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 "lttng-live-comm.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 perror("[error] Error sending cmd");
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 perror("[error] Error sending version");
145 assert(ret_len
== sizeof(connect
));
148 ret_len
= recv(ctx
->control_sock
, &connect
, sizeof(connect
), MSG_WAITALL
);
149 } while (ret_len
< 0 && errno
== EINTR
);
151 fprintf(stderr
, "[error] Remote side has closed connection\n");
156 perror("[error] Error receiving version");
160 assert(ret_len
== sizeof(connect
));
162 printf_verbose("Received viewer session ID : %" PRIu64
"\n",
163 be64toh(connect
.viewer_session_id
));
164 printf_verbose("Relayd version : %u.%u\n", be32toh(connect
.major
),
165 be32toh(connect
.minor
));
174 void free_session_list(GPtrArray
*session_list
)
177 struct lttng_live_relay_session
*relay_session
;
179 for (i
= 0; i
< session_list
->len
; i
++) {
180 relay_session
= g_ptr_array_index(session_list
, i
);
181 free(relay_session
->name
);
182 free(relay_session
->hostname
);
184 g_ptr_array_free(session_list
, TRUE
);
188 void print_session_list(GPtrArray
*session_list
, const char *path
)
191 struct lttng_live_relay_session
*relay_session
;
193 for (i
= 0; i
< session_list
->len
; i
++) {
194 relay_session
= g_ptr_array_index(session_list
, i
);
195 fprintf(stdout
, "%s/host/%s/%s (timer = %u, "
196 "%u stream(s), %u client(s) connected)\n",
197 path
, relay_session
->hostname
,
198 relay_session
->name
, relay_session
->timer
,
199 relay_session
->streams
, relay_session
->clients
);
204 void update_session_list(GPtrArray
*session_list
, char *hostname
,
205 char *session_name
, uint32_t streams
, uint32_t clients
,
209 struct lttng_live_relay_session
*relay_session
;
211 for (i
= 0; i
< session_list
->len
; i
++) {
212 relay_session
= g_ptr_array_index(session_list
, i
);
213 if ((strncmp(relay_session
->hostname
, hostname
, NAME_MAX
) == 0) &&
214 strncmp(relay_session
->name
,
215 session_name
, NAME_MAX
) == 0) {
216 relay_session
->streams
+= streams
;
217 if (relay_session
->clients
< clients
)
218 relay_session
->clients
= clients
;
226 relay_session
= g_new0(struct lttng_live_relay_session
, 1);
227 relay_session
->hostname
= strndup(hostname
, NAME_MAX
);
228 relay_session
->name
= strndup(session_name
, NAME_MAX
);
229 relay_session
->clients
= clients
;
230 relay_session
->streams
= streams
;
231 relay_session
->timer
= timer
;
232 g_ptr_array_add(session_list
, relay_session
);
235 int lttng_live_list_sessions(struct lttng_live_ctx
*ctx
, const char *path
)
237 struct lttng_viewer_cmd cmd
;
238 struct lttng_viewer_list_sessions list
;
239 struct lttng_viewer_session lsession
;
240 int i
, ret
, sessions_count
, print_list
= 0;
243 GPtrArray
*session_list
= NULL
;
245 if (strlen(ctx
->session_name
) == 0) {
247 session_list
= g_ptr_array_new();
250 cmd
.cmd
= htobe32(LTTNG_VIEWER_LIST_SESSIONS
);
255 ret_len
= send(ctx
->control_sock
, &cmd
, sizeof(cmd
), 0);
256 } while (ret_len
< 0 && errno
== EINTR
);
258 perror("[error] Error sending cmd");
262 assert(ret_len
== sizeof(cmd
));
265 ret_len
= recv(ctx
->control_sock
, &list
, sizeof(list
), MSG_WAITALL
);
266 } while (ret_len
< 0 && errno
== EINTR
);
268 fprintf(stderr
, "[error] Remote side has closed connection\n");
273 perror("[error] Error receiving session list");
277 assert(ret_len
== sizeof(list
));
279 sessions_count
= be32toh(list
.sessions_count
);
280 for (i
= 0; i
< sessions_count
; i
++) {
282 ret_len
= recv(ctx
->control_sock
, &lsession
, sizeof(lsession
), MSG_WAITALL
);
283 } while (ret_len
< 0 && errno
== EINTR
);
285 fprintf(stderr
, "[error] Remote side has closed connection\n");
290 perror("[error] Error receiving session");
294 assert(ret_len
== sizeof(lsession
));
295 lsession
.hostname
[LTTNG_VIEWER_HOST_NAME_MAX
- 1] = '\0';
296 lsession
.session_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
297 session_id
= be64toh(lsession
.id
);
300 update_session_list(session_list
,
302 lsession
.session_name
,
303 be32toh(lsession
.streams
),
304 be32toh(lsession
.clients
),
305 be32toh(lsession
.live_timer
));
307 if ((strncmp(lsession
.session_name
, ctx
->session_name
,
308 NAME_MAX
) == 0) && (strncmp(lsession
.hostname
,
309 ctx
->traced_hostname
, NAME_MAX
) == 0)) {
310 printf_verbose("Reading from session %" PRIu64
"\n",
312 g_array_append_val(ctx
->session_ids
,
319 print_session_list(session_list
, path
);
320 free_session_list(session_list
);
329 int lttng_live_ctf_trace_assign(struct lttng_live_viewer_stream
*stream
,
330 uint64_t ctf_trace_id
)
332 struct lttng_live_ctf_trace
*trace
;
335 trace
= g_hash_table_lookup(stream
->session
->ctf_traces
,
336 (gpointer
) ctf_trace_id
);
338 trace
= g_new0(struct lttng_live_ctf_trace
, 1);
339 trace
->ctf_trace_id
= ctf_trace_id
;
340 trace
->streams
= g_ptr_array_new();
341 g_hash_table_insert(stream
->session
->ctf_traces
,
342 (gpointer
) ctf_trace_id
,
345 if (stream
->metadata_flag
)
346 trace
->metadata_stream
= stream
;
348 stream
->ctf_trace
= trace
;
349 g_ptr_array_add(trace
->streams
, stream
);
354 int lttng_live_attach_session(struct lttng_live_ctx
*ctx
, uint64_t id
)
356 struct lttng_viewer_cmd cmd
;
357 struct lttng_viewer_attach_session_request rq
;
358 struct lttng_viewer_attach_session_response rp
;
359 struct lttng_viewer_stream stream
;
363 cmd
.cmd
= htobe32(LTTNG_VIEWER_ATTACH_SESSION
);
364 cmd
.data_size
= sizeof(rq
);
367 memset(&rq
, 0, sizeof(rq
));
368 rq
.session_id
= htobe64(id
);
369 // TODO: add cmd line parameter to select seek beginning
370 //rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING);
371 rq
.seek
= htobe32(LTTNG_VIEWER_SEEK_LAST
);
374 ret_len
= send(ctx
->control_sock
, &cmd
, sizeof(cmd
), 0);
375 } while (ret_len
< 0 && errno
== EINTR
);
377 perror("[error] Error sending cmd");
381 assert(ret_len
== sizeof(cmd
));
384 ret_len
= send(ctx
->control_sock
, &rq
, sizeof(rq
), 0);
385 } while (ret_len
< 0 && errno
== EINTR
);
387 perror("[error] Error sending attach request");
391 assert(ret_len
== sizeof(rq
));
394 ret_len
= recv(ctx
->control_sock
, &rp
, sizeof(rp
), MSG_WAITALL
);
395 } while (ret_len
< 0 && errno
== EINTR
);
397 fprintf(stderr
, "[error] Remote side has closed connection\n");
402 perror("[error] Error receiving attach response");
406 assert(ret_len
== sizeof(rp
));
408 switch(be32toh(rp
.status
)) {
409 case LTTNG_VIEWER_ATTACH_OK
:
411 case LTTNG_VIEWER_ATTACH_UNK
:
412 ret
= -LTTNG_VIEWER_ATTACH_UNK
;
414 case LTTNG_VIEWER_ATTACH_ALREADY
:
415 fprintf(stderr
, "[error] There is already a viewer attached to this session\n");
418 case LTTNG_VIEWER_ATTACH_NOT_LIVE
:
419 fprintf(stderr
, "[error] Not a live session\n");
422 case LTTNG_VIEWER_ATTACH_SEEK_ERR
:
423 fprintf(stderr
, "[error] Wrong seek parameter\n");
427 fprintf(stderr
, "[error] Unknown attach return code %u\n",
432 if (be32toh(rp
.status
) != LTTNG_VIEWER_ATTACH_OK
) {
437 ctx
->session
->stream_count
+= be32toh(rp
.streams_count
);
439 * When the session is created but not started, we do an active wait
440 * until it starts. It allows the viewer to start processing the trace
441 * as soon as the session starts.
443 if (ctx
->session
->stream_count
== 0) {
447 printf_verbose("Waiting for %u streams:\n",
448 be32toh(rp
.streams_count
));
449 ctx
->session
->streams
= g_new0(struct lttng_live_viewer_stream
,
450 ctx
->session
->stream_count
);
451 for (i
= 0; i
< be32toh(rp
.streams_count
); i
++) {
453 ret_len
= recv(ctx
->control_sock
, &stream
, sizeof(stream
), MSG_WAITALL
);
454 } while (ret_len
< 0 && errno
== EINTR
);
456 fprintf(stderr
, "[error] Remote side has closed connection\n");
461 perror("[error] Error receiving stream");
465 assert(ret_len
== sizeof(stream
));
466 stream
.path_name
[LTTNG_VIEWER_PATH_MAX
- 1] = '\0';
467 stream
.channel_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
469 printf_verbose(" stream %" PRIu64
" : %s/%s\n",
470 be64toh(stream
.id
), stream
.path_name
,
471 stream
.channel_name
);
472 ctx
->session
->streams
[i
].id
= be64toh(stream
.id
);
473 ctx
->session
->streams
[i
].session
= ctx
->session
;
475 ctx
->session
->streams
[i
].first_read
= 1;
476 ctx
->session
->streams
[i
].mmap_size
= 0;
478 if (be32toh(stream
.metadata_flag
)) {
481 path
= strdup(LTTNG_METADATA_PATH_TEMPLATE
);
487 if (!mkdtemp(path
)) {
493 ctx
->session
->streams
[i
].metadata_flag
= 1;
494 snprintf(ctx
->session
->streams
[i
].path
,
495 sizeof(ctx
->session
->streams
[i
].path
),
497 stream
.channel_name
);
498 ret
= open(ctx
->session
->streams
[i
].path
,
499 O_WRONLY
| O_CREAT
| O_TRUNC
,
500 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
);
506 ctx
->session
->streams
[i
].fd
= ret
;
509 ret
= lttng_live_ctf_trace_assign(&ctx
->session
->streams
[i
],
510 be64toh(stream
.ctf_trace_id
));
524 int ask_new_streams(struct lttng_live_ctx
*ctx
)
530 for (i
= 0; i
< ctx
->session_ids
->len
; i
++) {
531 id
= g_array_index(ctx
->session_ids
, uint64_t, i
);
532 ret
= lttng_live_get_new_streams(ctx
, id
);
533 printf_verbose("Asking for new streams returns %d\n",
536 if (ret
== -LTTNG_VIEWER_NEW_STREAMS_HUP
) {
537 printf_verbose("Session %" PRIu64
" closed\n",
540 * The streams have already been closed during
541 * the reading, so we only need to get rid of
542 * the trace in our internal table of sessions.
544 g_array_remove_index(ctx
->session_ids
, i
);
546 * We can't continue iterating on the g_array
547 * after a remove, we have to start again.
562 int get_data_packet(struct lttng_live_ctx
*ctx
,
563 struct ctf_stream_pos
*pos
,
564 struct lttng_live_viewer_stream
*stream
, uint64_t offset
,
567 struct lttng_viewer_cmd cmd
;
568 struct lttng_viewer_get_packet rq
;
569 struct lttng_viewer_trace_packet rp
;
573 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_PACKET
);
574 cmd
.data_size
= sizeof(rq
);
577 memset(&rq
, 0, sizeof(rq
));
578 rq
.stream_id
= htobe64(stream
->id
);
579 /* Already in big endian. */
581 rq
.len
= htobe32(len
);
584 ret_len
= send(ctx
->control_sock
, &cmd
, sizeof(cmd
), 0);
585 } while (ret_len
< 0 && errno
== EINTR
);
587 perror("[error] Error sending cmd");
591 assert(ret_len
== sizeof(cmd
));
594 ret_len
= send(ctx
->control_sock
, &rq
, sizeof(rq
), 0);
595 } while (ret_len
< 0 && errno
== EINTR
);
597 perror("[error] Error sending get_data_packet request");
601 assert(ret_len
== sizeof(rq
));
604 ret_len
= recv(ctx
->control_sock
, &rp
, sizeof(rp
), MSG_WAITALL
);
605 } while (ret_len
< 0 && errno
== EINTR
);
607 fprintf(stderr
, "[error] Remote side has closed connection\n");
612 perror("[error] Error receiving data response");
616 if (ret_len
!= sizeof(rp
)) {
617 fprintf(stderr
, "[error] get_data_packet: expected %" PRId64
618 ", received %" PRId64
"\n", ret_len
,
624 rp
.flags
= be32toh(rp
.flags
);
626 switch (be32toh(rp
.status
)) {
627 case LTTNG_VIEWER_GET_PACKET_OK
:
628 len
= be32toh(rp
.len
);
629 printf_verbose("get_data_packet: Ok, packet size : %" PRIu64
632 case LTTNG_VIEWER_GET_PACKET_RETRY
:
633 printf_verbose("get_data_packet: retry\n");
636 case LTTNG_VIEWER_GET_PACKET_ERR
:
637 if (rp
.flags
& LTTNG_VIEWER_FLAG_NEW_METADATA
) {
638 printf_verbose("get_data_packet: new metadata needed\n");
642 if (rp
.flags
& LTTNG_VIEWER_FLAG_NEW_STREAM
) {
643 printf_verbose("get_data_packet: new streams needed\n");
644 ret
= ask_new_streams(ctx
);
647 g_hash_table_foreach(ctx
->session
->ctf_traces
, add_traces
,
652 fprintf(stderr
, "[error] get_data_packet: error\n");
655 case LTTNG_VIEWER_GET_PACKET_EOF
:
659 printf_verbose("get_data_packet: unknown\n");
670 if (len
> stream
->mmap_size
) {
673 new_size
= max_t(uint64_t, len
, stream
->mmap_size
<< 1);
676 ret
= munmap_align(pos
->base_mma
);
678 perror("[error] Unable to unmap old base");
682 pos
->base_mma
= NULL
;
684 pos
->base_mma
= mmap_align(new_size
,
685 PROT_READ
| PROT_WRITE
,
686 MAP_PRIVATE
| MAP_ANONYMOUS
, -1, 0);
687 if (pos
->base_mma
== MAP_FAILED
) {
688 perror("[error] mmap error");
689 pos
->base_mma
= NULL
;
694 stream
->mmap_size
= new_size
;
695 printf_verbose("Expanding stream mmap size to %" PRIu64
" bytes\n",
700 ret_len
= recv(ctx
->control_sock
,
701 mmap_align_addr(pos
->base_mma
), len
,
703 } while (ret_len
< 0 && errno
== EINTR
);
705 fprintf(stderr
, "[error] Remote side has closed connection\n");
710 perror("[error] Error receiving trace packet");
714 assert(ret_len
== len
);
722 * Return number of metadata bytes written or a negative value on error.
725 int get_new_metadata(struct lttng_live_ctx
*ctx
,
726 struct lttng_live_viewer_stream
*viewer_stream
,
727 uint64_t *metadata_len
)
731 struct lttng_viewer_cmd cmd
;
732 struct lttng_viewer_get_metadata rq
;
733 struct lttng_viewer_metadata_packet rp
;
734 struct lttng_live_viewer_stream
*metadata_stream
;
738 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_METADATA
);
739 cmd
.data_size
= sizeof(rq
);
742 metadata_stream
= viewer_stream
->ctf_trace
->metadata_stream
;
743 rq
.stream_id
= htobe64(metadata_stream
->id
);
746 ret_len
= send(ctx
->control_sock
, &cmd
, sizeof(cmd
), 0);
747 } while (ret_len
< 0 && errno
== EINTR
);
749 perror("[error] Error sending cmd");
753 assert(ret_len
== sizeof(cmd
));
756 ret_len
= send(ctx
->control_sock
, &rq
, sizeof(rq
), 0);
757 } while (ret_len
< 0 && errno
== EINTR
);
759 perror("[error] Error sending get_metadata request");
763 assert(ret_len
== sizeof(rq
));
766 ret_len
= recv(ctx
->control_sock
, &rp
, sizeof(rp
), MSG_WAITALL
);
767 } while (ret_len
< 0 && errno
== EINTR
);
769 fprintf(stderr
, "[error] Remote side has closed connection\n");
774 perror("[error] Error receiving metadata response");
778 assert(ret_len
== sizeof(rp
));
780 switch (be32toh(rp
.status
)) {
781 case LTTNG_VIEWER_METADATA_OK
:
782 printf_verbose("get_metadata : OK\n");
784 case LTTNG_VIEWER_NO_NEW_METADATA
:
785 printf_verbose("get_metadata : NO NEW\n");
788 case LTTNG_VIEWER_METADATA_ERR
:
789 printf_verbose("get_metadata : ERR\n");
793 printf_verbose("get_metadata : UNKNOWN\n");
798 len
= be64toh(rp
.len
);
799 printf_verbose("Writing %" PRIu64
" bytes to metadata\n", len
);
807 perror("relay data zmalloc");
812 ret_len
= recv(ctx
->control_sock
, data
, len
, MSG_WAITALL
);
813 } while (ret_len
< 0 && errno
== EINTR
);
815 fprintf(stderr
, "[error] Remote side has closed connection\n");
821 perror("[error] Error receiving trace packet");
826 assert(ret_len
== len
);
829 ret_len
= write(metadata_stream
->fd
, data
, len
);
830 } while (ret_len
< 0 && errno
== EINTR
);
836 assert(ret_len
== len
);
848 * Get one index for a stream.
850 * Returns 0 on success or a negative value on error.
853 int get_next_index(struct lttng_live_ctx
*ctx
,
854 struct lttng_live_viewer_stream
*viewer_stream
,
855 struct packet_index
*index
)
857 struct lttng_viewer_cmd cmd
;
858 struct lttng_viewer_get_next_index rq
;
859 struct lttng_viewer_index rp
;
861 uint64_t metadata_len
;
864 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_NEXT_INDEX
);
865 cmd
.data_size
= sizeof(rq
);
868 memset(&rq
, 0, sizeof(rq
));
869 rq
.stream_id
= htobe64(viewer_stream
->id
);
873 ret_len
= send(ctx
->control_sock
, &cmd
, sizeof(cmd
), 0);
874 } while (ret_len
< 0 && errno
== EINTR
);
876 perror("[error] Error sending cmd");
880 assert(ret_len
== sizeof(cmd
));
883 ret_len
= send(ctx
->control_sock
, &rq
, sizeof(rq
), 0);
884 } while (ret_len
< 0 && errno
== EINTR
);
886 perror("[error] Error sending get_next_index request");
890 assert(ret_len
== sizeof(rq
));
893 ret_len
= recv(ctx
->control_sock
, &rp
, sizeof(rp
), MSG_WAITALL
);
894 } while (ret_len
< 0 && errno
== EINTR
);
896 fprintf(stderr
, "[error] Remote side has closed connection\n");
901 perror("[error] Error receiving index response");
905 assert(ret_len
== sizeof(rp
));
907 rp
.flags
= be32toh(rp
.flags
);
909 switch (be32toh(rp
.status
)) {
910 case LTTNG_VIEWER_INDEX_INACTIVE
:
911 printf_verbose("get_next_index: inactive\n");
912 memset(index
, 0, sizeof(struct packet_index
));
913 index
->ts_cycles
.timestamp_end
= be64toh(rp
.timestamp_end
);
915 case LTTNG_VIEWER_INDEX_OK
:
916 printf_verbose("get_next_index: Ok, need metadata update : %u\n",
917 rp
.flags
& LTTNG_VIEWER_FLAG_NEW_METADATA
);
918 index
->offset
= be64toh(rp
.offset
);
919 index
->packet_size
= be64toh(rp
.packet_size
);
920 index
->content_size
= be64toh(rp
.content_size
);
921 index
->ts_cycles
.timestamp_begin
= be64toh(rp
.timestamp_begin
);
922 index
->ts_cycles
.timestamp_end
= be64toh(rp
.timestamp_end
);
923 index
->events_discarded
= be64toh(rp
.events_discarded
);
925 if (rp
.flags
& LTTNG_VIEWER_FLAG_NEW_METADATA
) {
926 printf_verbose("get_next_index: new metadata needed\n");
927 ret
= get_new_metadata(ctx
, viewer_stream
,
933 if (rp
.flags
& LTTNG_VIEWER_FLAG_NEW_STREAM
) {
934 ret
= ask_new_streams(ctx
);
937 g_hash_table_foreach(ctx
->session
->ctf_traces
, add_traces
,
941 case LTTNG_VIEWER_INDEX_RETRY
:
942 printf_verbose("get_next_index: retry\n");
945 case LTTNG_VIEWER_INDEX_HUP
:
946 printf_verbose("get_next_index: stream hung up\n");
947 viewer_stream
->id
= -1ULL;
948 viewer_stream
->fd
= -1;
950 ctx
->session
->stream_count
--;
952 case LTTNG_VIEWER_INDEX_ERR
:
953 fprintf(stderr
, "[error] get_next_index: error\n");
957 fprintf(stderr
, "[error] get_next_index: unkwown value\n");
969 void ctf_live_packet_seek(struct bt_stream_pos
*stream_pos
, size_t index
,
972 struct ctf_stream_pos
*pos
;
973 struct ctf_file_stream
*file_stream
;
974 struct packet_index
*prev_index
= NULL
, *cur_index
;
975 struct lttng_live_viewer_stream
*viewer_stream
;
976 struct lttng_live_session
*session
;
980 pos
= ctf_pos(stream_pos
);
981 file_stream
= container_of(pos
, struct ctf_file_stream
, pos
);
982 viewer_stream
= (struct lttng_live_viewer_stream
*) pos
->priv
;
983 session
= viewer_stream
->session
;
985 switch (pos
->packet_index
->len
) {
987 g_array_set_size(pos
->packet_index
, 1);
988 cur_index
= &g_array_index(pos
->packet_index
,
989 struct packet_index
, 0);
992 g_array_set_size(pos
->packet_index
, 2);
993 prev_index
= &g_array_index(pos
->packet_index
,
994 struct packet_index
, 0);
995 cur_index
= &g_array_index(pos
->packet_index
,
996 struct packet_index
, 1);
999 g_array_index(pos
->packet_index
,
1000 struct packet_index
, 0) =
1001 g_array_index(pos
->packet_index
,
1002 struct packet_index
, 1);
1003 prev_index
= &g_array_index(pos
->packet_index
,
1004 struct packet_index
, 0);
1005 cur_index
= &g_array_index(pos
->packet_index
,
1006 struct packet_index
, 1);
1013 printf_verbose("get_next_index for stream %" PRIu64
"\n", viewer_stream
->id
);
1014 ret
= get_next_index(session
->ctx
, viewer_stream
, cur_index
);
1017 fprintf(stderr
, "[error] get_next_index failed\n");
1021 pos
->packet_size
= cur_index
->packet_size
;
1022 pos
->content_size
= cur_index
->content_size
;
1023 pos
->mmap_base_offset
= 0;
1024 if (cur_index
->offset
== EOF
) {
1030 if (cur_index
->content_size
== 0) {
1031 file_stream
->parent
.cycles_timestamp
=
1032 cur_index
->ts_cycles
.timestamp_end
;
1033 file_stream
->parent
.real_timestamp
= ctf_get_real_timestamp(
1034 &file_stream
->parent
,
1035 cur_index
->ts_cycles
.timestamp_end
);
1037 /* Convert the timestamps and append to the real_index. */
1038 cur_index
->ts_real
.timestamp_begin
= ctf_get_real_timestamp(
1039 &file_stream
->parent
,
1040 cur_index
->ts_cycles
.timestamp_begin
);
1041 cur_index
->ts_real
.timestamp_end
= ctf_get_real_timestamp(
1042 &file_stream
->parent
,
1043 cur_index
->ts_cycles
.timestamp_end
);
1045 ctf_update_current_packet_index(&file_stream
->parent
,
1046 prev_index
, cur_index
);
1048 file_stream
->parent
.cycles_timestamp
=
1049 cur_index
->ts_cycles
.timestamp_begin
;
1050 file_stream
->parent
.real_timestamp
=
1051 cur_index
->ts_real
.timestamp_begin
;
1054 if (pos
->packet_size
== 0 || pos
->offset
== EOF
) {
1058 printf_verbose("get_data_packet for stream %" PRIu64
"\n",
1060 ret
= get_data_packet(session
->ctx
, pos
, viewer_stream
,
1061 be64toh(cur_index
->offset
),
1062 cur_index
->packet_size
/ CHAR_BIT
);
1065 } else if (ret
< 0) {
1067 fprintf(stderr
, "[error] get_data_packet failed\n");
1071 printf_verbose("Index received : packet_size : %" PRIu64
1072 ", offset %" PRIu64
", content_size %" PRIu64
1073 ", timestamp_end : %" PRIu64
"\n",
1074 cur_index
->packet_size
, cur_index
->offset
,
1075 cur_index
->content_size
,
1076 cur_index
->ts_cycles
.timestamp_end
);
1078 /* update trace_packet_header and stream_packet_context */
1079 if (pos
->prot
!= PROT_WRITE
&& file_stream
->parent
.trace_packet_header
) {
1080 /* Read packet header */
1081 ret
= generic_rw(&pos
->parent
, &file_stream
->parent
.trace_packet_header
->p
);
1084 fprintf(stderr
, "[error] trace packet header read failed\n");
1088 if (pos
->prot
!= PROT_WRITE
&& file_stream
->parent
.stream_packet_context
) {
1089 /* Read packet context */
1090 ret
= generic_rw(&pos
->parent
, &file_stream
->parent
.stream_packet_context
->p
);
1093 fprintf(stderr
, "[error] stream packet context read failed\n");
1097 pos
->data_offset
= pos
->offset
;
1103 int lttng_live_create_viewer_session(struct lttng_live_ctx
*ctx
)
1105 struct lttng_viewer_cmd cmd
;
1106 struct lttng_viewer_create_session_response resp
;
1110 cmd
.cmd
= htobe32(LTTNG_VIEWER_CREATE_SESSION
);
1112 cmd
.cmd_version
= 0;
1115 ret_len
= send(ctx
->control_sock
, &cmd
, sizeof(cmd
), 0);
1116 } while (ret_len
< 0 && errno
== EINTR
);
1118 perror("[error] Error sending cmd");
1122 assert(ret_len
== sizeof(cmd
));
1125 ret_len
= recv(ctx
->control_sock
, &resp
, sizeof(resp
), MSG_WAITALL
);
1126 } while (ret_len
< 0 && errno
== EINTR
);
1128 fprintf(stderr
, "[error] Remote side has closed connection\n");
1133 perror("[error] Error receiving create session reply");
1137 assert(ret_len
== sizeof(resp
));
1139 if (be32toh(resp
.status
) != LTTNG_VIEWER_CREATE_SESSION_OK
) {
1140 fprintf(stderr
, "[error] Error creating viewer session\n");
1151 int del_traces(gpointer key
, gpointer value
, gpointer user_data
)
1153 struct bt_context
*bt_ctx
= user_data
;
1154 struct lttng_live_ctf_trace
*trace
= value
;
1157 ret
= bt_context_remove_trace(bt_ctx
, trace
->trace_id
);
1159 fprintf(stderr
, "[error] removing trace from context\n");
1161 /* remove the key/value pair from the HT. */
1166 void add_traces(gpointer key
, gpointer value
, gpointer user_data
)
1168 int i
, ret
, total_metadata
= 0;
1169 uint64_t metadata_len
;
1170 struct bt_context
*bt_ctx
= user_data
;
1171 struct lttng_live_ctf_trace
*trace
= value
;
1172 struct lttng_live_viewer_stream
*stream
;
1173 struct bt_mmap_stream
*new_mmap_stream
;
1174 struct bt_mmap_stream_list mmap_list
;
1175 struct lttng_live_ctx
*ctx
= NULL
;
1178 * We don't know how many streams we will receive for a trace, so
1179 * once we are done receiving the traces, we add all the traces
1180 * received to the bt_context.
1181 * We can receive streams during the attach command or the
1182 * get_new_streams, so we have to make sure not to add multiple
1183 * times the same traces.
1184 * If a trace is already in the context, we just skip this function.
1189 BT_INIT_LIST_HEAD(&mmap_list
.head
);
1191 for (i
= 0; i
< trace
->streams
->len
; i
++) {
1192 stream
= g_ptr_array_index(trace
->streams
, i
);
1193 ctx
= stream
->session
->ctx
;
1195 if (!stream
->metadata_flag
) {
1196 new_mmap_stream
= zmalloc(sizeof(struct bt_mmap_stream
));
1197 new_mmap_stream
->priv
= (void *) stream
;
1198 new_mmap_stream
->fd
= -1;
1199 bt_list_add(&new_mmap_stream
->list
, &mmap_list
.head
);
1201 /* Get all possible metadata before starting */
1203 ret
= get_new_metadata(ctx
, stream
,
1206 total_metadata
+= metadata_len
;
1208 } while (ret
== 0 || total_metadata
== 0);
1209 trace
->metadata_fp
= fopen(stream
->path
, "r");
1213 if (!trace
->metadata_fp
) {
1214 fprintf(stderr
, "[error] No metadata stream opened\n");
1218 ret
= bt_context_add_trace(bt_ctx
, NULL
, "ctf",
1219 ctf_live_packet_seek
, &mmap_list
, trace
->metadata_fp
);
1221 fprintf(stderr
, "[error] Error adding trace\n");
1225 if (bt_ctx
->current_iterator
) {
1226 struct bt_trace_descriptor
*td
;
1227 struct bt_trace_handle
*handle
;
1229 handle
= (struct bt_trace_handle
*) g_hash_table_lookup(
1230 bt_ctx
->trace_handles
,
1231 (gpointer
) (unsigned long) ret
);
1233 bt_iter_add_trace(bt_ctx
->current_iterator
, td
);
1236 trace
->trace_id
= ret
;
1242 bt_context_put(bt_ctx
);
1247 int lttng_live_get_new_streams(struct lttng_live_ctx
*ctx
, uint64_t id
)
1249 struct lttng_viewer_cmd cmd
;
1250 struct lttng_viewer_new_streams_request rq
;
1251 struct lttng_viewer_new_streams_response rp
;
1252 struct lttng_viewer_stream stream
;
1255 uint32_t stream_count
;
1257 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_NEW_STREAMS
);
1258 cmd
.data_size
= sizeof(rq
);
1259 cmd
.cmd_version
= 0;
1261 memset(&rq
, 0, sizeof(rq
));
1262 rq
.session_id
= htobe64(id
);
1265 ret_len
= send(ctx
->control_sock
, &cmd
, sizeof(cmd
), 0);
1266 } while (ret_len
< 0 && errno
== EINTR
);
1268 perror("[error] Error sending cmd");
1272 assert(ret_len
== sizeof(cmd
));
1275 ret_len
= send(ctx
->control_sock
, &rq
, sizeof(rq
), 0);
1276 } while (ret_len
< 0 && errno
== EINTR
);
1278 perror("[error] Error sending get_new_streams request");
1282 assert(ret_len
== sizeof(rq
));
1285 ret_len
= recv(ctx
->control_sock
, &rp
, sizeof(rp
), MSG_WAITALL
);
1286 } while (ret_len
< 0 && errno
== EINTR
);
1288 fprintf(stderr
, "[error] Remote side has closed connection\n");
1293 perror("[error] Error receiving get_new_streams response");
1297 assert(ret_len
== sizeof(rp
));
1299 switch(be32toh(rp
.status
)) {
1300 case LTTNG_VIEWER_NEW_STREAMS_OK
:
1302 case LTTNG_VIEWER_NEW_STREAMS_NO_NEW
:
1305 case LTTNG_VIEWER_NEW_STREAMS_HUP
:
1306 ret
= -LTTNG_VIEWER_NEW_STREAMS_HUP
;
1308 case LTTNG_VIEWER_NEW_STREAMS_ERR
:
1309 fprintf(stderr
, "[error] get_new_streams error\n");
1313 fprintf(stderr
, "[error] Unknown return code %u\n",
1314 be32toh(rp
.status
));
1319 stream_count
= be32toh(rp
.streams_count
);
1320 ctx
->session
->stream_count
+= stream_count
;
1322 * When the session is created but not started, we do an active wait
1323 * until it starts. It allows the viewer to start processing the trace
1324 * as soon as the session starts.
1326 if (ctx
->session
->stream_count
== 0) {
1330 printf_verbose("Waiting for %" PRIu64
" streams:\n",
1331 ctx
->session
->stream_count
);
1332 ctx
->session
->streams
= g_new0(struct lttng_live_viewer_stream
,
1333 ctx
->session
->stream_count
);
1334 for (i
= 0; i
< stream_count
; i
++) {
1336 ret_len
= recv(ctx
->control_sock
, &stream
, sizeof(stream
), MSG_WAITALL
);
1337 } while (ret_len
< 0 && errno
== EINTR
);
1339 fprintf(stderr
, "[error] Remote side has closed connection\n");
1344 perror("[error] Error receiving stream");
1348 assert(ret_len
== sizeof(stream
));
1349 stream
.path_name
[LTTNG_VIEWER_PATH_MAX
- 1] = '\0';
1350 stream
.channel_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
1352 printf_verbose(" stream %" PRIu64
" : %s/%s\n",
1353 be64toh(stream
.id
), stream
.path_name
,
1354 stream
.channel_name
);
1355 ctx
->session
->streams
[i
].id
= be64toh(stream
.id
);
1356 ctx
->session
->streams
[i
].session
= ctx
->session
;
1358 ctx
->session
->streams
[i
].first_read
= 1;
1359 ctx
->session
->streams
[i
].mmap_size
= 0;
1361 if (be32toh(stream
.metadata_flag
)) {
1364 path
= strdup(LTTNG_METADATA_PATH_TEMPLATE
);
1370 if (!mkdtemp(path
)) {
1376 ctx
->session
->streams
[i
].metadata_flag
= 1;
1377 snprintf(ctx
->session
->streams
[i
].path
,
1378 sizeof(ctx
->session
->streams
[i
].path
),
1380 stream
.channel_name
);
1381 ret
= open(ctx
->session
->streams
[i
].path
,
1382 O_WRONLY
| O_CREAT
| O_TRUNC
,
1383 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
);
1389 ctx
->session
->streams
[i
].fd
= ret
;
1392 ret
= lttng_live_ctf_trace_assign(&ctx
->session
->streams
[i
],
1393 be64toh(stream
.ctf_trace_id
));
1406 void lttng_live_read(struct lttng_live_ctx
*ctx
)
1410 struct bt_ctf_iter
*iter
;
1411 const struct bt_ctf_event
*event
;
1412 struct bt_iter_pos begin_pos
;
1413 struct bt_trace_descriptor
*td_write
;
1414 struct bt_format
*fmt_write
;
1415 struct ctf_text_stream_pos
*sout
;
1419 ctx
->bt_ctx
= bt_context_create();
1421 fprintf(stderr
, "[error] bt_context_create allocation\n");
1426 fmt_write
= bt_lookup_format(g_quark_from_static_string("text"));
1428 fprintf(stderr
, "[error] ctf-text error\n");
1432 td_write
= fmt_write
->open_trace(NULL
, O_RDWR
, NULL
, NULL
);
1434 fprintf(stderr
, "[error] Error opening output trace\n");
1438 sout
= container_of(td_write
, struct ctf_text_stream_pos
,
1440 if (!sout
->parent
.event_cb
)
1444 ret
= lttng_live_create_viewer_session(ctx
);
1449 for (i
= 0; i
< ctx
->session_ids
->len
; i
++) {
1450 id
= g_array_index(ctx
->session_ids
, uint64_t, i
);
1451 printf_verbose("Attaching to session %lu\n", id
);
1452 ret
= lttng_live_attach_session(ctx
, id
);
1453 printf_verbose("Attaching session returns %d\n", ret
);
1455 if (ret
== -LTTNG_VIEWER_ATTACH_UNK
) {
1456 fprintf(stderr
, "[error] Unknown session ID\n");
1463 * As long as the session is active, we try to get new streams.
1470 while (!ctx
->session
->stream_count
) {
1471 if (ctx
->session_ids
->len
== 0)
1473 ret
= ask_new_streams(ctx
);
1478 g_hash_table_foreach(ctx
->session
->ctf_traces
, add_traces
,
1482 begin_pos
.type
= BT_SEEK_BEGIN
;
1483 iter
= bt_ctf_iter_create(ctx
->bt_ctx
, &begin_pos
, NULL
);
1485 fprintf(stderr
, "[error] Iterator creation error\n");
1490 event
= bt_ctf_iter_read_event_flags(iter
, &flags
);
1491 if (!(flags
& BT_ITER_FLAG_RETRY
)) {
1496 ret
= sout
->parent
.event_cb(&sout
->parent
,
1497 event
->parent
->stream
);
1499 fprintf(stderr
, "[error] Writing "
1504 ret
= bt_iter_next(bt_ctf_get_iter(iter
));
1509 bt_ctf_iter_destroy(iter
);
1511 ret
= check_requirements(ctx
->bt_ctx
);
1512 if (ret
< 0 && !valid_trace
) {
1513 fprintf(stderr
, "[error] some mandatory contexts "
1514 "were missing, exiting.\n");
1518 if (!opt_textdump
) {
1519 #ifdef HAVE_LIBNCURSES
1520 pthread_create(&display_thread
, NULL
, ncurses_display
,
1522 pthread_create(&timer_thread
, NULL
, refresh_thread
,
1525 printf("Ncurses support not compiled, please install "
1526 "the missing dependencies and recompile\n");
1530 iter_trace(ctx
->bt_ctx
);
1531 g_hash_table_foreach_remove(ctx
->session
->ctf_traces
,
1532 del_traces
, ctx
->bt_ctx
);
1533 ctx
->session
->stream_count
= 0;
1539 bt_context_put(ctx
->bt_ctx
);