2 * Copyright (C) 2012 - Julien Desfossez <jdesfossez@efficios.com>
3 * David Goulet <dgoulet@efficios.com>
4 * 2013 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License, version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
30 #include <sys/mount.h>
31 #include <sys/resource.h>
32 #include <sys/socket.h>
34 #include <sys/types.h>
37 #include <urcu/futex.h>
38 #include <urcu/uatomic.h>
43 #include <lttng/lttng.h>
44 #include <common/common.h>
45 #include <common/compat/poll.h>
46 #include <common/compat/socket.h>
47 #include <common/compat/endian.h>
48 #include <common/defaults.h>
49 #include <common/daemonize.h>
50 #include <common/futex.h>
51 #include <common/sessiond-comm/sessiond-comm.h>
52 #include <common/sessiond-comm/inet.h>
53 #include <common/sessiond-comm/relayd.h>
54 #include <common/uri.h>
55 #include <common/utils.h>
56 #include <common/config/config.h>
59 #include "ctf-trace.h"
62 #include "lttng-relayd.h"
64 #include "health-relayd.h"
65 #include "testpoint.h"
66 #include "viewer-stream.h"
69 #include "connection.h"
71 /* command line options */
72 char *opt_output_path
;
73 static int opt_daemon
, opt_background
;
76 * We need to wait for listener and live listener threads, as well as
77 * health check thread, before being ready to signal readiness.
79 #define NR_LTTNG_RELAY_READY 3
80 static int lttng_relay_ready
= NR_LTTNG_RELAY_READY
;
81 static int recv_child_signal
; /* Set to 1 when a SIGUSR1 signal is received. */
82 static pid_t child_ppid
; /* Internal parent PID use with daemonize. */
84 static struct lttng_uri
*control_uri
;
85 static struct lttng_uri
*data_uri
;
86 static struct lttng_uri
*live_uri
;
90 const char *tracing_group_name
= DEFAULT_TRACING_GROUP
;
91 static int tracing_group_name_override
;
93 const char * const config_section_name
= "relayd";
96 * Quit pipe for all threads. This permits a single cancellation point
97 * for all threads when receiving an event on the pipe.
99 int thread_quit_pipe
[2] = { -1, -1 };
102 * This pipe is used to inform the worker thread that a command is queued and
103 * ready to be processed.
105 static int relay_conn_pipe
[2] = { -1, -1 };
107 /* Shared between threads */
108 static int dispatch_thread_exit
;
110 static pthread_t listener_thread
;
111 static pthread_t dispatcher_thread
;
112 static pthread_t worker_thread
;
113 static pthread_t health_thread
;
115 static uint64_t last_relay_stream_id
;
118 * Relay command queue.
120 * The relay_thread_listener and relay_thread_dispatcher communicate with this
123 static struct relay_conn_queue relay_conn_queue
;
125 /* buffer allocated at startup, used to store the trace data */
126 static char *data_buffer
;
127 static unsigned int data_buffer_size
;
129 /* We need those values for the file/dir creation. */
130 static uid_t relayd_uid
;
131 static gid_t relayd_gid
;
133 /* Global relay stream hash table. */
134 struct lttng_ht
*relay_streams_ht
;
136 /* Global relay viewer stream hash table. */
137 struct lttng_ht
*viewer_streams_ht
;
139 /* Global hash table that stores relay index object. */
140 struct lttng_ht
*indexes_ht
;
142 /* Relayd health monitoring */
143 struct health_app
*health_relayd
;
145 static struct option long_options
[] = {
146 { "control-port", 1, 0, 'C', },
147 { "data-port", 1, 0, 'D', },
148 { "live-port", 1, 0, 'L', },
149 { "daemonize", 0, 0, 'd', },
150 { "background", 0, 0, 'b', },
151 { "group", 1, 0, 'g', },
152 { "help", 0, 0, 'h', },
153 { "output", 1, 0, 'o', },
154 { "verbose", 0, 0, 'v', },
155 { "config", 1, 0, 'f' },
159 static const char *config_ignore_options
[] = { "help", "config" };
162 * usage function on stderr
167 fprintf(stderr
, "Usage: %s OPTIONS\n\nOptions:\n", progname
);
168 fprintf(stderr
, " -h, --help Display this usage.\n");
169 fprintf(stderr
, " -d, --daemonize Start as a daemon.\n");
170 fprintf(stderr
, " -b, --background Start as a daemon, keeping console open.\n");
171 fprintf(stderr
, " -C, --control-port URL Control port listening.\n");
172 fprintf(stderr
, " -D, --data-port URL Data port listening.\n");
173 fprintf(stderr
, " -L, --live-port URL Live view port listening.\n");
174 fprintf(stderr
, " -o, --output PATH Output path for traces. Must use an absolute path.\n");
175 fprintf(stderr
, " -v, --verbose Verbose mode. Activate DBG() macro.\n");
176 fprintf(stderr
, " -g, --group NAME Specify the tracing group name. (default: tracing)\n");
177 fprintf(stderr
, " -f --config Load daemon configuration file\n");
181 * Take an option from the getopt output and set it in the right variable to be
184 * Return 0 on success else a negative value.
187 int set_option(int opt
, const char *arg
, const char *optname
)
193 fprintf(stderr
, "option %s", optname
);
195 fprintf(stderr
, " with arg %s\n", arg
);
199 ret
= uri_parse(arg
, &control_uri
);
201 ERR("Invalid control URI specified");
204 if (control_uri
->port
== 0) {
205 control_uri
->port
= DEFAULT_NETWORK_CONTROL_PORT
;
209 ret
= uri_parse(arg
, &data_uri
);
211 ERR("Invalid data URI specified");
214 if (data_uri
->port
== 0) {
215 data_uri
->port
= DEFAULT_NETWORK_DATA_PORT
;
219 ret
= uri_parse(arg
, &live_uri
);
221 ERR("Invalid live URI specified");
224 if (live_uri
->port
== 0) {
225 live_uri
->port
= DEFAULT_NETWORK_VIEWER_PORT
;
235 tracing_group_name
= strdup(arg
);
236 if (tracing_group_name
== NULL
) {
241 tracing_group_name_override
= 1;
247 ret
= asprintf(&opt_output_path
, "%s", arg
);
250 PERROR("asprintf opt_output_path");
255 /* Verbose level can increase using multiple -v */
257 lttng_opt_verbose
= config_parse_value(arg
);
259 /* Only 3 level of verbosity (-vvv). */
260 if (lttng_opt_verbose
< 3) {
261 lttng_opt_verbose
+= 1;
266 /* Unknown option or other error.
267 * Error is printed by getopt, just return */
280 * config_entry_handler_cb used to handle options read from a config file.
281 * See config_entry_handler_cb comment in common/config/config.h for the
282 * return value conventions.
285 int config_entry_handler(const struct config_entry
*entry
, void *unused
)
289 if (!entry
|| !entry
->name
|| !entry
->value
) {
294 /* Check if the option is to be ignored */
295 for (i
= 0; i
< sizeof(config_ignore_options
) / sizeof(char *); i
++) {
296 if (!strcmp(entry
->name
, config_ignore_options
[i
])) {
301 for (i
= 0; i
< (sizeof(long_options
) / sizeof(struct option
)) - 1; i
++) {
302 /* Ignore if entry name is not fully matched. */
303 if (strcmp(entry
->name
, long_options
[i
].name
)) {
308 * If the option takes no argument on the command line, we have to
309 * check if the value is "true". We support non-zero numeric values,
312 if (!long_options
[i
].has_arg
) {
313 ret
= config_parse_value(entry
->value
);
316 WARN("Invalid configuration value \"%s\" for option %s",
317 entry
->value
, entry
->name
);
319 /* False, skip boolean config option. */
324 ret
= set_option(long_options
[i
].val
, entry
->value
, entry
->name
);
328 WARN("Unrecognized option \"%s\" in daemon configuration file.",
336 int set_options(int argc
, char **argv
)
338 int c
, ret
= 0, option_index
= 0, retval
= 0;
339 int orig_optopt
= optopt
, orig_optind
= optind
;
340 char *default_address
, *optstring
;
341 const char *config_path
= NULL
;
343 optstring
= utils_generate_optstring(long_options
,
344 sizeof(long_options
) / sizeof(struct option
));
350 /* Check for the --config option */
352 while ((c
= getopt_long(argc
, argv
, optstring
, long_options
,
353 &option_index
)) != -1) {
357 } else if (c
!= 'f') {
361 config_path
= utils_expand_path(optarg
);
363 ERR("Failed to resolve path: %s", optarg
);
367 ret
= config_get_section_entries(config_path
, config_section_name
,
368 config_entry_handler
, NULL
);
371 ERR("Invalid configuration option at line %i", ret
);
377 /* Reset getopt's global state */
378 optopt
= orig_optopt
;
379 optind
= orig_optind
;
381 c
= getopt_long(argc
, argv
, optstring
, long_options
, &option_index
);
386 ret
= set_option(c
, optarg
, long_options
[option_index
].name
);
393 /* assign default values */
394 if (control_uri
== NULL
) {
395 ret
= asprintf(&default_address
,
396 "tcp://" DEFAULT_NETWORK_CONTROL_BIND_ADDRESS
":%d",
397 DEFAULT_NETWORK_CONTROL_PORT
);
399 PERROR("asprintf default data address");
404 ret
= uri_parse(default_address
, &control_uri
);
405 free(default_address
);
407 ERR("Invalid control URI specified");
412 if (data_uri
== NULL
) {
413 ret
= asprintf(&default_address
,
414 "tcp://" DEFAULT_NETWORK_DATA_BIND_ADDRESS
":%d",
415 DEFAULT_NETWORK_DATA_PORT
);
417 PERROR("asprintf default data address");
422 ret
= uri_parse(default_address
, &data_uri
);
423 free(default_address
);
425 ERR("Invalid data URI specified");
430 if (live_uri
== NULL
) {
431 ret
= asprintf(&default_address
,
432 "tcp://" DEFAULT_NETWORK_VIEWER_BIND_ADDRESS
":%d",
433 DEFAULT_NETWORK_VIEWER_PORT
);
435 PERROR("asprintf default viewer control address");
440 ret
= uri_parse(default_address
, &live_uri
);
441 free(default_address
);
443 ERR("Invalid viewer control URI specified");
458 void relayd_cleanup(struct relay_local_data
*relay_ctx
)
462 if (viewer_streams_ht
)
463 lttng_ht_destroy(viewer_streams_ht
);
464 if (relay_streams_ht
)
465 lttng_ht_destroy(relay_streams_ht
);
466 if (relay_ctx
&& relay_ctx
->sessions_ht
)
467 lttng_ht_destroy(relay_ctx
->sessions_ht
);
470 /* free the dynamically allocated opt_output_path */
471 free(opt_output_path
);
473 /* Close thread quit pipes */
474 utils_close_pipe(thread_quit_pipe
);
476 uri_free(control_uri
);
478 /* Live URI is freed in the live thread. */
480 if (tracing_group_name_override
) {
481 free((void *) tracing_group_name
);
486 * Write to writable pipe used to notify a thread.
489 int notify_thread_pipe(int wpipe
)
493 ret
= lttng_write(wpipe
, "!", 1);
495 PERROR("write poll pipe");
504 int notify_health_quit_pipe(int *pipe
)
508 ret
= lttng_write(pipe
[1], "4", 1);
510 PERROR("write relay health quit");
519 * Stop all relayd and relayd-live threads.
521 int lttng_relay_stop_threads(void)
525 /* Stopping all threads */
526 DBG("Terminating all threads");
527 if (notify_thread_pipe(thread_quit_pipe
[1])) {
528 ERR("write error on thread quit pipe");
532 if (notify_health_quit_pipe(health_quit_pipe
)) {
533 ERR("write error on health quit pipe");
536 /* Dispatch thread */
537 CMM_STORE_SHARED(dispatch_thread_exit
, 1);
538 futex_nto1_wake(&relay_conn_queue
.futex
);
540 if (relayd_live_stop()) {
541 ERR("Error stopping live threads");
548 * Signal handler for the daemon
550 * Simply stop all worker threads, leaving main() return gracefully after
551 * joining all threads and calling cleanup().
554 void sighandler(int sig
)
558 DBG("SIGPIPE caught");
561 DBG("SIGINT caught");
562 if (lttng_relay_stop_threads()) {
563 ERR("Error stopping threads");
567 DBG("SIGTERM caught");
568 if (lttng_relay_stop_threads()) {
569 ERR("Error stopping threads");
573 CMM_STORE_SHARED(recv_child_signal
, 1);
581 * Setup signal handler for :
582 * SIGINT, SIGTERM, SIGPIPE
585 int set_signal_handler(void)
591 if ((ret
= sigemptyset(&sigset
)) < 0) {
592 PERROR("sigemptyset");
596 sa
.sa_handler
= sighandler
;
599 if ((ret
= sigaction(SIGTERM
, &sa
, NULL
)) < 0) {
604 if ((ret
= sigaction(SIGINT
, &sa
, NULL
)) < 0) {
609 if ((ret
= sigaction(SIGPIPE
, &sa
, NULL
)) < 0) {
614 if ((ret
= sigaction(SIGUSR1
, &sa
, NULL
)) < 0) {
619 DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT");
624 void lttng_relay_notify_ready(void)
626 /* Notify the parent of the fork() process that we are ready. */
627 if (opt_daemon
|| opt_background
) {
628 if (uatomic_sub_return(<tng_relay_ready
, 1) == 0) {
629 kill(child_ppid
, SIGUSR1
);
635 * Init thread quit pipe.
637 * Return -1 on error or 0 if all pipes are created.
640 int init_thread_quit_pipe(void)
644 ret
= utils_create_pipe_cloexec(thread_quit_pipe
);
650 * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set.
653 int create_thread_poll_set(struct lttng_poll_event
*events
, int size
)
657 if (events
== NULL
|| size
== 0) {
662 ret
= lttng_poll_create(events
, size
, LTTNG_CLOEXEC
);
668 ret
= lttng_poll_add(events
, thread_quit_pipe
[0], LPOLLIN
| LPOLLERR
);
680 * Check if the thread quit pipe was triggered.
682 * Return 1 if it was triggered else 0;
685 int check_thread_quit_pipe(int fd
, uint32_t events
)
687 if (fd
== thread_quit_pipe
[0] && (events
& LPOLLIN
)) {
695 * Create and init socket from uri.
698 struct lttcomm_sock
*relay_init_sock(struct lttng_uri
*uri
)
701 struct lttcomm_sock
*sock
= NULL
;
703 sock
= lttcomm_alloc_sock_from_uri(uri
);
705 ERR("Allocating socket");
709 ret
= lttcomm_create_sock(sock
);
713 DBG("Listening on sock %d", sock
->fd
);
715 ret
= sock
->ops
->bind(sock
);
720 ret
= sock
->ops
->listen(sock
, -1);
730 lttcomm_destroy_sock(sock
);
736 * Return nonzero if stream needs to be closed.
739 int close_stream_check(struct relay_stream
*stream
)
741 if (stream
->close_flag
&& stream
->prev_seq
== stream
->last_net_seq_num
) {
743 * We are about to close the stream so set the data pending flag to 1
744 * which will make the end data pending command skip the stream which
745 * is now closed and ready. Note that after proceeding to a file close,
746 * the written file is ready for reading.
748 stream
->data_pending_check_done
= 1;
754 static void try_close_stream(struct relay_session
*session
,
755 struct relay_stream
*stream
)
758 struct ctf_trace
*ctf_trace
;
763 if (!close_stream_check(stream
)) {
764 /* Can't close it, not ready for that. */
768 ctf_trace
= ctf_trace_find_by_path(session
->ctf_traces_ht
,
772 pthread_mutex_lock(&session
->viewer_ready_lock
);
773 ctf_trace
->invalid_flag
= 1;
774 pthread_mutex_unlock(&session
->viewer_ready_lock
);
776 ret
= stream_close(session
, stream
);
777 if (ret
|| session
->snapshot
) {
778 /* Already close thus the ctf trace is being or has been destroyed. */
782 ctf_trace_try_destroy(session
, ctf_trace
);
789 * This thread manages the listening for new connections on the network
792 void *relay_thread_listener(void *data
)
794 int i
, ret
, pollfd
, err
= -1;
795 uint32_t revents
, nb_fd
;
796 struct lttng_poll_event events
;
797 struct lttcomm_sock
*control_sock
, *data_sock
;
799 DBG("[thread] Relay listener started");
801 health_register(health_relayd
, HEALTH_RELAYD_TYPE_LISTENER
);
803 health_code_update();
805 control_sock
= relay_init_sock(control_uri
);
807 goto error_sock_control
;
810 data_sock
= relay_init_sock(data_uri
);
812 goto error_sock_relay
;
816 * Pass 3 as size here for the thread quit pipe, control and data socket.
818 ret
= create_thread_poll_set(&events
, 3);
820 goto error_create_poll
;
823 /* Add the control socket */
824 ret
= lttng_poll_add(&events
, control_sock
->fd
, LPOLLIN
| LPOLLRDHUP
);
829 /* Add the data socket */
830 ret
= lttng_poll_add(&events
, data_sock
->fd
, LPOLLIN
| LPOLLRDHUP
);
835 lttng_relay_notify_ready();
837 if (testpoint(relayd_thread_listener
)) {
838 goto error_testpoint
;
842 health_code_update();
844 DBG("Listener accepting connections");
848 ret
= lttng_poll_wait(&events
, -1);
852 * Restart interrupted system call.
854 if (errno
== EINTR
) {
862 DBG("Relay new connection received");
863 for (i
= 0; i
< nb_fd
; i
++) {
864 health_code_update();
866 /* Fetch once the poll data */
867 revents
= LTTNG_POLL_GETEV(&events
, i
);
868 pollfd
= LTTNG_POLL_GETFD(&events
, i
);
871 /* No activity for this FD (poll implementation). */
875 /* Thread quit pipe has been closed. Killing thread. */
876 ret
= check_thread_quit_pipe(pollfd
, revents
);
882 if (revents
& (LPOLLERR
| LPOLLHUP
| LPOLLRDHUP
)) {
883 ERR("socket poll error");
885 } else if (revents
& LPOLLIN
) {
887 * Get allocated in this thread, enqueued to a global queue,
888 * dequeued and freed in the worker thread.
891 struct relay_connection
*new_conn
;
892 struct lttcomm_sock
*newsock
;
894 new_conn
= connection_create();
899 if (pollfd
== data_sock
->fd
) {
900 new_conn
->type
= RELAY_DATA
;
901 newsock
= data_sock
->ops
->accept(data_sock
);
902 DBG("Relay data connection accepted, socket %d",
905 assert(pollfd
== control_sock
->fd
);
906 new_conn
->type
= RELAY_CONTROL
;
907 newsock
= control_sock
->ops
->accept(control_sock
);
908 DBG("Relay control connection accepted, socket %d",
912 PERROR("accepting sock");
913 connection_free(new_conn
);
917 ret
= setsockopt(newsock
->fd
, SOL_SOCKET
, SO_REUSEADDR
, &val
,
920 PERROR("setsockopt inet");
921 lttcomm_destroy_sock(newsock
);
922 connection_free(new_conn
);
925 new_conn
->sock
= newsock
;
927 /* Enqueue request for the dispatcher thread. */
928 cds_wfcq_enqueue(&relay_conn_queue
.head
, &relay_conn_queue
.tail
,
932 * Wake the dispatch queue futex. Implicit memory barrier with
933 * the exchange in cds_wfcq_enqueue.
935 futex_nto1_wake(&relay_conn_queue
.futex
);
944 lttng_poll_clean(&events
);
946 if (data_sock
->fd
>= 0) {
947 ret
= data_sock
->ops
->close(data_sock
);
952 lttcomm_destroy_sock(data_sock
);
954 if (control_sock
->fd
>= 0) {
955 ret
= control_sock
->ops
->close(control_sock
);
960 lttcomm_destroy_sock(control_sock
);
964 ERR("Health error occurred in %s", __func__
);
966 health_unregister(health_relayd
);
967 DBG("Relay listener thread cleanup complete");
968 lttng_relay_stop_threads();
973 * This thread manages the dispatching of the requests to worker threads
976 void *relay_thread_dispatcher(void *data
)
980 struct cds_wfcq_node
*node
;
981 struct relay_connection
*new_conn
= NULL
;
983 DBG("[thread] Relay dispatcher started");
985 health_register(health_relayd
, HEALTH_RELAYD_TYPE_DISPATCHER
);
987 if (testpoint(relayd_thread_dispatcher
)) {
988 goto error_testpoint
;
991 health_code_update();
993 while (!CMM_LOAD_SHARED(dispatch_thread_exit
)) {
994 health_code_update();
996 /* Atomically prepare the queue futex */
997 futex_nto1_prepare(&relay_conn_queue
.futex
);
1000 health_code_update();
1002 /* Dequeue commands */
1003 node
= cds_wfcq_dequeue_blocking(&relay_conn_queue
.head
,
1004 &relay_conn_queue
.tail
);
1006 DBG("Woken up but nothing in the relay command queue");
1007 /* Continue thread execution */
1010 new_conn
= caa_container_of(node
, struct relay_connection
, qnode
);
1012 DBG("Dispatching request waiting on sock %d", new_conn
->sock
->fd
);
1015 * Inform worker thread of the new request. This call is blocking
1016 * so we can be assured that the data will be read at some point in
1017 * time or wait to the end of the world :)
1019 ret
= lttng_write(relay_conn_pipe
[1], &new_conn
, sizeof(new_conn
));
1021 PERROR("write connection pipe");
1022 connection_destroy(new_conn
);
1025 } while (node
!= NULL
);
1027 /* Futex wait on queue. Blocking call on futex() */
1028 health_poll_entry();
1029 futex_nto1_wait(&relay_conn_queue
.futex
);
1033 /* Normal exit, no error */
1040 ERR("Health error occurred in %s", __func__
);
1042 health_unregister(health_relayd
);
1043 DBG("Dispatch thread dying");
1044 lttng_relay_stop_threads();
1048 static void try_close_streams(struct relay_session
*session
)
1050 struct ctf_trace
*ctf_trace
;
1051 struct lttng_ht_iter iter
;
1055 pthread_mutex_lock(&session
->viewer_ready_lock
);
1057 cds_lfht_for_each_entry(session
->ctf_traces_ht
->ht
, &iter
.iter
, ctf_trace
,
1059 struct relay_stream
*stream
;
1061 /* Close streams. */
1062 cds_list_for_each_entry(stream
, &ctf_trace
->stream_list
, trace_list
) {
1063 stream_close(session
, stream
);
1066 ctf_trace
->invalid_flag
= 1;
1067 ctf_trace_try_destroy(session
, ctf_trace
);
1070 pthread_mutex_unlock(&session
->viewer_ready_lock
);
1074 * Try to destroy a session within a connection.
1076 static void destroy_session(struct relay_session
*session
,
1077 struct lttng_ht
*sessions_ht
)
1080 assert(sessions_ht
);
1082 /* Indicate that this session can be destroyed from now on. */
1083 session
->close_flag
= 1;
1085 try_close_streams(session
);
1088 * This will try to delete and destroy the session if no viewer is attached
1089 * to it meaning the refcount is down to zero.
1091 session_try_destroy(sessions_ht
, session
);
1095 * Copy index data from the control port to a given index object.
1097 static void copy_index_control_data(struct relay_index
*index
,
1098 struct lttcomm_relayd_index
*data
)
1104 * The index on disk is encoded in big endian, so we don't need to convert
1105 * the data received on the network. The data_offset value is NEVER
1106 * modified here and is updated by the data thread.
1108 index
->index_data
.packet_size
= data
->packet_size
;
1109 index
->index_data
.content_size
= data
->content_size
;
1110 index
->index_data
.timestamp_begin
= data
->timestamp_begin
;
1111 index
->index_data
.timestamp_end
= data
->timestamp_end
;
1112 index
->index_data
.events_discarded
= data
->events_discarded
;
1113 index
->index_data
.stream_id
= data
->stream_id
;
1117 * Handle the RELAYD_CREATE_SESSION command.
1119 * On success, send back the session id or else return a negative value.
1122 int relay_create_session(struct lttcomm_relayd_hdr
*recv_hdr
,
1123 struct relay_connection
*conn
)
1125 int ret
= 0, send_ret
;
1126 struct relay_session
*session
;
1127 struct lttcomm_relayd_status_session reply
;
1132 memset(&reply
, 0, sizeof(reply
));
1134 session
= session_create();
1139 session
->minor
= conn
->minor
;
1140 session
->major
= conn
->major
;
1141 conn
->session_id
= session
->id
;
1142 conn
->session
= session
;
1144 reply
.session_id
= htobe64(session
->id
);
1146 switch (conn
->minor
) {
1151 case 4: /* LTTng sessiond 2.4 */
1153 ret
= cmd_create_session_2_4(conn
, session
);
1156 lttng_ht_add_unique_u64(conn
->sessions_ht
, &session
->session_n
);
1157 DBG("Created session %" PRIu64
, session
->id
);
1161 reply
.ret_code
= htobe32(LTTNG_ERR_FATAL
);
1163 reply
.ret_code
= htobe32(LTTNG_OK
);
1166 send_ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
1168 ERR("Relayd sending session id");
1176 * When we have received all the streams and the metadata for a channel,
1177 * we make them visible to the viewer threads.
1180 void set_viewer_ready_flag(struct relay_connection
*conn
)
1182 struct relay_stream
*stream
, *tmp_stream
;
1184 pthread_mutex_lock(&conn
->session
->viewer_ready_lock
);
1185 cds_list_for_each_entry_safe(stream
, tmp_stream
, &conn
->recv_head
,
1187 stream
->viewer_ready
= 1;
1188 cds_list_del(&stream
->recv_list
);
1190 pthread_mutex_unlock(&conn
->session
->viewer_ready_lock
);
1195 * Add a recv handle node to the connection recv list with the given stream
1196 * handle. A new node is allocated thus must be freed when the node is deleted
1199 static void queue_stream(struct relay_stream
*stream
,
1200 struct relay_connection
*conn
)
1205 cds_list_add(&stream
->recv_list
, &conn
->recv_head
);
1209 * relay_add_stream: allocate a new stream for a session
1212 int relay_add_stream(struct lttcomm_relayd_hdr
*recv_hdr
,
1213 struct relay_connection
*conn
)
1216 struct relay_session
*session
= conn
->session
;
1217 struct relay_stream
*stream
= NULL
;
1218 struct lttcomm_relayd_status_stream reply
;
1219 struct ctf_trace
*trace
;
1221 if (!session
|| conn
->version_check_done
== 0) {
1222 ERR("Trying to add a stream before version check");
1224 goto end_no_session
;
1227 stream
= zmalloc(sizeof(struct relay_stream
));
1228 if (stream
== NULL
) {
1229 PERROR("relay stream zmalloc");
1231 goto end_no_session
;
1234 switch (conn
->minor
) {
1235 case 1: /* LTTng sessiond 2.1 */
1236 ret
= cmd_recv_stream_2_1(conn
, stream
);
1238 case 2: /* LTTng sessiond 2.2 */
1240 ret
= cmd_recv_stream_2_2(conn
, stream
);
1244 goto err_free_stream
;
1248 stream
->stream_handle
= ++last_relay_stream_id
;
1249 stream
->prev_seq
= -1ULL;
1250 stream
->session_id
= session
->id
;
1251 stream
->index_fd
= -1;
1252 stream
->read_index_fd
= -1;
1253 stream
->ctf_stream_id
= -1ULL;
1254 lttng_ht_node_init_u64(&stream
->node
, stream
->stream_handle
);
1255 pthread_mutex_init(&stream
->lock
, NULL
);
1257 ret
= utils_mkdir_recursive(stream
->path_name
, S_IRWXU
| S_IRWXG
,
1260 ERR("relay creating output directory");
1261 goto err_free_stream
;
1265 * No need to use run_as API here because whatever we receives, the relayd
1266 * uses its own credentials for the stream files.
1268 ret
= utils_create_stream_file(stream
->path_name
, stream
->channel_name
,
1269 stream
->tracefile_size
, 0, relayd_uid
, relayd_gid
, NULL
);
1271 ERR("Create output file");
1272 goto err_free_stream
;
1275 if (stream
->tracefile_size
) {
1276 DBG("Tracefile %s/%s_0 created", stream
->path_name
, stream
->channel_name
);
1278 DBG("Tracefile %s/%s created", stream
->path_name
, stream
->channel_name
);
1281 trace
= ctf_trace_find_by_path(session
->ctf_traces_ht
, stream
->path_name
);
1283 trace
= ctf_trace_create(stream
->path_name
);
1288 ctf_trace_add(session
->ctf_traces_ht
, trace
);
1290 ctf_trace_get_ref(trace
);
1292 if (!strncmp(stream
->channel_name
, DEFAULT_METADATA_NAME
, NAME_MAX
)) {
1293 stream
->metadata_flag
= 1;
1294 /* Assign quick reference to the metadata stream in the trace. */
1295 trace
->metadata_stream
= stream
;
1299 * Add the stream in the recv list of the connection. Once the end stream
1300 * message is received, this list is emptied and streams are set with the
1301 * viewer ready flag.
1303 queue_stream(stream
, conn
);
1306 * Both in the ctf_trace object and the global stream ht since the data
1307 * side of the relayd does not have the concept of session.
1309 lttng_ht_add_unique_u64(relay_streams_ht
, &stream
->node
);
1310 cds_list_add_tail(&stream
->trace_list
, &trace
->stream_list
);
1312 session
->stream_count
++;
1314 DBG("Relay new stream added %s with ID %" PRIu64
, stream
->channel_name
,
1315 stream
->stream_handle
);
1318 memset(&reply
, 0, sizeof(reply
));
1319 reply
.handle
= htobe64(stream
->stream_handle
);
1320 /* send the session id to the client or a negative return code on error */
1322 reply
.ret_code
= htobe32(LTTNG_ERR_UNK
);
1323 /* stream was not properly added to the ht, so free it */
1324 stream_destroy(stream
);
1326 reply
.ret_code
= htobe32(LTTNG_OK
);
1329 send_ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
,
1330 sizeof(struct lttcomm_relayd_status_stream
), 0);
1332 ERR("Relay sending stream id");
1341 stream_destroy(stream
);
1346 * relay_close_stream: close a specific stream
1349 int relay_close_stream(struct lttcomm_relayd_hdr
*recv_hdr
,
1350 struct relay_connection
*conn
)
1353 struct relay_session
*session
= conn
->session
;
1354 struct lttcomm_relayd_close_stream stream_info
;
1355 struct lttcomm_relayd_generic_reply reply
;
1356 struct relay_stream
*stream
;
1358 DBG("Close stream received");
1360 if (!session
|| conn
->version_check_done
== 0) {
1361 ERR("Trying to close a stream before version check");
1363 goto end_no_session
;
1366 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &stream_info
,
1367 sizeof(struct lttcomm_relayd_close_stream
), 0);
1368 if (ret
< sizeof(struct lttcomm_relayd_close_stream
)) {
1370 /* Orderly shutdown. Not necessary to print an error. */
1371 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1373 ERR("Relay didn't receive valid add_stream struct size : %d", ret
);
1376 goto end_no_session
;
1380 stream
= stream_find_by_id(relay_streams_ht
,
1381 be64toh(stream_info
.stream_id
));
1387 stream
->last_net_seq_num
= be64toh(stream_info
.last_net_seq_num
);
1388 stream
->close_flag
= 1;
1389 session
->stream_count
--;
1391 /* Check if we can close it or else the data will do it. */
1392 try_close_stream(session
, stream
);
1397 memset(&reply
, 0, sizeof(reply
));
1399 reply
.ret_code
= htobe32(LTTNG_ERR_UNK
);
1401 reply
.ret_code
= htobe32(LTTNG_OK
);
1403 send_ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
,
1404 sizeof(struct lttcomm_relayd_generic_reply
), 0);
1406 ERR("Relay sending stream id");
1415 * relay_unknown_command: send -1 if received unknown command
1418 void relay_unknown_command(struct relay_connection
*conn
)
1420 struct lttcomm_relayd_generic_reply reply
;
1423 memset(&reply
, 0, sizeof(reply
));
1424 reply
.ret_code
= htobe32(LTTNG_ERR_UNK
);
1425 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
,
1426 sizeof(struct lttcomm_relayd_generic_reply
), 0);
1428 ERR("Relay sending unknown command");
1433 * relay_start: send an acknowledgment to the client to tell if we are
1434 * ready to receive data. We are ready if a session is established.
1437 int relay_start(struct lttcomm_relayd_hdr
*recv_hdr
,
1438 struct relay_connection
*conn
)
1440 int ret
= htobe32(LTTNG_OK
);
1441 struct lttcomm_relayd_generic_reply reply
;
1442 struct relay_session
*session
= conn
->session
;
1445 DBG("Trying to start the streaming without a session established");
1446 ret
= htobe32(LTTNG_ERR_UNK
);
1449 memset(&reply
, 0, sizeof(reply
));
1450 reply
.ret_code
= ret
;
1451 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
,
1452 sizeof(struct lttcomm_relayd_generic_reply
), 0);
1454 ERR("Relay sending start ack");
1461 * Append padding to the file pointed by the file descriptor fd.
1463 static int write_padding_to_file(int fd
, uint32_t size
)
1472 zeros
= zmalloc(size
);
1473 if (zeros
== NULL
) {
1474 PERROR("zmalloc zeros for padding");
1479 ret
= lttng_write(fd
, zeros
, size
);
1481 PERROR("write padding to file");
1491 * relay_recv_metadata: receive the metada for the session.
1494 int relay_recv_metadata(struct lttcomm_relayd_hdr
*recv_hdr
,
1495 struct relay_connection
*conn
)
1497 int ret
= htobe32(LTTNG_OK
);
1499 struct relay_session
*session
= conn
->session
;
1500 struct lttcomm_relayd_metadata_payload
*metadata_struct
;
1501 struct relay_stream
*metadata_stream
;
1502 uint64_t data_size
, payload_size
;
1503 struct ctf_trace
*ctf_trace
;
1506 ERR("Metadata sent before version check");
1511 data_size
= payload_size
= be64toh(recv_hdr
->data_size
);
1512 if (data_size
< sizeof(struct lttcomm_relayd_metadata_payload
)) {
1513 ERR("Incorrect data size");
1517 payload_size
-= sizeof(struct lttcomm_relayd_metadata_payload
);
1519 if (data_buffer_size
< data_size
) {
1520 /* In case the realloc fails, we can free the memory */
1523 tmp_data_ptr
= realloc(data_buffer
, data_size
);
1524 if (!tmp_data_ptr
) {
1525 ERR("Allocating data buffer");
1530 data_buffer
= tmp_data_ptr
;
1531 data_buffer_size
= data_size
;
1533 memset(data_buffer
, 0, data_size
);
1534 DBG2("Relay receiving metadata, waiting for %" PRIu64
" bytes", data_size
);
1535 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, data_buffer
, data_size
, 0);
1536 if (ret
< 0 || ret
!= data_size
) {
1538 /* Orderly shutdown. Not necessary to print an error. */
1539 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1541 ERR("Relay didn't receive the whole metadata");
1546 metadata_struct
= (struct lttcomm_relayd_metadata_payload
*) data_buffer
;
1549 metadata_stream
= stream_find_by_id(relay_streams_ht
,
1550 be64toh(metadata_struct
->stream_id
));
1551 if (!metadata_stream
) {
1556 size_ret
= lttng_write(metadata_stream
->fd
, metadata_struct
->payload
,
1558 if (size_ret
< payload_size
) {
1559 ERR("Relay error writing metadata on file");
1564 ret
= write_padding_to_file(metadata_stream
->fd
,
1565 be32toh(metadata_struct
->padding_size
));
1570 ctf_trace
= ctf_trace_find_by_path(session
->ctf_traces_ht
,
1571 metadata_stream
->path_name
);
1573 ctf_trace
->metadata_received
+=
1574 payload_size
+ be32toh(metadata_struct
->padding_size
);
1576 DBG2("Relay metadata written");
1585 * relay_send_version: send relayd version number
1588 int relay_send_version(struct lttcomm_relayd_hdr
*recv_hdr
,
1589 struct relay_connection
*conn
)
1592 struct lttcomm_relayd_version reply
, msg
;
1596 conn
->version_check_done
= 1;
1598 /* Get version from the other side. */
1599 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &msg
, sizeof(msg
), 0);
1600 if (ret
< 0 || ret
!= sizeof(msg
)) {
1602 /* Orderly shutdown. Not necessary to print an error. */
1603 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1605 ERR("Relay failed to receive the version values.");
1611 memset(&reply
, 0, sizeof(reply
));
1612 reply
.major
= RELAYD_VERSION_COMM_MAJOR
;
1613 reply
.minor
= RELAYD_VERSION_COMM_MINOR
;
1615 /* Major versions must be the same */
1616 if (reply
.major
!= be32toh(msg
.major
)) {
1617 DBG("Incompatible major versions (%u vs %u), deleting session",
1618 reply
.major
, be32toh(msg
.major
));
1619 destroy_session(conn
->session
, conn
->sessions_ht
);
1624 conn
->major
= reply
.major
;
1625 /* We adapt to the lowest compatible version */
1626 if (reply
.minor
<= be32toh(msg
.minor
)) {
1627 conn
->minor
= reply
.minor
;
1629 conn
->minor
= be32toh(msg
.minor
);
1632 reply
.major
= htobe32(reply
.major
);
1633 reply
.minor
= htobe32(reply
.minor
);
1634 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
,
1635 sizeof(struct lttcomm_relayd_version
), 0);
1637 ERR("Relay sending version");
1640 DBG("Version check done using protocol %u.%u", conn
->major
,
1648 * Check for data pending for a given stream id from the session daemon.
1651 int relay_data_pending(struct lttcomm_relayd_hdr
*recv_hdr
,
1652 struct relay_connection
*conn
)
1654 struct relay_session
*session
= conn
->session
;
1655 struct lttcomm_relayd_data_pending msg
;
1656 struct lttcomm_relayd_generic_reply reply
;
1657 struct relay_stream
*stream
;
1659 uint64_t last_net_seq_num
, stream_id
;
1661 DBG("Data pending command received");
1663 if (!session
|| conn
->version_check_done
== 0) {
1664 ERR("Trying to check for data before version check");
1666 goto end_no_session
;
1669 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &msg
, sizeof(msg
), 0);
1670 if (ret
< sizeof(msg
)) {
1672 /* Orderly shutdown. Not necessary to print an error. */
1673 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1675 ERR("Relay didn't receive valid data_pending struct size : %d",
1679 goto end_no_session
;
1682 stream_id
= be64toh(msg
.stream_id
);
1683 last_net_seq_num
= be64toh(msg
.last_net_seq_num
);
1686 stream
= stream_find_by_id(relay_streams_ht
, stream_id
);
1687 if (stream
== NULL
) {
1692 DBG("Data pending for stream id %" PRIu64
" prev_seq %" PRIu64
1693 " and last_seq %" PRIu64
, stream_id
, stream
->prev_seq
,
1696 /* Avoid wrapping issue */
1697 if (((int64_t) (stream
->prev_seq
- last_net_seq_num
)) >= 0) {
1698 /* Data has in fact been written and is NOT pending */
1701 /* Data still being streamed thus pending */
1705 /* Pending check is now done. */
1706 stream
->data_pending_check_done
= 1;
1711 memset(&reply
, 0, sizeof(reply
));
1712 reply
.ret_code
= htobe32(ret
);
1713 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
1715 ERR("Relay data pending ret code failed");
1723 * Wait for the control socket to reach a quiescent state.
1725 * Note that for now, when receiving this command from the session daemon, this
1726 * means that every subsequent commands or data received on the control socket
1727 * has been handled. So, this is why we simply return OK here.
1730 int relay_quiescent_control(struct lttcomm_relayd_hdr
*recv_hdr
,
1731 struct relay_connection
*conn
)
1735 struct relay_stream
*stream
;
1736 struct lttng_ht_iter iter
;
1737 struct lttcomm_relayd_quiescent_control msg
;
1738 struct lttcomm_relayd_generic_reply reply
;
1740 DBG("Checking quiescent state on control socket");
1742 if (!conn
->session
|| conn
->version_check_done
== 0) {
1743 ERR("Trying to check for data before version check");
1745 goto end_no_session
;
1748 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &msg
, sizeof(msg
), 0);
1749 if (ret
< sizeof(msg
)) {
1751 /* Orderly shutdown. Not necessary to print an error. */
1752 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1754 ERR("Relay didn't receive valid begin data_pending struct size: %d",
1758 goto end_no_session
;
1761 stream_id
= be64toh(msg
.stream_id
);
1764 cds_lfht_for_each_entry(relay_streams_ht
->ht
, &iter
.iter
, stream
,
1766 if (stream
->stream_handle
== stream_id
) {
1767 stream
->data_pending_check_done
= 1;
1768 DBG("Relay quiescent control pending flag set to %" PRIu64
,
1775 memset(&reply
, 0, sizeof(reply
));
1776 reply
.ret_code
= htobe32(LTTNG_OK
);
1777 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
1779 ERR("Relay data quiescent control ret code failed");
1787 * Initialize a data pending command. This means that a client is about to ask
1788 * for data pending for each stream he/she holds. Simply iterate over all
1789 * streams of a session and set the data_pending_check_done flag.
1791 * This command returns to the client a LTTNG_OK code.
1794 int relay_begin_data_pending(struct lttcomm_relayd_hdr
*recv_hdr
,
1795 struct relay_connection
*conn
)
1798 struct lttng_ht_iter iter
;
1799 struct lttcomm_relayd_begin_data_pending msg
;
1800 struct lttcomm_relayd_generic_reply reply
;
1801 struct relay_stream
*stream
;
1802 uint64_t session_id
;
1807 DBG("Init streams for data pending");
1809 if (!conn
->session
|| conn
->version_check_done
== 0) {
1810 ERR("Trying to check for data before version check");
1812 goto end_no_session
;
1815 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &msg
, sizeof(msg
), 0);
1816 if (ret
< sizeof(msg
)) {
1818 /* Orderly shutdown. Not necessary to print an error. */
1819 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1821 ERR("Relay didn't receive valid begin data_pending struct size: %d",
1825 goto end_no_session
;
1828 session_id
= be64toh(msg
.session_id
);
1831 * Iterate over all streams to set the begin data pending flag. For now, the
1832 * streams are indexed by stream handle so we have to iterate over all
1833 * streams to find the one associated with the right session_id.
1836 cds_lfht_for_each_entry(relay_streams_ht
->ht
, &iter
.iter
, stream
,
1838 if (stream
->session_id
== session_id
) {
1839 stream
->data_pending_check_done
= 0;
1840 DBG("Set begin data pending flag to stream %" PRIu64
,
1841 stream
->stream_handle
);
1846 memset(&reply
, 0, sizeof(reply
));
1847 /* All good, send back reply. */
1848 reply
.ret_code
= htobe32(LTTNG_OK
);
1850 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
1852 ERR("Relay begin data pending send reply failed");
1860 * End data pending command. This will check, for a given session id, if each
1861 * stream associated with it has its data_pending_check_done flag set. If not,
1862 * this means that the client lost track of the stream but the data is still
1863 * being streamed on our side. In this case, we inform the client that data is
1866 * Return to the client if there is data in flight or not with a ret_code.
1869 int relay_end_data_pending(struct lttcomm_relayd_hdr
*recv_hdr
,
1870 struct relay_connection
*conn
)
1873 struct lttng_ht_iter iter
;
1874 struct lttcomm_relayd_end_data_pending msg
;
1875 struct lttcomm_relayd_generic_reply reply
;
1876 struct relay_stream
*stream
;
1877 uint64_t session_id
;
1878 uint32_t is_data_inflight
= 0;
1883 DBG("End data pending command");
1885 if (!conn
->session
|| conn
->version_check_done
== 0) {
1886 ERR("Trying to check for data before version check");
1888 goto end_no_session
;
1891 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &msg
, sizeof(msg
), 0);
1892 if (ret
< sizeof(msg
)) {
1894 /* Orderly shutdown. Not necessary to print an error. */
1895 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1897 ERR("Relay didn't receive valid end data_pending struct size: %d",
1901 goto end_no_session
;
1904 session_id
= be64toh(msg
.session_id
);
1906 /* Iterate over all streams to see if the begin data pending flag is set. */
1908 cds_lfht_for_each_entry(relay_streams_ht
->ht
, &iter
.iter
, stream
,
1910 if (stream
->session_id
== session_id
&&
1911 !stream
->data_pending_check_done
&& !stream
->terminated_flag
) {
1912 is_data_inflight
= 1;
1913 DBG("Data is still in flight for stream %" PRIu64
,
1914 stream
->stream_handle
);
1920 memset(&reply
, 0, sizeof(reply
));
1921 /* All good, send back reply. */
1922 reply
.ret_code
= htobe32(is_data_inflight
);
1924 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
1926 ERR("Relay end data pending send reply failed");
1934 * Receive an index for a specific stream.
1936 * Return 0 on success else a negative value.
1939 int relay_recv_index(struct lttcomm_relayd_hdr
*recv_hdr
,
1940 struct relay_connection
*conn
)
1942 int ret
, send_ret
, index_created
= 0;
1943 struct relay_session
*session
= conn
->session
;
1944 struct lttcomm_relayd_index index_info
;
1945 struct relay_index
*index
, *wr_index
= NULL
;
1946 struct lttcomm_relayd_generic_reply reply
;
1947 struct relay_stream
*stream
;
1948 uint64_t net_seq_num
;
1952 DBG("Relay receiving index");
1954 if (!session
|| conn
->version_check_done
== 0) {
1955 ERR("Trying to close a stream before version check");
1957 goto end_no_session
;
1960 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &index_info
,
1961 sizeof(index_info
), 0);
1962 if (ret
< sizeof(index_info
)) {
1964 /* Orderly shutdown. Not necessary to print an error. */
1965 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1967 ERR("Relay didn't receive valid index struct size : %d", ret
);
1970 goto end_no_session
;
1973 net_seq_num
= be64toh(index_info
.net_seq_num
);
1976 stream
= stream_find_by_id(relay_streams_ht
,
1977 be64toh(index_info
.relay_stream_id
));
1980 goto end_rcu_unlock
;
1983 /* Live beacon handling */
1984 if (index_info
.packet_size
== 0) {
1985 DBG("Received live beacon for stream %" PRIu64
, stream
->stream_handle
);
1988 * Only flag a stream inactive when it has already received data
1989 * and no indexes are in flight.
1991 if (stream
->total_index_received
> 0 && stream
->indexes_in_flight
== 0) {
1992 stream
->beacon_ts_end
= be64toh(index_info
.timestamp_end
);
1995 goto end_rcu_unlock
;
1997 stream
->beacon_ts_end
= -1ULL;
2000 index
= relay_index_find(stream
->stream_handle
, net_seq_num
);
2002 /* A successful creation will add the object to the HT. */
2003 index
= relay_index_create(stream
->stream_handle
, net_seq_num
);
2005 goto end_rcu_unlock
;
2008 stream
->indexes_in_flight
++;
2011 copy_index_control_data(index
, &index_info
);
2012 if (stream
->ctf_stream_id
== -1ULL) {
2013 stream
->ctf_stream_id
= be64toh(index_info
.stream_id
);
2016 if (index_created
) {
2018 * Try to add the relay index object to the hash table. If an object
2019 * already exist, destroy back the index created, set the data in this
2020 * object and write it on disk.
2022 relay_index_add(index
, &wr_index
);
2024 copy_index_control_data(wr_index
, &index_info
);
2028 /* The index already exists so write it on disk. */
2032 /* Do we have a writable ready index to write on disk. */
2034 ret
= relay_index_write(wr_index
->fd
, wr_index
);
2036 goto end_rcu_unlock
;
2038 stream
->total_index_received
++;
2039 stream
->indexes_in_flight
--;
2040 assert(stream
->indexes_in_flight
>= 0);
2046 memset(&reply
, 0, sizeof(reply
));
2048 reply
.ret_code
= htobe32(LTTNG_ERR_UNK
);
2050 reply
.ret_code
= htobe32(LTTNG_OK
);
2052 send_ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
2054 ERR("Relay sending close index id reply");
2063 * Receive the streams_sent message.
2065 * Return 0 on success else a negative value.
2068 int relay_streams_sent(struct lttcomm_relayd_hdr
*recv_hdr
,
2069 struct relay_connection
*conn
)
2072 struct lttcomm_relayd_generic_reply reply
;
2076 DBG("Relay receiving streams_sent");
2078 if (!conn
->session
|| conn
->version_check_done
== 0) {
2079 ERR("Trying to close a stream before version check");
2081 goto end_no_session
;
2085 * Flag every pending stream in the connection recv list that they are
2086 * ready to be used by the viewer.
2088 set_viewer_ready_flag(conn
);
2091 * Inform the viewer that there are new streams in the session.
2093 if (conn
->session
->viewer_refcount
) {
2094 uatomic_set(&conn
->session
->new_streams
, 1);
2097 memset(&reply
, 0, sizeof(reply
));
2098 reply
.ret_code
= htobe32(LTTNG_OK
);
2099 send_ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
2101 ERR("Relay sending sent_stream reply");
2113 * Process the commands received on the control socket
2116 int relay_process_control(struct lttcomm_relayd_hdr
*recv_hdr
,
2117 struct relay_connection
*conn
)
2121 switch (be32toh(recv_hdr
->cmd
)) {
2122 case RELAYD_CREATE_SESSION
:
2123 ret
= relay_create_session(recv_hdr
, conn
);
2125 case RELAYD_ADD_STREAM
:
2126 ret
= relay_add_stream(recv_hdr
, conn
);
2128 case RELAYD_START_DATA
:
2129 ret
= relay_start(recv_hdr
, conn
);
2131 case RELAYD_SEND_METADATA
:
2132 ret
= relay_recv_metadata(recv_hdr
, conn
);
2134 case RELAYD_VERSION
:
2135 ret
= relay_send_version(recv_hdr
, conn
);
2137 case RELAYD_CLOSE_STREAM
:
2138 ret
= relay_close_stream(recv_hdr
, conn
);
2140 case RELAYD_DATA_PENDING
:
2141 ret
= relay_data_pending(recv_hdr
, conn
);
2143 case RELAYD_QUIESCENT_CONTROL
:
2144 ret
= relay_quiescent_control(recv_hdr
, conn
);
2146 case RELAYD_BEGIN_DATA_PENDING
:
2147 ret
= relay_begin_data_pending(recv_hdr
, conn
);
2149 case RELAYD_END_DATA_PENDING
:
2150 ret
= relay_end_data_pending(recv_hdr
, conn
);
2152 case RELAYD_SEND_INDEX
:
2153 ret
= relay_recv_index(recv_hdr
, conn
);
2155 case RELAYD_STREAMS_SENT
:
2156 ret
= relay_streams_sent(recv_hdr
, conn
);
2158 case RELAYD_UPDATE_SYNC_INFO
:
2160 ERR("Received unknown command (%u)", be32toh(recv_hdr
->cmd
));
2161 relay_unknown_command(conn
);
2171 * Handle index for a data stream.
2173 * RCU read side lock MUST be acquired.
2175 * Return 0 on success else a negative value.
2177 static int handle_index_data(struct relay_stream
*stream
, uint64_t net_seq_num
,
2180 int ret
= 0, index_created
= 0;
2181 uint64_t stream_id
, data_offset
;
2182 struct relay_index
*index
, *wr_index
= NULL
;
2186 stream_id
= stream
->stream_handle
;
2187 /* Get data offset because we are about to update the index. */
2188 data_offset
= htobe64(stream
->tracefile_size_current
);
2191 * Lookup for an existing index for that stream id/sequence number. If on
2192 * exists, the control thread already received the data for it thus we need
2193 * to write it on disk.
2195 index
= relay_index_find(stream_id
, net_seq_num
);
2197 /* A successful creation will add the object to the HT. */
2198 index
= relay_index_create(stream_id
, net_seq_num
);
2204 stream
->indexes_in_flight
++;
2207 if (rotate_index
|| stream
->index_fd
< 0) {
2208 index
->to_close_fd
= stream
->index_fd
;
2209 ret
= index_create_file(stream
->path_name
, stream
->channel_name
,
2210 relayd_uid
, relayd_gid
, stream
->tracefile_size
,
2211 stream
->tracefile_count_current
);
2213 /* This will close the stream's index fd if one. */
2214 relay_index_free_safe(index
);
2217 stream
->index_fd
= ret
;
2219 index
->fd
= stream
->index_fd
;
2220 index
->index_data
.offset
= data_offset
;
2222 if (index_created
) {
2224 * Try to add the relay index object to the hash table. If an object
2225 * already exist, destroy back the index created and set the data.
2227 relay_index_add(index
, &wr_index
);
2229 /* Copy back data from the created index. */
2230 wr_index
->fd
= index
->fd
;
2231 wr_index
->to_close_fd
= index
->to_close_fd
;
2232 wr_index
->index_data
.offset
= data_offset
;
2236 /* The index already exists so write it on disk. */
2240 /* Do we have a writable ready index to write on disk. */
2242 ret
= relay_index_write(wr_index
->fd
, wr_index
);
2246 stream
->total_index_received
++;
2247 stream
->indexes_in_flight
--;
2248 assert(stream
->indexes_in_flight
>= 0);
2256 * relay_process_data: Process the data received on the data socket
2259 int relay_process_data(struct relay_connection
*conn
)
2261 int ret
= 0, rotate_index
= 0;
2263 struct relay_stream
*stream
;
2264 struct lttcomm_relayd_data_hdr data_hdr
;
2266 uint64_t net_seq_num
;
2268 struct relay_session
*session
;
2272 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &data_hdr
,
2273 sizeof(struct lttcomm_relayd_data_hdr
), 0);
2276 /* Orderly shutdown. Not necessary to print an error. */
2277 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
2279 ERR("Unable to receive data header on sock %d", conn
->sock
->fd
);
2285 stream_id
= be64toh(data_hdr
.stream_id
);
2288 stream
= stream_find_by_id(relay_streams_ht
, stream_id
);
2291 goto end_rcu_unlock
;
2294 session
= session_find_by_id(conn
->sessions_ht
, stream
->session_id
);
2297 data_size
= be32toh(data_hdr
.data_size
);
2298 if (data_buffer_size
< data_size
) {
2301 tmp_data_ptr
= realloc(data_buffer
, data_size
);
2302 if (!tmp_data_ptr
) {
2303 ERR("Allocating data buffer");
2306 goto end_rcu_unlock
;
2308 data_buffer
= tmp_data_ptr
;
2309 data_buffer_size
= data_size
;
2311 memset(data_buffer
, 0, data_size
);
2313 net_seq_num
= be64toh(data_hdr
.net_seq_num
);
2315 DBG3("Receiving data of size %u for stream id %" PRIu64
" seqnum %" PRIu64
,
2316 data_size
, stream_id
, net_seq_num
);
2317 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, data_buffer
, data_size
, 0);
2320 /* Orderly shutdown. Not necessary to print an error. */
2321 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
2324 goto end_rcu_unlock
;
2327 /* Check if a rotation is needed. */
2328 if (stream
->tracefile_size
> 0 &&
2329 (stream
->tracefile_size_current
+ data_size
) >
2330 stream
->tracefile_size
) {
2331 struct relay_viewer_stream
*vstream
;
2334 new_id
= (stream
->tracefile_count_current
+ 1) %
2335 stream
->tracefile_count
;
2337 * When we wrap-around back to 0, we start overwriting old
2340 if (!stream
->tracefile_overwrite
&& new_id
== 0) {
2341 stream
->tracefile_overwrite
= 1;
2343 pthread_mutex_lock(&stream
->viewer_stream_rotation_lock
);
2344 if (stream
->tracefile_overwrite
) {
2345 stream
->oldest_tracefile_id
=
2346 (stream
->oldest_tracefile_id
+ 1) %
2347 stream
->tracefile_count
;
2349 vstream
= viewer_stream_find_by_id(stream
->stream_handle
);
2352 * The viewer is reading a file about to be
2353 * overwritten. Close the FDs it is
2354 * currently using and let it handle the fault.
2356 if (vstream
->tracefile_count_current
== new_id
) {
2357 pthread_mutex_lock(&vstream
->overwrite_lock
);
2358 vstream
->abort_flag
= 1;
2359 pthread_mutex_unlock(&vstream
->overwrite_lock
);
2360 DBG("Streaming side setting abort_flag on stream %s_%" PRIu64
"\n",
2361 stream
->channel_name
, new_id
);
2362 } else if (vstream
->tracefile_count_current
==
2363 stream
->tracefile_count_current
) {
2365 * The reader and writer were in the
2366 * same trace file, inform the viewer
2367 * that no new index will ever be added
2370 vstream
->close_write_flag
= 1;
2373 ret
= utils_rotate_stream_file(stream
->path_name
, stream
->channel_name
,
2374 stream
->tracefile_size
, stream
->tracefile_count
,
2375 relayd_uid
, relayd_gid
, stream
->fd
,
2376 &(stream
->tracefile_count_current
), &stream
->fd
);
2377 pthread_mutex_unlock(&stream
->viewer_stream_rotation_lock
);
2379 ERR("Rotating stream output file");
2380 goto end_rcu_unlock
;
2382 /* Reset current size because we just perform a stream rotation. */
2383 stream
->tracefile_size_current
= 0;
2388 * Index are handled in protocol version 2.4 and above. Also, snapshot and
2389 * index are NOT supported.
2391 if (session
->minor
>= 4 && !session
->snapshot
) {
2392 ret
= handle_index_data(stream
, net_seq_num
, rotate_index
);
2394 goto end_rcu_unlock
;
2398 /* Write data to stream output fd. */
2399 size_ret
= lttng_write(stream
->fd
, data_buffer
, data_size
);
2400 if (size_ret
< data_size
) {
2401 ERR("Relay error writing data to file");
2403 goto end_rcu_unlock
;
2406 DBG2("Relay wrote %d bytes to tracefile for stream id %" PRIu64
,
2407 ret
, stream
->stream_handle
);
2409 ret
= write_padding_to_file(stream
->fd
, be32toh(data_hdr
.padding_size
));
2411 goto end_rcu_unlock
;
2413 stream
->tracefile_size_current
+= data_size
+ be32toh(data_hdr
.padding_size
);
2415 stream
->prev_seq
= net_seq_num
;
2417 try_close_stream(session
, stream
);
2426 void cleanup_connection_pollfd(struct lttng_poll_event
*events
, int pollfd
)
2432 (void) lttng_poll_del(events
, pollfd
);
2434 ret
= close(pollfd
);
2436 ERR("Closing pollfd %d", pollfd
);
2440 static void destroy_connection(struct lttng_ht
*relay_connections_ht
,
2441 struct relay_connection
*conn
)
2443 assert(relay_connections_ht
);
2446 connection_delete(relay_connections_ht
, conn
);
2448 /* For the control socket, we try to destroy the session. */
2449 if (conn
->type
== RELAY_CONTROL
&& conn
->session
) {
2450 destroy_session(conn
->session
, conn
->sessions_ht
);
2453 connection_destroy(conn
);
2457 * This thread does the actual work
2460 void *relay_thread_worker(void *data
)
2462 int ret
, err
= -1, last_seen_data_fd
= -1;
2464 struct relay_connection
*conn
;
2465 struct lttng_poll_event events
;
2466 struct lttng_ht
*relay_connections_ht
;
2467 struct lttng_ht_iter iter
;
2468 struct lttcomm_relayd_hdr recv_hdr
;
2469 struct relay_local_data
*relay_ctx
= (struct relay_local_data
*) data
;
2470 struct lttng_ht
*sessions_ht
= relay_ctx
->sessions_ht
;
2471 struct relay_index
*index
;
2473 DBG("[thread] Relay worker started");
2475 rcu_register_thread();
2477 health_register(health_relayd
, HEALTH_RELAYD_TYPE_WORKER
);
2479 if (testpoint(relayd_thread_worker
)) {
2480 goto error_testpoint
;
2483 health_code_update();
2485 /* table of connections indexed on socket */
2486 relay_connections_ht
= lttng_ht_new(0, LTTNG_HT_TYPE_ULONG
);
2487 if (!relay_connections_ht
) {
2488 goto relay_connections_ht_error
;
2491 /* Tables of received indexes indexed by index handle and net_seq_num. */
2492 indexes_ht
= lttng_ht_new(0, LTTNG_HT_TYPE_TWO_U64
);
2494 goto indexes_ht_error
;
2497 ret
= create_thread_poll_set(&events
, 2);
2499 goto error_poll_create
;
2502 ret
= lttng_poll_add(&events
, relay_conn_pipe
[0], LPOLLIN
| LPOLLRDHUP
);
2509 int idx
= -1, i
, seen_control
= 0, last_notdel_data_fd
= -1;
2511 health_code_update();
2513 /* Infinite blocking call, waiting for transmission */
2514 DBG3("Relayd worker thread polling...");
2515 health_poll_entry();
2516 ret
= lttng_poll_wait(&events
, -1);
2520 * Restart interrupted system call.
2522 if (errno
== EINTR
) {
2531 * Process control. The control connection is prioritised so we don't
2532 * starve it with high throughout put tracing data on the data
2535 for (i
= 0; i
< nb_fd
; i
++) {
2536 /* Fetch once the poll data */
2537 uint32_t revents
= LTTNG_POLL_GETEV(&events
, i
);
2538 int pollfd
= LTTNG_POLL_GETFD(&events
, i
);
2540 health_code_update();
2543 /* No activity for this FD (poll implementation). */
2547 /* Thread quit pipe has been closed. Killing thread. */
2548 ret
= check_thread_quit_pipe(pollfd
, revents
);
2554 /* Inspect the relay conn pipe for new connection */
2555 if (pollfd
== relay_conn_pipe
[0]) {
2556 if (revents
& (LPOLLERR
| LPOLLHUP
| LPOLLRDHUP
)) {
2557 ERR("Relay connection pipe error");
2559 } else if (revents
& LPOLLIN
) {
2560 ret
= lttng_read(relay_conn_pipe
[0], &conn
, sizeof(conn
));
2564 conn
->sessions_ht
= sessions_ht
;
2565 connection_init(conn
);
2566 lttng_poll_add(&events
, conn
->sock
->fd
,
2567 LPOLLIN
| LPOLLRDHUP
);
2569 lttng_ht_add_unique_ulong(relay_connections_ht
,
2572 DBG("Connection socket %d added", conn
->sock
->fd
);
2576 conn
= connection_find_by_sock(relay_connections_ht
, pollfd
);
2577 /* If not found, there is a synchronization issue. */
2580 if (revents
& (LPOLLERR
| LPOLLHUP
| LPOLLRDHUP
)) {
2581 cleanup_connection_pollfd(&events
, pollfd
);
2582 destroy_connection(relay_connections_ht
, conn
);
2583 if (last_seen_data_fd
== pollfd
) {
2584 last_seen_data_fd
= last_notdel_data_fd
;
2586 } else if (revents
& LPOLLIN
) {
2587 if (conn
->type
== RELAY_CONTROL
) {
2588 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &recv_hdr
,
2589 sizeof(recv_hdr
), 0);
2591 /* Connection closed */
2592 cleanup_connection_pollfd(&events
, pollfd
);
2593 destroy_connection(relay_connections_ht
, conn
);
2594 DBG("Control connection closed with %d", pollfd
);
2596 ret
= relay_process_control(&recv_hdr
, conn
);
2598 /* Clear the session on error. */
2599 cleanup_connection_pollfd(&events
, pollfd
);
2600 destroy_connection(relay_connections_ht
, conn
);
2601 DBG("Connection closed with %d", pollfd
);
2607 * Flag the last seen data fd not deleted. It will be
2608 * used as the last seen fd if any fd gets deleted in
2611 last_notdel_data_fd
= pollfd
;
2614 ERR("Unknown poll events %u for sock %d", revents
, pollfd
);
2621 * The last loop handled a control request, go back to poll to make
2622 * sure we prioritise the control socket.
2628 if (last_seen_data_fd
>= 0) {
2629 for (i
= 0; i
< nb_fd
; i
++) {
2630 int pollfd
= LTTNG_POLL_GETFD(&events
, i
);
2632 health_code_update();
2634 if (last_seen_data_fd
== pollfd
) {
2641 /* Process data connection. */
2642 for (i
= idx
+ 1; i
< nb_fd
; i
++) {
2643 /* Fetch the poll data. */
2644 uint32_t revents
= LTTNG_POLL_GETEV(&events
, i
);
2645 int pollfd
= LTTNG_POLL_GETFD(&events
, i
);
2647 health_code_update();
2650 /* No activity for this FD (poll implementation). */
2654 /* Skip the command pipe. It's handled in the first loop. */
2655 if (pollfd
== relay_conn_pipe
[0]) {
2660 conn
= connection_find_by_sock(relay_connections_ht
, pollfd
);
2662 /* Skip it. Might be removed before. */
2667 if (revents
& LPOLLIN
) {
2668 if (conn
->type
!= RELAY_DATA
) {
2673 ret
= relay_process_data(conn
);
2674 /* Connection closed */
2676 cleanup_connection_pollfd(&events
, pollfd
);
2677 destroy_connection(relay_connections_ht
, conn
);
2678 DBG("Data connection closed with %d", pollfd
);
2680 * Every goto restart call sets the last seen fd where
2681 * here we don't really care since we gracefully
2682 * continue the loop after the connection is deleted.
2685 /* Keep last seen port. */
2686 last_seen_data_fd
= pollfd
;
2693 last_seen_data_fd
= -1;
2696 /* Normal exit, no error */
2701 lttng_poll_clean(&events
);
2703 /* Cleanup reamaining connection object. */
2705 cds_lfht_for_each_entry(relay_connections_ht
->ht
, &iter
.iter
, conn
,
2707 health_code_update();
2708 destroy_connection(relay_connections_ht
, conn
);
2713 cds_lfht_for_each_entry(indexes_ht
->ht
, &iter
.iter
, index
,
2715 health_code_update();
2716 relay_index_delete(index
);
2717 relay_index_free_safe(index
);
2720 lttng_ht_destroy(indexes_ht
);
2722 lttng_ht_destroy(relay_connections_ht
);
2723 relay_connections_ht_error
:
2724 /* Close relay conn pipes */
2725 utils_close_pipe(relay_conn_pipe
);
2727 DBG("Thread exited with error");
2729 DBG("Worker thread cleanup complete");
2734 ERR("Health error occurred in %s", __func__
);
2736 health_unregister(health_relayd
);
2737 rcu_unregister_thread();
2738 lttng_relay_stop_threads();
2743 * Create the relay command pipe to wake thread_manage_apps.
2744 * Closed in cleanup().
2746 static int create_relay_conn_pipe(void)
2750 ret
= utils_create_pipe_cloexec(relay_conn_pipe
);
2758 int main(int argc
, char **argv
)
2760 int ret
= 0, retval
= 0;
2762 struct relay_local_data
*relay_ctx
= NULL
;
2764 /* Parse arguments */
2766 if (set_options(argc
, argv
)) {
2771 if (set_signal_handler()) {
2776 /* Try to create directory if -o, --output is specified. */
2777 if (opt_output_path
) {
2778 if (*opt_output_path
!= '/') {
2779 ERR("Please specify an absolute path for -o, --output PATH");
2784 ret
= utils_mkdir_recursive(opt_output_path
, S_IRWXU
| S_IRWXG
,
2787 ERR("Unable to create %s", opt_output_path
);
2794 if (opt_daemon
|| opt_background
) {
2797 ret
= lttng_daemonize(&child_ppid
, &recv_child_signal
,
2805 * We are in the child. Make sure all other file
2806 * descriptors are closed, in case we are called with
2807 * more opened file descriptors than the standard ones.
2809 for (i
= 3; i
< sysconf(_SC_OPEN_MAX
); i
++) {
2815 /* Initialize thread health monitoring */
2816 health_relayd
= health_app_create(NR_HEALTH_RELAYD_TYPES
);
2817 if (!health_relayd
) {
2818 PERROR("health_app_create error");
2820 goto exit_health_app_create
;
2823 /* Create thread quit pipe */
2824 if (init_thread_quit_pipe()) {
2826 goto exit_init_data
;
2829 /* We need those values for the file/dir creation. */
2830 relayd_uid
= getuid();
2831 relayd_gid
= getgid();
2833 /* Check if daemon is UID = 0 */
2834 if (relayd_uid
== 0) {
2835 if (control_uri
->port
< 1024 || data_uri
->port
< 1024 || live_uri
->port
< 1024) {
2836 ERR("Need to be root to use ports < 1024");
2838 goto exit_init_data
;
2842 /* Setup the thread apps communication pipe. */
2843 if (create_relay_conn_pipe()) {
2845 goto exit_init_data
;
2848 /* Init relay command queue. */
2849 cds_wfcq_init(&relay_conn_queue
.head
, &relay_conn_queue
.tail
);
2851 /* Set up max poll set size */
2852 lttng_poll_set_max_size();
2854 /* Initialize communication library */
2856 lttcomm_inet_init();
2858 relay_ctx
= zmalloc(sizeof(struct relay_local_data
));
2860 PERROR("relay_ctx");
2862 goto exit_init_data
;
2865 /* tables of sessions indexed by session ID */
2866 relay_ctx
->sessions_ht
= lttng_ht_new(0, LTTNG_HT_TYPE_U64
);
2867 if (!relay_ctx
->sessions_ht
) {
2869 goto exit_init_data
;
2872 /* tables of streams indexed by stream ID */
2873 relay_streams_ht
= lttng_ht_new(0, LTTNG_HT_TYPE_U64
);
2874 if (!relay_streams_ht
) {
2876 goto exit_init_data
;
2879 /* tables of streams indexed by stream ID */
2880 viewer_streams_ht
= lttng_ht_new(0, LTTNG_HT_TYPE_U64
);
2881 if (!viewer_streams_ht
) {
2883 goto exit_init_data
;
2886 ret
= utils_create_pipe(health_quit_pipe
);
2889 goto exit_health_quit_pipe
;
2892 /* Create thread to manage the client socket */
2893 ret
= pthread_create(&health_thread
, NULL
,
2894 thread_manage_health
, (void *) NULL
);
2897 PERROR("pthread_create health");
2899 goto exit_health_thread
;
2902 /* Setup the dispatcher thread */
2903 ret
= pthread_create(&dispatcher_thread
, NULL
,
2904 relay_thread_dispatcher
, (void *) NULL
);
2907 PERROR("pthread_create dispatcher");
2909 goto exit_dispatcher_thread
;
2912 /* Setup the worker thread */
2913 ret
= pthread_create(&worker_thread
, NULL
,
2914 relay_thread_worker
, (void *) relay_ctx
);
2917 PERROR("pthread_create worker");
2919 goto exit_worker_thread
;
2922 /* Setup the listener thread */
2923 ret
= pthread_create(&listener_thread
, NULL
,
2924 relay_thread_listener
, (void *) NULL
);
2927 PERROR("pthread_create listener");
2929 goto exit_listener_thread
;
2932 ret
= relayd_live_create(live_uri
, relay_ctx
);
2934 ERR("Starting live viewer threads");
2940 * This is where we start awaiting program completion (e.g. through
2941 * signal that asks threads to teardown).
2944 ret
= relayd_live_join();
2950 ret
= pthread_join(listener_thread
, &status
);
2953 PERROR("pthread_join listener_thread");
2957 exit_listener_thread
:
2958 ret
= pthread_join(worker_thread
, &status
);
2961 PERROR("pthread_join worker_thread");
2966 ret
= pthread_join(dispatcher_thread
, &status
);
2969 PERROR("pthread_join dispatcher_thread");
2972 exit_dispatcher_thread
:
2974 ret
= pthread_join(health_thread
, &status
);
2977 PERROR("pthread_join health_thread");
2982 utils_close_pipe(health_quit_pipe
);
2983 exit_health_quit_pipe
:
2986 health_app_destroy(health_relayd
);
2987 exit_health_app_create
:
2989 relayd_cleanup(relay_ctx
);