= generic_rw(&pos
->parent
, &file_stream
->parent
.trace_packet_header
->p
);
989 fprintf(stderr
, "[error] trace packet header read failed\n");
993 if (pos
->prot
!= PROT_WRITE
&& file_stream
->parent
.stream_packet_context
) {
994 /* Read packet context */
995 ret
= generic_rw(&pos
->parent
, &file_stream
->parent
.stream_packet_context
->p
);
998 fprintf(stderr
, "[error] stream packet context read failed\n");
1002 pos
->data_offset
= pos
->offset
;
1008 int lttng_live_create_viewer_session(struct lttng_live_ctx
*ctx
)
1010 struct lttng_viewer_cmd cmd
;
1011 struct lttng_viewer_create_session_response resp
;
1015 cmd
.cmd
= htobe32(LTTNG_VIEWER_CREATE_SESSION
);
1017 cmd
.cmd_version
= 0;
1020 ret_len
= send(ctx
->control_sock
, &cmd
, sizeof(cmd
), 0);
1021 } while (ret_len
< 0 && errno
== EINTR
);
1023 fprintf(stderr
, "[error] Error sending cmd\n");
1027 assert(ret_len
== sizeof(cmd
));
1030 ret_len
= recv(ctx
->control_sock
, &resp
, sizeof(resp
), 0);
1031 } while (ret_len
< 0 && errno
== EINTR
);
1033 fprintf(stderr
, "[error] Error receiving create session reply\n");
1037 assert(ret_len
== sizeof(resp
));
1039 if (be32toh(resp
.status
) != LTTNG_VIEWER_CREATE_SESSION_OK
) {
1040 fprintf(stderr
, "[error] Error creating viewer session\n");
1051 int del_traces(gpointer key
, gpointer value
, gpointer user_data
)
1053 struct bt_context
*bt_ctx
= user_data
;
1054 struct lttng_live_ctf_trace
*trace
= value
;
1057 ret
= bt_context_remove_trace(bt_ctx
, trace
->trace_id
);
1059 fprintf(stderr
, "[error] removing trace from context\n");
1061 /* remove the key/value pair from the HT. */
1066 void add_traces(gpointer key
, gpointer value
, gpointer user_data
)
1068 int i
, ret
, total_metadata
= 0;
1069 uint64_t metadata_len
;
1070 struct bt_context
*bt_ctx
= user_data
;
1071 struct lttng_live_ctf_trace
*trace
= value
;
1072 struct lttng_live_viewer_stream
*stream
;
1073 struct bt_mmap_stream
*new_mmap_stream
;
1074 struct bt_mmap_stream_list mmap_list
;
1075 struct lttng_live_ctx
*ctx
= NULL
;
1078 * We don't know how many streams we will receive for a trace, so
1079 * once we are done receiving the traces, we add all the traces
1080 * received to the bt_context.
1081 * We can receive streams during the attach command or the
1082 * get_new_streams, so we have to make sure not to add multiple
1083 * times the same traces.
1084 * If a trace is already in the context, we just skip this function.
1089 BT_INIT_LIST_HEAD(&mmap_list
.head
);
1091 for (i
= 0; i
< trace
->streams
->len
; i
++) {
1092 stream
= g_ptr_array_index(trace
->streams
, i
);
1093 ctx
= stream
->session
->ctx
;
1095 if (!stream
->metadata_flag
) {
1096 new_mmap_stream
= zmalloc(sizeof(struct bt_mmap_stream
));
1097 new_mmap_stream
->priv
= (void *) stream
;
1098 new_mmap_stream
->fd
= -1;
1099 bt_list_add(&new_mmap_stream
->list
, &mmap_list
.head
);
1101 /* Get all possible metadata before starting */
1103 ret
= get_new_metadata(ctx
, stream
,
1106 total_metadata
+= metadata_len
;
1108 } while (ret
== 0 || total_metadata
== 0);
1109 trace
->metadata_fp
= fopen(stream
->path
, "r");
1113 if (!trace
->metadata_fp
) {
1114 fprintf(stderr
, "[error] No metadata stream opened\n");
1118 ret
= bt_context_add_trace(bt_ctx
, NULL
, "ctf",
1119 ctf_live_packet_seek
, &mmap_list
, trace
->metadata_fp
);
1121 fprintf(stderr
, "[error] Error adding trace\n");
1125 if (bt_ctx
->current_iterator
) {
1126 struct bt_trace_descriptor
*td
;
1127 struct bt_trace_handle
*handle
;
1129 handle
= (struct bt_trace_handle
*) g_hash_table_lookup(
1130 bt_ctx
->trace_handles
,
1131 (gpointer
) (unsigned long) ret
);
1133 bt_iter_add_trace(bt_ctx
->current_iterator
, td
);
1136 trace
->trace_id
= ret
;
1142 bt_context_put(bt_ctx
);
1147 int lttng_live_get_new_streams(struct lttng_live_ctx
*ctx
, uint64_t id
)
1149 struct lttng_viewer_cmd cmd
;
1150 struct lttng_viewer_new_streams_request rq
;
1151 struct lttng_viewer_new_streams_response rp
;
1152 struct lttng_viewer_stream stream
;
1155 uint32_t stream_count
;
1157 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_NEW_STREAMS
);
1158 cmd
.data_size
= sizeof(rq
);
1159 cmd
.cmd_version
= 0;
1161 memset(&rq
, 0, sizeof(rq
));
1162 rq
.session_id
= htobe64(id
);
1165 ret_len
= send(ctx
->control_sock
, &cmd
, sizeof(cmd
), 0);
1166 } while (ret_len
< 0 && errno
== EINTR
);
1168 fprintf(stderr
, "[error] Error sending cmd\n");
1172 assert(ret_len
== sizeof(cmd
));
1175 ret_len
= send(ctx
->control_sock
, &rq
, sizeof(rq
), 0);
1176 } while (ret_len
< 0 && errno
== EINTR
);
1178 fprintf(stderr
, "[error] Error sending get_new_streams request\n");
1182 assert(ret_len
== sizeof(rq
));
1185 ret_len
= recv(ctx
->control_sock
, &rp
, sizeof(rp
), 0);
1186 } while (ret_len
< 0 && errno
== EINTR
);
1188 fprintf(stderr
, "[error] Error receiving get_new_streams response\n");
1192 assert(ret_len
== sizeof(rp
));
1194 switch(be32toh(rp
.status
)) {
1195 case LTTNG_VIEWER_NEW_STREAMS_OK
:
1197 case LTTNG_VIEWER_NEW_STREAMS_NO_NEW
:
1200 case LTTNG_VIEWER_NEW_STREAMS_HUP
:
1201 ret
= -LTTNG_VIEWER_NEW_STREAMS_HUP
;
1203 case LTTNG_VIEWER_NEW_STREAMS_ERR
:
1204 fprintf(stderr
, "[error] get_new_streams error\n");
1208 fprintf(stderr
, "[error] Unknown return code %u\n",
1209 be32toh(rp
.status
));
1214 stream_count
= be32toh(rp
.streams_count
);
1215 ctx
->session
->stream_count
+= stream_count
;
1217 * When the session is created but not started, we do an active wait
1218 * until it starts. It allows the viewer to start processing the trace
1219 * as soon as the session starts.
1221 if (ctx
->session
->stream_count
== 0) {
1225 printf_verbose("Waiting for %" PRIu64
" streams:\n",
1226 ctx
->session
->stream_count
);
1227 ctx
->session
->streams
= g_new0(struct lttng_live_viewer_stream
,
1228 ctx
->session
->stream_count
);
1229 for (i
= 0; i
< stream_count
; i
++) {
1231 ret_len
= recv(ctx
->control_sock
, &stream
, sizeof(stream
), 0);
1232 } while (ret_len
< 0 && errno
== EINTR
);
1234 fprintf(stderr
, "[error] Error receiving stream\n");
1238 assert(ret_len
== sizeof(stream
));
1239 stream
.path_name
[LTTNG_VIEWER_PATH_MAX
- 1] = '\0';
1240 stream
.channel_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
1242 printf_verbose(" stream %" PRIu64
" : %s/%s\n",
1243 be64toh(stream
.id
), stream
.path_name
,
1244 stream
.channel_name
);
1245 ctx
->session
->streams
[i
].id
= be64toh(stream
.id
);
1246 ctx
->session
->streams
[i
].session
= ctx
->session
;
1248 ctx
->session
->streams
[i
].first_read
= 1;
1249 ctx
->session
->streams
[i
].mmap_size
= 0;
1251 if (be32toh(stream
.metadata_flag
)) {
1254 path
= strdup(LTTNG_METADATA_PATH_TEMPLATE
);
1260 if (!mkdtemp(path
)) {
1266 ctx
->session
->streams
[i
].metadata_flag
= 1;
1267 snprintf(ctx
->session
->streams
[i
].path
,
1268 sizeof(ctx
->session
->streams
[i
].path
),
1270 stream
.channel_name
);
1271 ret
= open(ctx
->session
->streams
[i
].path
,
1272 O_WRONLY
| O_CREAT
| O_TRUNC
,
1273 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
);
1279 ctx
->session
->streams
[i
].fd
= ret
;
1282 ret
= lttng_live_ctf_trace_assign(&ctx
->session
->streams
[i
],
1283 be64toh(stream
.ctf_trace_id
));
1296 void lttng_live_read(struct lttng_live_ctx
*ctx
)
1300 struct bt_ctf_iter
*iter
;
1301 const struct bt_ctf_event
*event
;
1302 struct bt_iter_pos begin_pos
;
1303 struct bt_trace_descriptor
*td_write
;
1304 struct bt_format
*fmt_write
;
1305 struct ctf_text_stream_pos
*sout
;
1309 ctx
->bt_ctx
= bt_context_create();
1311 fprintf(stderr
, "[error] bt_context_create allocation\n");
1316 fmt_write
= bt_lookup_format(g_quark_from_static_string("text"));
1318 fprintf(stderr
, "[error] ctf-text error\n");
1322 td_write
= fmt_write
->open_trace(NULL
, O_RDWR
, NULL
, NULL
);
1324 fprintf(stderr
, "[error] Error opening output trace\n");
1328 sout
= container_of(td_write
, struct ctf_text_stream_pos
,
1330 if (!sout
->parent
.event_cb
)
1334 ret
= lttng_live_create_viewer_session(ctx
);
1339 for (i
= 0; i
< ctx
->session_ids
->len
; i
++) {
1340 id
= g_array_index(ctx
->session_ids
, uint64_t, i
);
1341 printf_verbose("Attaching to session %lu\n", id
);
1342 ret
= lttng_live_attach_session(ctx
, id
);
1343 printf_verbose("Attaching session returns %d\n", ret
);
1345 if (ret
== -LTTNG_VIEWER_ATTACH_UNK
) {
1346 fprintf(stderr
, "[error] Unknown session ID\n");
1353 * As long as the session is active, we try to get new streams.
1360 while (!ctx
->session
->stream_count
) {
1361 if (ctx
->session_ids
->len
== 0)
1363 ret
= ask_new_streams(ctx
);
1368 g_hash_table_foreach(ctx
->session
->ctf_traces
, add_traces
,
1372 begin_pos
.type
= BT_SEEK_BEGIN
;
1373 iter
= bt_ctf_iter_create(ctx
->bt_ctx
, &begin_pos
, NULL
);
1375 fprintf(stderr
, "[error] Iterator creation error\n");
1380 event
= bt_ctf_iter_read_event_flags(iter
, &flags
);
1381 if (!(flags
& BT_ITER_FLAG_RETRY
)) {
1386 ret
= sout
->parent
.event_cb(&sout
->parent
,
1387 event
->parent
->stream
);
1389 fprintf(stderr
, "[error] Writing "
1394 ret
= bt_iter_next(bt_ctf_get_iter(iter
));
1399 bt_ctf_iter_destroy(iter
);
1401 ret
= check_requirements(ctx
->bt_ctx
);
1403 fprintf(stderr
, "[error] some mandatory contexts "
1404 "were missing, exiting.\n");
1408 if (!opt_textdump
) {
1409 pthread_create(&display_thread
, NULL
, ncurses_display
,
1411 pthread_create(&timer_thread
, NULL
, refresh_thread
,
1414 iter_trace(ctx
->bt_ctx
);
1415 g_hash_table_foreach_remove(ctx
->session
->ctf_traces
,
1416 del_traces
, ctx
->bt_ctx
);
1417 ctx
->session
->stream_count
= 0;
1423 bt_context_put(ctx
->bt_ctx
);