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.
31 #include <sys/mount.h>
32 #include <sys/resource.h>
33 #include <sys/socket.h>
35 #include <sys/types.h>
38 #include <urcu/futex.h>
39 #include <urcu/uatomic.h>
44 #include <lttng/lttng.h>
45 #include <common/common.h>
46 #include <common/compat/poll.h>
47 #include <common/compat/socket.h>
48 #include <common/compat/endian.h>
49 #include <common/defaults.h>
50 #include <common/daemonize.h>
51 #include <common/futex.h>
52 #include <common/sessiond-comm/sessiond-comm.h>
53 #include <common/sessiond-comm/inet.h>
54 #include <common/sessiond-comm/relayd.h>
55 #include <common/uri.h>
56 #include <common/utils.h>
57 #include <common/config/config.h>
60 #include "ctf-trace.h"
63 #include "lttng-relayd.h"
65 #include "health-relayd.h"
66 #include "testpoint.h"
67 #include "viewer-stream.h"
70 #include "connection.h"
72 /* command line options */
73 char *opt_output_path
;
74 static int opt_daemon
, opt_background
;
77 * We need to wait for listener and live listener threads, as well as
78 * health check thread, before being ready to signal readiness.
80 #define NR_LTTNG_RELAY_READY 3
81 static int lttng_relay_ready
= NR_LTTNG_RELAY_READY
;
82 static int recv_child_signal
; /* Set to 1 when a SIGUSR1 signal is received. */
83 static pid_t child_ppid
; /* Internal parent PID use with daemonize. */
85 static struct lttng_uri
*control_uri
;
86 static struct lttng_uri
*data_uri
;
87 static struct lttng_uri
*live_uri
;
91 const char *tracing_group_name
= DEFAULT_TRACING_GROUP
;
92 static int tracing_group_name_override
;
94 const char * const config_section_name
= "relayd";
97 * Quit pipe for all threads. This permits a single cancellation point
98 * for all threads when receiving an event on the pipe.
100 int thread_quit_pipe
[2] = { -1, -1 };
103 * This pipe is used to inform the worker thread that a command is queued and
104 * ready to be processed.
106 static int relay_conn_pipe
[2] = { -1, -1 };
108 /* Shared between threads */
109 static int dispatch_thread_exit
;
111 static pthread_t listener_thread
;
112 static pthread_t dispatcher_thread
;
113 static pthread_t worker_thread
;
114 static pthread_t health_thread
;
116 static uint64_t last_relay_stream_id
;
119 * Relay command queue.
121 * The relay_thread_listener and relay_thread_dispatcher communicate with this
124 static struct relay_conn_queue relay_conn_queue
;
126 /* buffer allocated at startup, used to store the trace data */
127 static char *data_buffer
;
128 static unsigned int data_buffer_size
;
130 /* We need those values for the file/dir creation. */
131 static uid_t relayd_uid
;
132 static gid_t relayd_gid
;
134 /* Global relay stream hash table. */
135 struct lttng_ht
*relay_streams_ht
;
137 /* Global relay viewer stream hash table. */
138 struct lttng_ht
*viewer_streams_ht
;
140 /* Global hash table that stores relay index object. */
141 struct lttng_ht
*indexes_ht
;
143 /* Relayd health monitoring */
144 struct health_app
*health_relayd
;
146 static struct option long_options
[] = {
147 { "control-port", 1, 0, 'C', },
148 { "data-port", 1, 0, 'D', },
149 { "live-port", 1, 0, 'L', },
150 { "daemonize", 0, 0, 'd', },
151 { "background", 0, 0, 'b', },
152 { "group", 1, 0, 'g', },
153 { "help", 0, 0, 'h', },
154 { "output", 1, 0, 'o', },
155 { "verbose", 0, 0, 'v', },
156 { "config", 1, 0, 'f' },
160 static const char *config_ignore_options
[] = { "help", "config" };
163 * usage function on stderr
168 fprintf(stderr
, "Usage: %s OPTIONS\n\nOptions:\n", progname
);
169 fprintf(stderr
, " -h, --help Display this usage.\n");
170 fprintf(stderr
, " -d, --daemonize Start as a daemon.\n");
171 fprintf(stderr
, " -b, --background Start as a daemon, keeping console open.\n");
172 fprintf(stderr
, " -C, --control-port URL Control port listening.\n");
173 fprintf(stderr
, " -D, --data-port URL Data port listening.\n");
174 fprintf(stderr
, " -L, --live-port URL Live view port listening.\n");
175 fprintf(stderr
, " -o, --output PATH Output path for traces. Must use an absolute path.\n");
176 fprintf(stderr
, " -v, --verbose Verbose mode. Activate DBG() macro.\n");
177 fprintf(stderr
, " -g, --group NAME Specify the tracing group name. (default: tracing)\n");
178 fprintf(stderr
, " -f --config Load daemon configuration file\n");
182 * Take an option from the getopt output and set it in the right variable to be
185 * Return 0 on success else a negative value.
188 int set_option(int opt
, const char *arg
, const char *optname
)
194 fprintf(stderr
, "option %s", optname
);
196 fprintf(stderr
, " with arg %s\n", arg
);
200 ret
= uri_parse(arg
, &control_uri
);
202 ERR("Invalid control URI specified");
205 if (control_uri
->port
== 0) {
206 control_uri
->port
= DEFAULT_NETWORK_CONTROL_PORT
;
210 ret
= uri_parse(arg
, &data_uri
);
212 ERR("Invalid data URI specified");
215 if (data_uri
->port
== 0) {
216 data_uri
->port
= DEFAULT_NETWORK_DATA_PORT
;
220 ret
= uri_parse(arg
, &live_uri
);
222 ERR("Invalid live URI specified");
225 if (live_uri
->port
== 0) {
226 live_uri
->port
= DEFAULT_NETWORK_VIEWER_PORT
;
236 tracing_group_name
= strdup(arg
);
237 if (tracing_group_name
== NULL
) {
242 tracing_group_name_override
= 1;
248 ret
= asprintf(&opt_output_path
, "%s", arg
);
251 PERROR("asprintf opt_output_path");
256 /* Verbose level can increase using multiple -v */
258 lttng_opt_verbose
= config_parse_value(arg
);
260 /* Only 3 level of verbosity (-vvv). */
261 if (lttng_opt_verbose
< 3) {
262 lttng_opt_verbose
+= 1;
267 /* Unknown option or other error.
268 * Error is printed by getopt, just return */
281 * config_entry_handler_cb used to handle options read from a config file.
282 * See config_entry_handler_cb comment in common/config/config.h for the
283 * return value conventions.
286 int config_entry_handler(const struct config_entry
*entry
, void *unused
)
290 if (!entry
|| !entry
->name
|| !entry
->value
) {
295 /* Check if the option is to be ignored */
296 for (i
= 0; i
< sizeof(config_ignore_options
) / sizeof(char *); i
++) {
297 if (!strcmp(entry
->name
, config_ignore_options
[i
])) {
302 for (i
= 0; i
< (sizeof(long_options
) / sizeof(struct option
)) - 1; i
++) {
303 /* Ignore if entry name is not fully matched. */
304 if (strcmp(entry
->name
, long_options
[i
].name
)) {
309 * If the option takes no argument on the command line, we have to
310 * check if the value is "true". We support non-zero numeric values,
313 if (!long_options
[i
].has_arg
) {
314 ret
= config_parse_value(entry
->value
);
317 WARN("Invalid configuration value \"%s\" for option %s",
318 entry
->value
, entry
->name
);
320 /* False, skip boolean config option. */
325 ret
= set_option(long_options
[i
].val
, entry
->value
, entry
->name
);
329 WARN("Unrecognized option \"%s\" in daemon configuration file.",
337 int set_options(int argc
, char **argv
)
339 int c
, ret
= 0, option_index
= 0, retval
= 0;
340 int orig_optopt
= optopt
, orig_optind
= optind
;
341 char *default_address
, *optstring
;
342 const char *config_path
= NULL
;
344 optstring
= utils_generate_optstring(long_options
,
345 sizeof(long_options
) / sizeof(struct option
));
351 /* Check for the --config option */
353 while ((c
= getopt_long(argc
, argv
, optstring
, long_options
,
354 &option_index
)) != -1) {
358 } else if (c
!= 'f') {
362 config_path
= utils_expand_path(optarg
);
364 ERR("Failed to resolve path: %s", optarg
);
368 ret
= config_get_section_entries(config_path
, config_section_name
,
369 config_entry_handler
, NULL
);
372 ERR("Invalid configuration option at line %i", ret
);
378 /* Reset getopt's global state */
379 optopt
= orig_optopt
;
380 optind
= orig_optind
;
382 c
= getopt_long(argc
, argv
, optstring
, long_options
, &option_index
);
387 ret
= set_option(c
, optarg
, long_options
[option_index
].name
);
394 /* assign default values */
395 if (control_uri
== NULL
) {
396 ret
= asprintf(&default_address
,
397 "tcp://" DEFAULT_NETWORK_CONTROL_BIND_ADDRESS
":%d",
398 DEFAULT_NETWORK_CONTROL_PORT
);
400 PERROR("asprintf default data address");
405 ret
= uri_parse(default_address
, &control_uri
);
406 free(default_address
);
408 ERR("Invalid control URI specified");
413 if (data_uri
== NULL
) {
414 ret
= asprintf(&default_address
,
415 "tcp://" DEFAULT_NETWORK_DATA_BIND_ADDRESS
":%d",
416 DEFAULT_NETWORK_DATA_PORT
);
418 PERROR("asprintf default data address");
423 ret
= uri_parse(default_address
, &data_uri
);
424 free(default_address
);
426 ERR("Invalid data URI specified");
431 if (live_uri
== NULL
) {
432 ret
= asprintf(&default_address
,
433 "tcp://" DEFAULT_NETWORK_VIEWER_BIND_ADDRESS
":%d",
434 DEFAULT_NETWORK_VIEWER_PORT
);
436 PERROR("asprintf default viewer control address");
441 ret
= uri_parse(default_address
, &live_uri
);
442 free(default_address
);
444 ERR("Invalid viewer control URI specified");
459 void relayd_cleanup(struct relay_local_data
*relay_ctx
)
463 if (viewer_streams_ht
)
464 lttng_ht_destroy(viewer_streams_ht
);
465 if (relay_streams_ht
)
466 lttng_ht_destroy(relay_streams_ht
);
467 if (relay_ctx
&& relay_ctx
->sessions_ht
)
468 lttng_ht_destroy(relay_ctx
->sessions_ht
);
471 /* free the dynamically allocated opt_output_path */
472 free(opt_output_path
);
474 /* Close thread quit pipes */
475 utils_close_pipe(thread_quit_pipe
);
477 uri_free(control_uri
);
479 /* Live URI is freed in the live thread. */
481 if (tracing_group_name_override
) {
482 free((void *) tracing_group_name
);
487 * Write to writable pipe used to notify a thread.
490 int notify_thread_pipe(int wpipe
)
494 ret
= lttng_write(wpipe
, "!", 1);
496 PERROR("write poll pipe");
505 int notify_health_quit_pipe(int *pipe
)
509 ret
= lttng_write(pipe
[1], "4", 1);
511 PERROR("write relay health quit");
520 * Stop all relayd and relayd-live threads.
522 int lttng_relay_stop_threads(void)
526 /* Stopping all threads */
527 DBG("Terminating all threads");
528 if (notify_thread_pipe(thread_quit_pipe
[1])) {
529 ERR("write error on thread quit pipe");
533 if (notify_health_quit_pipe(health_quit_pipe
)) {
534 ERR("write error on health quit pipe");
537 /* Dispatch thread */
538 CMM_STORE_SHARED(dispatch_thread_exit
, 1);
539 futex_nto1_wake(&relay_conn_queue
.futex
);
541 if (relayd_live_stop()) {
542 ERR("Error stopping live threads");
549 * Signal handler for the daemon
551 * Simply stop all worker threads, leaving main() return gracefully after
552 * joining all threads and calling cleanup().
555 void sighandler(int sig
)
559 DBG("SIGPIPE caught");
562 DBG("SIGINT caught");
563 if (lttng_relay_stop_threads()) {
564 ERR("Error stopping threads");
568 DBG("SIGTERM caught");
569 if (lttng_relay_stop_threads()) {
570 ERR("Error stopping threads");
574 CMM_STORE_SHARED(recv_child_signal
, 1);
582 * Setup signal handler for :
583 * SIGINT, SIGTERM, SIGPIPE
586 int set_signal_handler(void)
592 if ((ret
= sigemptyset(&sigset
)) < 0) {
593 PERROR("sigemptyset");
597 sa
.sa_handler
= sighandler
;
600 if ((ret
= sigaction(SIGTERM
, &sa
, NULL
)) < 0) {
605 if ((ret
= sigaction(SIGINT
, &sa
, NULL
)) < 0) {
610 if ((ret
= sigaction(SIGPIPE
, &sa
, NULL
)) < 0) {
615 if ((ret
= sigaction(SIGUSR1
, &sa
, NULL
)) < 0) {
620 DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT");
625 void lttng_relay_notify_ready(void)
627 /* Notify the parent of the fork() process that we are ready. */
628 if (opt_daemon
|| opt_background
) {
629 if (uatomic_sub_return(<tng_relay_ready
, 1) == 0) {
630 kill(child_ppid
, SIGUSR1
);
636 * Init thread quit pipe.
638 * Return -1 on error or 0 if all pipes are created.
641 int init_thread_quit_pipe(void)
645 ret
= utils_create_pipe_cloexec(thread_quit_pipe
);
651 * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set.
654 int create_thread_poll_set(struct lttng_poll_event
*events
, int size
)
658 if (events
== NULL
|| size
== 0) {
663 ret
= lttng_poll_create(events
, size
, LTTNG_CLOEXEC
);
669 ret
= lttng_poll_add(events
, thread_quit_pipe
[0], LPOLLIN
| LPOLLERR
);
681 * Check if the thread quit pipe was triggered.
683 * Return 1 if it was triggered else 0;
686 int check_thread_quit_pipe(int fd
, uint32_t events
)
688 if (fd
== thread_quit_pipe
[0] && (events
& LPOLLIN
)) {
696 * Create and init socket from uri.
699 struct lttcomm_sock
*relay_init_sock(struct lttng_uri
*uri
)
702 struct lttcomm_sock
*sock
= NULL
;
704 sock
= lttcomm_alloc_sock_from_uri(uri
);
706 ERR("Allocating socket");
710 ret
= lttcomm_create_sock(sock
);
714 DBG("Listening on sock %d", sock
->fd
);
716 ret
= sock
->ops
->bind(sock
);
721 ret
= sock
->ops
->listen(sock
, -1);
731 lttcomm_destroy_sock(sock
);
737 * Return nonzero if stream needs to be closed.
740 int close_stream_check(struct relay_stream
*stream
)
742 if (stream
->close_flag
&& stream
->prev_seq
== stream
->last_net_seq_num
) {
744 * We are about to close the stream so set the data pending flag to 1
745 * which will make the end data pending command skip the stream which
746 * is now closed and ready. Note that after proceeding to a file close,
747 * the written file is ready for reading.
749 stream
->data_pending_check_done
= 1;
755 static void try_close_stream(struct relay_session
*session
,
756 struct relay_stream
*stream
)
759 struct ctf_trace
*ctf_trace
;
764 if (!close_stream_check(stream
)) {
765 /* Can't close it, not ready for that. */
769 ctf_trace
= ctf_trace_find_by_path(session
->ctf_traces_ht
,
773 pthread_mutex_lock(&session
->viewer_ready_lock
);
774 ctf_trace
->invalid_flag
= 1;
775 pthread_mutex_unlock(&session
->viewer_ready_lock
);
777 ret
= stream_close(session
, stream
);
778 if (ret
|| session
->snapshot
) {
779 /* Already close thus the ctf trace is being or has been destroyed. */
783 ctf_trace_try_destroy(session
, ctf_trace
);
790 * This thread manages the listening for new connections on the network
793 void *relay_thread_listener(void *data
)
795 int i
, ret
, pollfd
, err
= -1;
796 uint32_t revents
, nb_fd
;
797 struct lttng_poll_event events
;
798 struct lttcomm_sock
*control_sock
, *data_sock
;
800 DBG("[thread] Relay listener started");
802 health_register(health_relayd
, HEALTH_RELAYD_TYPE_LISTENER
);
804 health_code_update();
806 control_sock
= relay_init_sock(control_uri
);
808 goto error_sock_control
;
811 data_sock
= relay_init_sock(data_uri
);
813 goto error_sock_relay
;
817 * Pass 3 as size here for the thread quit pipe, control and data socket.
819 ret
= create_thread_poll_set(&events
, 3);
821 goto error_create_poll
;
824 /* Add the control socket */
825 ret
= lttng_poll_add(&events
, control_sock
->fd
, LPOLLIN
| LPOLLRDHUP
);
830 /* Add the data socket */
831 ret
= lttng_poll_add(&events
, data_sock
->fd
, LPOLLIN
| LPOLLRDHUP
);
836 lttng_relay_notify_ready();
838 if (testpoint(relayd_thread_listener
)) {
839 goto error_testpoint
;
843 health_code_update();
845 DBG("Listener accepting connections");
849 ret
= lttng_poll_wait(&events
, -1);
853 * Restart interrupted system call.
855 if (errno
== EINTR
) {
863 DBG("Relay new connection received");
864 for (i
= 0; i
< nb_fd
; i
++) {
865 health_code_update();
867 /* Fetch once the poll data */
868 revents
= LTTNG_POLL_GETEV(&events
, i
);
869 pollfd
= LTTNG_POLL_GETFD(&events
, i
);
872 /* No activity for this FD (poll implementation). */
876 /* Thread quit pipe has been closed. Killing thread. */
877 ret
= check_thread_quit_pipe(pollfd
, revents
);
883 if (revents
& (LPOLLERR
| LPOLLHUP
| LPOLLRDHUP
)) {
884 ERR("socket poll error");
886 } else if (revents
& LPOLLIN
) {
888 * Get allocated in this thread, enqueued to a global queue,
889 * dequeued and freed in the worker thread.
892 struct relay_connection
*new_conn
;
893 struct lttcomm_sock
*newsock
;
895 new_conn
= connection_create();
900 if (pollfd
== data_sock
->fd
) {
901 new_conn
->type
= RELAY_DATA
;
902 newsock
= data_sock
->ops
->accept(data_sock
);
903 DBG("Relay data connection accepted, socket %d",
906 assert(pollfd
== control_sock
->fd
);
907 new_conn
->type
= RELAY_CONTROL
;
908 newsock
= control_sock
->ops
->accept(control_sock
);
909 DBG("Relay control connection accepted, socket %d",
913 PERROR("accepting sock");
914 connection_free(new_conn
);
918 ret
= setsockopt(newsock
->fd
, SOL_SOCKET
, SO_REUSEADDR
, &val
,
921 PERROR("setsockopt inet");
922 lttcomm_destroy_sock(newsock
);
923 connection_free(new_conn
);
926 new_conn
->sock
= newsock
;
928 /* Enqueue request for the dispatcher thread. */
929 cds_wfcq_enqueue(&relay_conn_queue
.head
, &relay_conn_queue
.tail
,
933 * Wake the dispatch queue futex. Implicit memory barrier with
934 * the exchange in cds_wfcq_enqueue.
936 futex_nto1_wake(&relay_conn_queue
.futex
);
945 lttng_poll_clean(&events
);
947 if (data_sock
->fd
>= 0) {
948 ret
= data_sock
->ops
->close(data_sock
);
953 lttcomm_destroy_sock(data_sock
);
955 if (control_sock
->fd
>= 0) {
956 ret
= control_sock
->ops
->close(control_sock
);
961 lttcomm_destroy_sock(control_sock
);
965 ERR("Health error occurred in %s", __func__
);
967 health_unregister(health_relayd
);
968 DBG("Relay listener thread cleanup complete");
969 lttng_relay_stop_threads();
974 * This thread manages the dispatching of the requests to worker threads
977 void *relay_thread_dispatcher(void *data
)
981 struct cds_wfcq_node
*node
;
982 struct relay_connection
*new_conn
= NULL
;
984 DBG("[thread] Relay dispatcher started");
986 health_register(health_relayd
, HEALTH_RELAYD_TYPE_DISPATCHER
);
988 if (testpoint(relayd_thread_dispatcher
)) {
989 goto error_testpoint
;
992 health_code_update();
994 while (!CMM_LOAD_SHARED(dispatch_thread_exit
)) {
995 health_code_update();
997 /* Atomically prepare the queue futex */
998 futex_nto1_prepare(&relay_conn_queue
.futex
);
1001 health_code_update();
1003 /* Dequeue commands */
1004 node
= cds_wfcq_dequeue_blocking(&relay_conn_queue
.head
,
1005 &relay_conn_queue
.tail
);
1007 DBG("Woken up but nothing in the relay command queue");
1008 /* Continue thread execution */
1011 new_conn
= caa_container_of(node
, struct relay_connection
, qnode
);
1013 DBG("Dispatching request waiting on sock %d", new_conn
->sock
->fd
);
1016 * Inform worker thread of the new request. This call is blocking
1017 * so we can be assured that the data will be read at some point in
1018 * time or wait to the end of the world :)
1020 ret
= lttng_write(relay_conn_pipe
[1], &new_conn
, sizeof(new_conn
));
1022 PERROR("write connection pipe");
1023 connection_destroy(new_conn
);
1026 } while (node
!= NULL
);
1028 /* Futex wait on queue. Blocking call on futex() */
1029 health_poll_entry();
1030 futex_nto1_wait(&relay_conn_queue
.futex
);
1034 /* Normal exit, no error */
1041 ERR("Health error occurred in %s", __func__
);
1043 health_unregister(health_relayd
);
1044 DBG("Dispatch thread dying");
1045 lttng_relay_stop_threads();
1049 static void try_close_streams(struct relay_session
*session
)
1051 struct ctf_trace
*ctf_trace
;
1052 struct lttng_ht_iter iter
;
1056 pthread_mutex_lock(&session
->viewer_ready_lock
);
1058 cds_lfht_for_each_entry(session
->ctf_traces_ht
->ht
, &iter
.iter
, ctf_trace
,
1060 struct relay_stream
*stream
;
1062 /* Close streams. */
1063 cds_list_for_each_entry(stream
, &ctf_trace
->stream_list
, trace_list
) {
1064 stream_close(session
, stream
);
1067 ctf_trace
->invalid_flag
= 1;
1068 ctf_trace_try_destroy(session
, ctf_trace
);
1071 pthread_mutex_unlock(&session
->viewer_ready_lock
);
1075 * Try to destroy a session within a connection.
1077 static void destroy_session(struct relay_session
*session
,
1078 struct lttng_ht
*sessions_ht
)
1081 assert(sessions_ht
);
1083 /* Indicate that this session can be destroyed from now on. */
1084 session
->close_flag
= 1;
1086 try_close_streams(session
);
1089 * This will try to delete and destroy the session if no viewer is attached
1090 * to it meaning the refcount is down to zero.
1092 session_try_destroy(sessions_ht
, session
);
1096 * Copy index data from the control port to a given index object.
1098 static void copy_index_control_data(struct relay_index
*index
,
1099 struct lttcomm_relayd_index
*data
)
1105 * The index on disk is encoded in big endian, so we don't need to convert
1106 * the data received on the network. The data_offset value is NEVER
1107 * modified here and is updated by the data thread.
1109 index
->index_data
.packet_size
= data
->packet_size
;
1110 index
->index_data
.content_size
= data
->content_size
;
1111 index
->index_data
.timestamp_begin
= data
->timestamp_begin
;
1112 index
->index_data
.timestamp_end
= data
->timestamp_end
;
1113 index
->index_data
.events_discarded
= data
->events_discarded
;
1114 index
->index_data
.stream_id
= data
->stream_id
;
1118 * Handle the RELAYD_CREATE_SESSION command.
1120 * On success, send back the session id or else return a negative value.
1123 int relay_create_session(struct lttcomm_relayd_hdr
*recv_hdr
,
1124 struct relay_connection
*conn
)
1126 int ret
= 0, send_ret
;
1127 struct relay_session
*session
;
1128 struct lttcomm_relayd_status_session reply
;
1133 memset(&reply
, 0, sizeof(reply
));
1135 session
= session_create();
1140 session
->minor
= conn
->minor
;
1141 session
->major
= conn
->major
;
1142 conn
->session_id
= session
->id
;
1143 conn
->session
= session
;
1145 reply
.session_id
= htobe64(session
->id
);
1147 switch (conn
->minor
) {
1152 case 4: /* LTTng sessiond 2.4 */
1154 ret
= cmd_create_session_2_4(conn
, session
);
1157 lttng_ht_add_unique_u64(conn
->sessions_ht
, &session
->session_n
);
1158 DBG("Created session %" PRIu64
, session
->id
);
1162 reply
.ret_code
= htobe32(LTTNG_ERR_FATAL
);
1164 reply
.ret_code
= htobe32(LTTNG_OK
);
1167 send_ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
1169 ERR("Relayd sending session id");
1177 * When we have received all the streams and the metadata for a channel,
1178 * we make them visible to the viewer threads.
1181 void set_viewer_ready_flag(struct relay_connection
*conn
)
1183 struct relay_stream
*stream
, *tmp_stream
;
1185 pthread_mutex_lock(&conn
->session
->viewer_ready_lock
);
1186 cds_list_for_each_entry_safe(stream
, tmp_stream
, &conn
->recv_head
,
1188 stream
->viewer_ready
= 1;
1189 cds_list_del(&stream
->recv_list
);
1191 pthread_mutex_unlock(&conn
->session
->viewer_ready_lock
);
1196 * Add a recv handle node to the connection recv list with the given stream
1197 * handle. A new node is allocated thus must be freed when the node is deleted
1200 static void queue_stream(struct relay_stream
*stream
,
1201 struct relay_connection
*conn
)
1206 cds_list_add(&stream
->recv_list
, &conn
->recv_head
);
1210 * relay_add_stream: allocate a new stream for a session
1213 int relay_add_stream(struct lttcomm_relayd_hdr
*recv_hdr
,
1214 struct relay_connection
*conn
)
1217 struct relay_session
*session
= conn
->session
;
1218 struct relay_stream
*stream
= NULL
;
1219 struct lttcomm_relayd_status_stream reply
;
1220 struct ctf_trace
*trace
;
1222 if (!session
|| conn
->version_check_done
== 0) {
1223 ERR("Trying to add a stream before version check");
1225 goto end_no_session
;
1228 stream
= zmalloc(sizeof(struct relay_stream
));
1229 if (stream
== NULL
) {
1230 PERROR("relay stream zmalloc");
1232 goto end_no_session
;
1235 switch (conn
->minor
) {
1236 case 1: /* LTTng sessiond 2.1 */
1237 ret
= cmd_recv_stream_2_1(conn
, stream
);
1239 case 2: /* LTTng sessiond 2.2 */
1241 ret
= cmd_recv_stream_2_2(conn
, stream
);
1245 goto err_free_stream
;
1249 stream
->stream_handle
= ++last_relay_stream_id
;
1250 stream
->prev_seq
= -1ULL;
1251 stream
->session_id
= session
->id
;
1252 stream
->index_fd
= -1;
1253 stream
->read_index_fd
= -1;
1254 stream
->ctf_stream_id
= -1ULL;
1255 lttng_ht_node_init_u64(&stream
->node
, stream
->stream_handle
);
1256 pthread_mutex_init(&stream
->lock
, NULL
);
1258 ret
= utils_mkdir_recursive(stream
->path_name
, S_IRWXU
| S_IRWXG
);
1260 ERR("relay creating output directory");
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");
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 */
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 free(stream
->path_name
);
1342 free(stream
->channel_name
);
1348 * relay_close_stream: close a specific stream
1351 int relay_close_stream(struct lttcomm_relayd_hdr
*recv_hdr
,
1352 struct relay_connection
*conn
)
1355 struct relay_session
*session
= conn
->session
;
1356 struct lttcomm_relayd_close_stream stream_info
;
1357 struct lttcomm_relayd_generic_reply reply
;
1358 struct relay_stream
*stream
;
1360 DBG("Close stream received");
1362 if (!session
|| conn
->version_check_done
== 0) {
1363 ERR("Trying to close a stream before version check");
1365 goto end_no_session
;
1368 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &stream_info
,
1369 sizeof(struct lttcomm_relayd_close_stream
), 0);
1370 if (ret
< sizeof(struct lttcomm_relayd_close_stream
)) {
1372 /* Orderly shutdown. Not necessary to print an error. */
1373 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1375 ERR("Relay didn't receive valid add_stream struct size : %d", ret
);
1378 goto end_no_session
;
1382 stream
= stream_find_by_id(relay_streams_ht
,
1383 be64toh(stream_info
.stream_id
));
1389 stream
->last_net_seq_num
= be64toh(stream_info
.last_net_seq_num
);
1390 stream
->close_flag
= 1;
1391 session
->stream_count
--;
1393 /* Check if we can close it or else the data will do it. */
1394 try_close_stream(session
, stream
);
1399 memset(&reply
, 0, sizeof(reply
));
1401 reply
.ret_code
= htobe32(LTTNG_ERR_UNK
);
1403 reply
.ret_code
= htobe32(LTTNG_OK
);
1405 send_ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
,
1406 sizeof(struct lttcomm_relayd_generic_reply
), 0);
1408 ERR("Relay sending stream id");
1417 * relay_unknown_command: send -1 if received unknown command
1420 void relay_unknown_command(struct relay_connection
*conn
)
1422 struct lttcomm_relayd_generic_reply reply
;
1425 memset(&reply
, 0, sizeof(reply
));
1426 reply
.ret_code
= htobe32(LTTNG_ERR_UNK
);
1427 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
,
1428 sizeof(struct lttcomm_relayd_generic_reply
), 0);
1430 ERR("Relay sending unknown command");
1435 * relay_start: send an acknowledgment to the client to tell if we are
1436 * ready to receive data. We are ready if a session is established.
1439 int relay_start(struct lttcomm_relayd_hdr
*recv_hdr
,
1440 struct relay_connection
*conn
)
1442 int ret
= htobe32(LTTNG_OK
);
1443 struct lttcomm_relayd_generic_reply reply
;
1444 struct relay_session
*session
= conn
->session
;
1447 DBG("Trying to start the streaming without a session established");
1448 ret
= htobe32(LTTNG_ERR_UNK
);
1451 memset(&reply
, 0, sizeof(reply
));
1452 reply
.ret_code
= ret
;
1453 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
,
1454 sizeof(struct lttcomm_relayd_generic_reply
), 0);
1456 ERR("Relay sending start ack");
1463 * Append padding to the file pointed by the file descriptor fd.
1465 static int write_padding_to_file(int fd
, uint32_t size
)
1474 zeros
= zmalloc(size
);
1475 if (zeros
== NULL
) {
1476 PERROR("zmalloc zeros for padding");
1481 ret
= lttng_write(fd
, zeros
, size
);
1483 PERROR("write padding to file");
1493 * relay_recv_metadata: receive the metada for the session.
1496 int relay_recv_metadata(struct lttcomm_relayd_hdr
*recv_hdr
,
1497 struct relay_connection
*conn
)
1499 int ret
= htobe32(LTTNG_OK
);
1501 struct relay_session
*session
= conn
->session
;
1502 struct lttcomm_relayd_metadata_payload
*metadata_struct
;
1503 struct relay_stream
*metadata_stream
;
1504 uint64_t data_size
, payload_size
;
1505 struct ctf_trace
*ctf_trace
;
1508 ERR("Metadata sent before version check");
1513 data_size
= payload_size
= be64toh(recv_hdr
->data_size
);
1514 if (data_size
< sizeof(struct lttcomm_relayd_metadata_payload
)) {
1515 ERR("Incorrect data size");
1519 payload_size
-= sizeof(struct lttcomm_relayd_metadata_payload
);
1521 if (data_buffer_size
< data_size
) {
1522 /* In case the realloc fails, we can free the memory */
1525 tmp_data_ptr
= realloc(data_buffer
, data_size
);
1526 if (!tmp_data_ptr
) {
1527 ERR("Allocating data buffer");
1532 data_buffer
= tmp_data_ptr
;
1533 data_buffer_size
= data_size
;
1535 memset(data_buffer
, 0, data_size
);
1536 DBG2("Relay receiving metadata, waiting for %" PRIu64
" bytes", data_size
);
1537 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, data_buffer
, data_size
, 0);
1538 if (ret
< 0 || ret
!= data_size
) {
1540 /* Orderly shutdown. Not necessary to print an error. */
1541 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1543 ERR("Relay didn't receive the whole metadata");
1548 metadata_struct
= (struct lttcomm_relayd_metadata_payload
*) data_buffer
;
1551 metadata_stream
= stream_find_by_id(relay_streams_ht
,
1552 be64toh(metadata_struct
->stream_id
));
1553 if (!metadata_stream
) {
1558 size_ret
= lttng_write(metadata_stream
->fd
, metadata_struct
->payload
,
1560 if (size_ret
< payload_size
) {
1561 ERR("Relay error writing metadata on file");
1566 ret
= write_padding_to_file(metadata_stream
->fd
,
1567 be32toh(metadata_struct
->padding_size
));
1572 ctf_trace
= ctf_trace_find_by_path(session
->ctf_traces_ht
,
1573 metadata_stream
->path_name
);
1575 ctf_trace
->metadata_received
+=
1576 payload_size
+ be32toh(metadata_struct
->padding_size
);
1578 DBG2("Relay metadata written");
1587 * relay_send_version: send relayd version number
1590 int relay_send_version(struct lttcomm_relayd_hdr
*recv_hdr
,
1591 struct relay_connection
*conn
)
1594 struct lttcomm_relayd_version reply
, msg
;
1598 conn
->version_check_done
= 1;
1600 /* Get version from the other side. */
1601 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &msg
, sizeof(msg
), 0);
1602 if (ret
< 0 || ret
!= sizeof(msg
)) {
1604 /* Orderly shutdown. Not necessary to print an error. */
1605 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1607 ERR("Relay failed to receive the version values.");
1613 memset(&reply
, 0, sizeof(reply
));
1614 reply
.major
= RELAYD_VERSION_COMM_MAJOR
;
1615 reply
.minor
= RELAYD_VERSION_COMM_MINOR
;
1617 /* Major versions must be the same */
1618 if (reply
.major
!= be32toh(msg
.major
)) {
1619 DBG("Incompatible major versions (%u vs %u), deleting session",
1620 reply
.major
, be32toh(msg
.major
));
1621 destroy_session(conn
->session
, conn
->sessions_ht
);
1626 conn
->major
= reply
.major
;
1627 /* We adapt to the lowest compatible version */
1628 if (reply
.minor
<= be32toh(msg
.minor
)) {
1629 conn
->minor
= reply
.minor
;
1631 conn
->minor
= be32toh(msg
.minor
);
1634 reply
.major
= htobe32(reply
.major
);
1635 reply
.minor
= htobe32(reply
.minor
);
1636 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
,
1637 sizeof(struct lttcomm_relayd_version
), 0);
1639 ERR("Relay sending version");
1642 DBG("Version check done using protocol %u.%u", conn
->major
,
1650 * Check for data pending for a given stream id from the session daemon.
1653 int relay_data_pending(struct lttcomm_relayd_hdr
*recv_hdr
,
1654 struct relay_connection
*conn
)
1656 struct relay_session
*session
= conn
->session
;
1657 struct lttcomm_relayd_data_pending msg
;
1658 struct lttcomm_relayd_generic_reply reply
;
1659 struct relay_stream
*stream
;
1661 uint64_t last_net_seq_num
, stream_id
;
1663 DBG("Data pending command received");
1665 if (!session
|| conn
->version_check_done
== 0) {
1666 ERR("Trying to check for data before version check");
1668 goto end_no_session
;
1671 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &msg
, sizeof(msg
), 0);
1672 if (ret
< sizeof(msg
)) {
1674 /* Orderly shutdown. Not necessary to print an error. */
1675 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1677 ERR("Relay didn't receive valid data_pending struct size : %d",
1681 goto end_no_session
;
1684 stream_id
= be64toh(msg
.stream_id
);
1685 last_net_seq_num
= be64toh(msg
.last_net_seq_num
);
1688 stream
= stream_find_by_id(relay_streams_ht
, stream_id
);
1689 if (stream
== NULL
) {
1694 DBG("Data pending for stream id %" PRIu64
" prev_seq %" PRIu64
1695 " and last_seq %" PRIu64
, stream_id
, stream
->prev_seq
,
1698 /* Avoid wrapping issue */
1699 if (((int64_t) (stream
->prev_seq
- last_net_seq_num
)) >= 0) {
1700 /* Data has in fact been written and is NOT pending */
1703 /* Data still being streamed thus pending */
1707 /* Pending check is now done. */
1708 stream
->data_pending_check_done
= 1;
1713 memset(&reply
, 0, sizeof(reply
));
1714 reply
.ret_code
= htobe32(ret
);
1715 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
1717 ERR("Relay data pending ret code failed");
1725 * Wait for the control socket to reach a quiescent state.
1727 * Note that for now, when receiving this command from the session daemon, this
1728 * means that every subsequent commands or data received on the control socket
1729 * has been handled. So, this is why we simply return OK here.
1732 int relay_quiescent_control(struct lttcomm_relayd_hdr
*recv_hdr
,
1733 struct relay_connection
*conn
)
1737 struct relay_stream
*stream
;
1738 struct lttng_ht_iter iter
;
1739 struct lttcomm_relayd_quiescent_control msg
;
1740 struct lttcomm_relayd_generic_reply reply
;
1742 DBG("Checking quiescent state on control socket");
1744 if (!conn
->session
|| conn
->version_check_done
== 0) {
1745 ERR("Trying to check for data before version check");
1747 goto end_no_session
;
1750 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &msg
, sizeof(msg
), 0);
1751 if (ret
< sizeof(msg
)) {
1753 /* Orderly shutdown. Not necessary to print an error. */
1754 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1756 ERR("Relay didn't receive valid begin data_pending struct size: %d",
1760 goto end_no_session
;
1763 stream_id
= be64toh(msg
.stream_id
);
1766 cds_lfht_for_each_entry(relay_streams_ht
->ht
, &iter
.iter
, stream
,
1768 if (stream
->stream_handle
== stream_id
) {
1769 stream
->data_pending_check_done
= 1;
1770 DBG("Relay quiescent control pending flag set to %" PRIu64
,
1777 memset(&reply
, 0, sizeof(reply
));
1778 reply
.ret_code
= htobe32(LTTNG_OK
);
1779 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
1781 ERR("Relay data quiescent control ret code failed");
1789 * Initialize a data pending command. This means that a client is about to ask
1790 * for data pending for each stream he/she holds. Simply iterate over all
1791 * streams of a session and set the data_pending_check_done flag.
1793 * This command returns to the client a LTTNG_OK code.
1796 int relay_begin_data_pending(struct lttcomm_relayd_hdr
*recv_hdr
,
1797 struct relay_connection
*conn
)
1800 struct lttng_ht_iter iter
;
1801 struct lttcomm_relayd_begin_data_pending msg
;
1802 struct lttcomm_relayd_generic_reply reply
;
1803 struct relay_stream
*stream
;
1804 uint64_t session_id
;
1809 DBG("Init streams for data pending");
1811 if (!conn
->session
|| conn
->version_check_done
== 0) {
1812 ERR("Trying to check for data before version check");
1814 goto end_no_session
;
1817 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &msg
, sizeof(msg
), 0);
1818 if (ret
< sizeof(msg
)) {
1820 /* Orderly shutdown. Not necessary to print an error. */
1821 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1823 ERR("Relay didn't receive valid begin data_pending struct size: %d",
1827 goto end_no_session
;
1830 session_id
= be64toh(msg
.session_id
);
1833 * Iterate over all streams to set the begin data pending flag. For now, the
1834 * streams are indexed by stream handle so we have to iterate over all
1835 * streams to find the one associated with the right session_id.
1838 cds_lfht_for_each_entry(relay_streams_ht
->ht
, &iter
.iter
, stream
,
1840 if (stream
->session_id
== session_id
) {
1841 stream
->data_pending_check_done
= 0;
1842 DBG("Set begin data pending flag to stream %" PRIu64
,
1843 stream
->stream_handle
);
1848 memset(&reply
, 0, sizeof(reply
));
1849 /* All good, send back reply. */
1850 reply
.ret_code
= htobe32(LTTNG_OK
);
1852 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
1854 ERR("Relay begin data pending send reply failed");
1862 * End data pending command. This will check, for a given session id, if each
1863 * stream associated with it has its data_pending_check_done flag set. If not,
1864 * this means that the client lost track of the stream but the data is still
1865 * being streamed on our side. In this case, we inform the client that data is
1868 * Return to the client if there is data in flight or not with a ret_code.
1871 int relay_end_data_pending(struct lttcomm_relayd_hdr
*recv_hdr
,
1872 struct relay_connection
*conn
)
1875 struct lttng_ht_iter iter
;
1876 struct lttcomm_relayd_end_data_pending msg
;
1877 struct lttcomm_relayd_generic_reply reply
;
1878 struct relay_stream
*stream
;
1879 uint64_t session_id
;
1880 uint32_t is_data_inflight
= 0;
1885 DBG("End data pending command");
1887 if (!conn
->session
|| conn
->version_check_done
== 0) {
1888 ERR("Trying to check for data before version check");
1890 goto end_no_session
;
1893 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &msg
, sizeof(msg
), 0);
1894 if (ret
< sizeof(msg
)) {
1896 /* Orderly shutdown. Not necessary to print an error. */
1897 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1899 ERR("Relay didn't receive valid end data_pending struct size: %d",
1903 goto end_no_session
;
1906 session_id
= be64toh(msg
.session_id
);
1908 /* Iterate over all streams to see if the begin data pending flag is set. */
1910 cds_lfht_for_each_entry(relay_streams_ht
->ht
, &iter
.iter
, stream
,
1912 if (stream
->session_id
== session_id
&&
1913 !stream
->data_pending_check_done
&& !stream
->terminated_flag
) {
1914 is_data_inflight
= 1;
1915 DBG("Data is still in flight for stream %" PRIu64
,
1916 stream
->stream_handle
);
1922 memset(&reply
, 0, sizeof(reply
));
1923 /* All good, send back reply. */
1924 reply
.ret_code
= htobe32(is_data_inflight
);
1926 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
1928 ERR("Relay end data pending send reply failed");
1936 * Receive an index for a specific stream.
1938 * Return 0 on success else a negative value.
1941 int relay_recv_index(struct lttcomm_relayd_hdr
*recv_hdr
,
1942 struct relay_connection
*conn
)
1944 int ret
, send_ret
, index_created
= 0;
1945 struct relay_session
*session
= conn
->session
;
1946 struct lttcomm_relayd_index index_info
;
1947 struct relay_index
*index
, *wr_index
= NULL
;
1948 struct lttcomm_relayd_generic_reply reply
;
1949 struct relay_stream
*stream
;
1950 uint64_t net_seq_num
;
1954 DBG("Relay receiving index");
1956 if (!session
|| conn
->version_check_done
== 0) {
1957 ERR("Trying to close a stream before version check");
1959 goto end_no_session
;
1962 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &index_info
,
1963 sizeof(index_info
), 0);
1964 if (ret
< sizeof(index_info
)) {
1966 /* Orderly shutdown. Not necessary to print an error. */
1967 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1969 ERR("Relay didn't receive valid index struct size : %d", ret
);
1972 goto end_no_session
;
1975 net_seq_num
= be64toh(index_info
.net_seq_num
);
1978 stream
= stream_find_by_id(relay_streams_ht
,
1979 be64toh(index_info
.relay_stream_id
));
1982 goto end_rcu_unlock
;
1985 /* Live beacon handling */
1986 if (index_info
.packet_size
== 0) {
1987 DBG("Received live beacon for stream %" PRIu64
, stream
->stream_handle
);
1990 * Only flag a stream inactive when it has already received data
1991 * and no indexes are in flight.
1993 if (stream
->total_index_received
> 0 && stream
->indexes_in_flight
== 0) {
1994 stream
->beacon_ts_end
= be64toh(index_info
.timestamp_end
);
1997 goto end_rcu_unlock
;
1999 stream
->beacon_ts_end
= -1ULL;
2002 index
= relay_index_find(stream
->stream_handle
, net_seq_num
);
2004 /* A successful creation will add the object to the HT. */
2005 index
= relay_index_create(stream
->stream_handle
, net_seq_num
);
2007 goto end_rcu_unlock
;
2010 stream
->indexes_in_flight
++;
2013 copy_index_control_data(index
, &index_info
);
2014 if (stream
->ctf_stream_id
== -1ULL) {
2015 stream
->ctf_stream_id
= be64toh(index_info
.stream_id
);
2018 if (index_created
) {
2020 * Try to add the relay index object to the hash table. If an object
2021 * already exist, destroy back the index created, set the data in this
2022 * object and write it on disk.
2024 relay_index_add(index
, &wr_index
);
2026 copy_index_control_data(wr_index
, &index_info
);
2030 /* The index already exists so write it on disk. */
2034 /* Do we have a writable ready index to write on disk. */
2036 ret
= relay_index_write(wr_index
->fd
, wr_index
);
2038 goto end_rcu_unlock
;
2040 stream
->total_index_received
++;
2041 stream
->indexes_in_flight
--;
2042 assert(stream
->indexes_in_flight
>= 0);
2048 memset(&reply
, 0, sizeof(reply
));
2050 reply
.ret_code
= htobe32(LTTNG_ERR_UNK
);
2052 reply
.ret_code
= htobe32(LTTNG_OK
);
2054 send_ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
2056 ERR("Relay sending close index id reply");
2065 * Receive the streams_sent message.
2067 * Return 0 on success else a negative value.
2070 int relay_streams_sent(struct lttcomm_relayd_hdr
*recv_hdr
,
2071 struct relay_connection
*conn
)
2074 struct lttcomm_relayd_generic_reply reply
;
2078 DBG("Relay receiving streams_sent");
2080 if (!conn
->session
|| conn
->version_check_done
== 0) {
2081 ERR("Trying to close a stream before version check");
2083 goto end_no_session
;
2087 * Flag every pending stream in the connection recv list that they are
2088 * ready to be used by the viewer.
2090 set_viewer_ready_flag(conn
);
2093 * Inform the viewer that there are new streams in the session.
2095 if (conn
->session
->viewer_refcount
) {
2096 uatomic_set(&conn
->session
->new_streams
, 1);
2099 memset(&reply
, 0, sizeof(reply
));
2100 reply
.ret_code
= htobe32(LTTNG_OK
);
2101 send_ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
2103 ERR("Relay sending sent_stream reply");
2115 * Process the commands received on the control socket
2118 int relay_process_control(struct lttcomm_relayd_hdr
*recv_hdr
,
2119 struct relay_connection
*conn
)
2123 switch (be32toh(recv_hdr
->cmd
)) {
2124 case RELAYD_CREATE_SESSION
:
2125 ret
= relay_create_session(recv_hdr
, conn
);
2127 case RELAYD_ADD_STREAM
:
2128 ret
= relay_add_stream(recv_hdr
, conn
);
2130 case RELAYD_START_DATA
:
2131 ret
= relay_start(recv_hdr
, conn
);
2133 case RELAYD_SEND_METADATA
:
2134 ret
= relay_recv_metadata(recv_hdr
, conn
);
2136 case RELAYD_VERSION
:
2137 ret
= relay_send_version(recv_hdr
, conn
);
2139 case RELAYD_CLOSE_STREAM
:
2140 ret
= relay_close_stream(recv_hdr
, conn
);
2142 case RELAYD_DATA_PENDING
:
2143 ret
= relay_data_pending(recv_hdr
, conn
);
2145 case RELAYD_QUIESCENT_CONTROL
:
2146 ret
= relay_quiescent_control(recv_hdr
, conn
);
2148 case RELAYD_BEGIN_DATA_PENDING
:
2149 ret
= relay_begin_data_pending(recv_hdr
, conn
);
2151 case RELAYD_END_DATA_PENDING
:
2152 ret
= relay_end_data_pending(recv_hdr
, conn
);
2154 case RELAYD_SEND_INDEX
:
2155 ret
= relay_recv_index(recv_hdr
, conn
);
2157 case RELAYD_STREAMS_SENT
:
2158 ret
= relay_streams_sent(recv_hdr
, conn
);
2160 case RELAYD_UPDATE_SYNC_INFO
:
2162 ERR("Received unknown command (%u)", be32toh(recv_hdr
->cmd
));
2163 relay_unknown_command(conn
);
2173 * Handle index for a data stream.
2175 * RCU read side lock MUST be acquired.
2177 * Return 0 on success else a negative value.
2179 static int handle_index_data(struct relay_stream
*stream
, uint64_t net_seq_num
,
2182 int ret
= 0, index_created
= 0;
2183 uint64_t stream_id
, data_offset
;
2184 struct relay_index
*index
, *wr_index
= NULL
;
2188 stream_id
= stream
->stream_handle
;
2189 /* Get data offset because we are about to update the index. */
2190 data_offset
= htobe64(stream
->tracefile_size_current
);
2193 * Lookup for an existing index for that stream id/sequence number. If on
2194 * exists, the control thread already received the data for it thus we need
2195 * to write it on disk.
2197 index
= relay_index_find(stream_id
, net_seq_num
);
2199 /* A successful creation will add the object to the HT. */
2200 index
= relay_index_create(stream_id
, net_seq_num
);
2206 stream
->indexes_in_flight
++;
2209 if (rotate_index
|| stream
->index_fd
< 0) {
2210 index
->to_close_fd
= stream
->index_fd
;
2211 ret
= index_create_file(stream
->path_name
, stream
->channel_name
,
2212 relayd_uid
, relayd_gid
, stream
->tracefile_size
,
2213 stream
->tracefile_count_current
);
2215 /* This will close the stream's index fd if one. */
2216 relay_index_free_safe(index
);
2219 stream
->index_fd
= ret
;
2221 index
->fd
= stream
->index_fd
;
2222 index
->index_data
.offset
= data_offset
;
2224 if (index_created
) {
2226 * Try to add the relay index object to the hash table. If an object
2227 * already exist, destroy back the index created and set the data.
2229 relay_index_add(index
, &wr_index
);
2231 /* Copy back data from the created index. */
2232 wr_index
->fd
= index
->fd
;
2233 wr_index
->to_close_fd
= index
->to_close_fd
;
2234 wr_index
->index_data
.offset
= data_offset
;
2238 /* The index already exists so write it on disk. */
2242 /* Do we have a writable ready index to write on disk. */
2244 ret
= relay_index_write(wr_index
->fd
, wr_index
);
2248 stream
->total_index_received
++;
2249 stream
->indexes_in_flight
--;
2250 assert(stream
->indexes_in_flight
>= 0);
2258 * relay_process_data: Process the data received on the data socket
2261 int relay_process_data(struct relay_connection
*conn
)
2263 int ret
= 0, rotate_index
= 0;
2265 struct relay_stream
*stream
;
2266 struct lttcomm_relayd_data_hdr data_hdr
;
2268 uint64_t net_seq_num
;
2270 struct relay_session
*session
;
2274 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &data_hdr
,
2275 sizeof(struct lttcomm_relayd_data_hdr
), 0);
2278 /* Orderly shutdown. Not necessary to print an error. */
2279 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
2281 ERR("Unable to receive data header on sock %d", conn
->sock
->fd
);
2287 stream_id
= be64toh(data_hdr
.stream_id
);
2290 stream
= stream_find_by_id(relay_streams_ht
, stream_id
);
2293 goto end_rcu_unlock
;
2296 session
= session_find_by_id(conn
->sessions_ht
, stream
->session_id
);
2299 data_size
= be32toh(data_hdr
.data_size
);
2300 if (data_buffer_size
< data_size
) {
2303 tmp_data_ptr
= realloc(data_buffer
, data_size
);
2304 if (!tmp_data_ptr
) {
2305 ERR("Allocating data buffer");
2308 goto end_rcu_unlock
;
2310 data_buffer
= tmp_data_ptr
;
2311 data_buffer_size
= data_size
;
2313 memset(data_buffer
, 0, data_size
);
2315 net_seq_num
= be64toh(data_hdr
.net_seq_num
);
2317 DBG3("Receiving data of size %u for stream id %" PRIu64
" seqnum %" PRIu64
,
2318 data_size
, stream_id
, net_seq_num
);
2319 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, data_buffer
, data_size
, 0);
2322 /* Orderly shutdown. Not necessary to print an error. */
2323 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
2326 goto end_rcu_unlock
;
2329 /* Check if a rotation is needed. */
2330 if (stream
->tracefile_size
> 0 &&
2331 (stream
->tracefile_size_current
+ data_size
) >
2332 stream
->tracefile_size
) {
2333 struct relay_viewer_stream
*vstream
;
2336 new_id
= (stream
->tracefile_count_current
+ 1) %
2337 stream
->tracefile_count
;
2339 * When we wrap-around back to 0, we start overwriting old
2342 if (!stream
->tracefile_overwrite
&& new_id
== 0) {
2343 stream
->tracefile_overwrite
= 1;
2345 pthread_mutex_lock(&stream
->viewer_stream_rotation_lock
);
2346 if (stream
->tracefile_overwrite
) {
2347 stream
->oldest_tracefile_id
=
2348 (stream
->oldest_tracefile_id
+ 1) %
2349 stream
->tracefile_count
;
2351 vstream
= viewer_stream_find_by_id(stream
->stream_handle
);
2354 * The viewer is reading a file about to be
2355 * overwritten. Close the FDs it is
2356 * currently using and let it handle the fault.
2358 if (vstream
->tracefile_count_current
== new_id
) {
2359 pthread_mutex_lock(&vstream
->overwrite_lock
);
2360 vstream
->abort_flag
= 1;
2361 pthread_mutex_unlock(&vstream
->overwrite_lock
);
2362 DBG("Streaming side setting abort_flag on stream %s_%lu\n",
2363 stream
->channel_name
, new_id
);
2364 } else if (vstream
->tracefile_count_current
==
2365 stream
->tracefile_count_current
) {
2367 * The reader and writer were in the
2368 * same trace file, inform the viewer
2369 * that no new index will ever be added
2372 vstream
->close_write_flag
= 1;
2375 ret
= utils_rotate_stream_file(stream
->path_name
, stream
->channel_name
,
2376 stream
->tracefile_size
, stream
->tracefile_count
,
2377 relayd_uid
, relayd_gid
, stream
->fd
,
2378 &(stream
->tracefile_count_current
), &stream
->fd
);
2379 pthread_mutex_unlock(&stream
->viewer_stream_rotation_lock
);
2381 ERR("Rotating stream output file");
2382 goto end_rcu_unlock
;
2384 /* Reset current size because we just perform a stream rotation. */
2385 stream
->tracefile_size_current
= 0;
2390 * Index are handled in protocol version 2.4 and above. Also, snapshot and
2391 * index are NOT supported.
2393 if (session
->minor
>= 4 && !session
->snapshot
) {
2394 ret
= handle_index_data(stream
, net_seq_num
, rotate_index
);
2396 goto end_rcu_unlock
;
2400 /* Write data to stream output fd. */
2401 size_ret
= lttng_write(stream
->fd
, data_buffer
, data_size
);
2402 if (size_ret
< data_size
) {
2403 ERR("Relay error writing data to file");
2405 goto end_rcu_unlock
;
2408 DBG2("Relay wrote %d bytes to tracefile for stream id %" PRIu64
,
2409 ret
, stream
->stream_handle
);
2411 ret
= write_padding_to_file(stream
->fd
, be32toh(data_hdr
.padding_size
));
2413 goto end_rcu_unlock
;
2415 stream
->tracefile_size_current
+= data_size
+ be32toh(data_hdr
.padding_size
);
2417 stream
->prev_seq
= net_seq_num
;
2419 try_close_stream(session
, stream
);
2428 void cleanup_connection_pollfd(struct lttng_poll_event
*events
, int pollfd
)
2434 (void) lttng_poll_del(events
, pollfd
);
2436 ret
= close(pollfd
);
2438 ERR("Closing pollfd %d", pollfd
);
2442 static void destroy_connection(struct lttng_ht
*relay_connections_ht
,
2443 struct relay_connection
*conn
)
2445 assert(relay_connections_ht
);
2448 connection_delete(relay_connections_ht
, conn
);
2450 /* For the control socket, we try to destroy the session. */
2451 if (conn
->type
== RELAY_CONTROL
&& conn
->session
) {
2452 destroy_session(conn
->session
, conn
->sessions_ht
);
2455 connection_destroy(conn
);
2459 * This thread does the actual work
2462 void *relay_thread_worker(void *data
)
2464 int ret
, err
= -1, last_seen_data_fd
= -1;
2466 struct relay_connection
*conn
;
2467 struct lttng_poll_event events
;
2468 struct lttng_ht
*relay_connections_ht
;
2469 struct lttng_ht_iter iter
;
2470 struct lttcomm_relayd_hdr recv_hdr
;
2471 struct relay_local_data
*relay_ctx
= (struct relay_local_data
*) data
;
2472 struct lttng_ht
*sessions_ht
= relay_ctx
->sessions_ht
;
2473 struct relay_index
*index
;
2475 DBG("[thread] Relay worker started");
2477 rcu_register_thread();
2479 health_register(health_relayd
, HEALTH_RELAYD_TYPE_WORKER
);
2481 if (testpoint(relayd_thread_worker
)) {
2482 goto error_testpoint
;
2485 health_code_update();
2487 /* table of connections indexed on socket */
2488 relay_connections_ht
= lttng_ht_new(0, LTTNG_HT_TYPE_ULONG
);
2489 if (!relay_connections_ht
) {
2490 goto relay_connections_ht_error
;
2493 /* Tables of received indexes indexed by index handle and net_seq_num. */
2494 indexes_ht
= lttng_ht_new(0, LTTNG_HT_TYPE_TWO_U64
);
2496 goto indexes_ht_error
;
2499 ret
= create_thread_poll_set(&events
, 2);
2501 goto error_poll_create
;
2504 ret
= lttng_poll_add(&events
, relay_conn_pipe
[0], LPOLLIN
| LPOLLRDHUP
);
2511 int idx
= -1, i
, seen_control
= 0, last_notdel_data_fd
= -1;
2513 health_code_update();
2515 /* Infinite blocking call, waiting for transmission */
2516 DBG3("Relayd worker thread polling...");
2517 health_poll_entry();
2518 ret
= lttng_poll_wait(&events
, -1);
2522 * Restart interrupted system call.
2524 if (errno
== EINTR
) {
2533 * Process control. The control connection is prioritised so we don't
2534 * starve it with high throughout put tracing data on the data
2537 for (i
= 0; i
< nb_fd
; i
++) {
2538 /* Fetch once the poll data */
2539 uint32_t revents
= LTTNG_POLL_GETEV(&events
, i
);
2540 int pollfd
= LTTNG_POLL_GETFD(&events
, i
);
2542 health_code_update();
2545 /* No activity for this FD (poll implementation). */
2549 /* Thread quit pipe has been closed. Killing thread. */
2550 ret
= check_thread_quit_pipe(pollfd
, revents
);
2556 /* Inspect the relay conn pipe for new connection */
2557 if (pollfd
== relay_conn_pipe
[0]) {
2558 if (revents
& (LPOLLERR
| LPOLLHUP
| LPOLLRDHUP
)) {
2559 ERR("Relay connection pipe error");
2561 } else if (revents
& LPOLLIN
) {
2562 ret
= lttng_read(relay_conn_pipe
[0], &conn
, sizeof(conn
));
2566 conn
->sessions_ht
= sessions_ht
;
2567 connection_init(conn
);
2568 lttng_poll_add(&events
, conn
->sock
->fd
,
2569 LPOLLIN
| LPOLLRDHUP
);
2571 lttng_ht_add_unique_ulong(relay_connections_ht
,
2574 DBG("Connection socket %d added", conn
->sock
->fd
);
2578 conn
= connection_find_by_sock(relay_connections_ht
, pollfd
);
2579 /* If not found, there is a synchronization issue. */
2582 if (revents
& (LPOLLERR
| LPOLLHUP
| LPOLLRDHUP
)) {
2583 cleanup_connection_pollfd(&events
, pollfd
);
2584 destroy_connection(relay_connections_ht
, conn
);
2585 if (last_seen_data_fd
== pollfd
) {
2586 last_seen_data_fd
= last_notdel_data_fd
;
2588 } else if (revents
& LPOLLIN
) {
2589 if (conn
->type
== RELAY_CONTROL
) {
2590 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &recv_hdr
,
2591 sizeof(recv_hdr
), 0);
2593 /* Connection closed */
2594 cleanup_connection_pollfd(&events
, pollfd
);
2595 destroy_connection(relay_connections_ht
, conn
);
2596 DBG("Control connection closed with %d", pollfd
);
2598 ret
= relay_process_control(&recv_hdr
, conn
);
2600 /* Clear the session on error. */
2601 cleanup_connection_pollfd(&events
, pollfd
);
2602 destroy_connection(relay_connections_ht
, conn
);
2603 DBG("Connection closed with %d", pollfd
);
2609 * Flag the last seen data fd not deleted. It will be
2610 * used as the last seen fd if any fd gets deleted in
2613 last_notdel_data_fd
= pollfd
;
2616 ERR("Unknown poll events %u for sock %d", revents
, pollfd
);
2623 * The last loop handled a control request, go back to poll to make
2624 * sure we prioritise the control socket.
2630 if (last_seen_data_fd
>= 0) {
2631 for (i
= 0; i
< nb_fd
; i
++) {
2632 int pollfd
= LTTNG_POLL_GETFD(&events
, i
);
2634 health_code_update();
2636 if (last_seen_data_fd
== pollfd
) {
2643 /* Process data connection. */
2644 for (i
= idx
+ 1; i
< nb_fd
; i
++) {
2645 /* Fetch the poll data. */
2646 uint32_t revents
= LTTNG_POLL_GETEV(&events
, i
);
2647 int pollfd
= LTTNG_POLL_GETFD(&events
, i
);
2649 health_code_update();
2652 /* No activity for this FD (poll implementation). */
2656 /* Skip the command pipe. It's handled in the first loop. */
2657 if (pollfd
== relay_conn_pipe
[0]) {
2662 conn
= connection_find_by_sock(relay_connections_ht
, pollfd
);
2664 /* Skip it. Might be removed before. */
2669 if (revents
& LPOLLIN
) {
2670 if (conn
->type
!= RELAY_DATA
) {
2675 ret
= relay_process_data(conn
);
2676 /* Connection closed */
2678 cleanup_connection_pollfd(&events
, pollfd
);
2679 destroy_connection(relay_connections_ht
, conn
);
2680 DBG("Data connection closed with %d", pollfd
);
2682 * Every goto restart call sets the last seen fd where
2683 * here we don't really care since we gracefully
2684 * continue the loop after the connection is deleted.
2687 /* Keep last seen port. */
2688 last_seen_data_fd
= pollfd
;
2695 last_seen_data_fd
= -1;
2698 /* Normal exit, no error */
2703 lttng_poll_clean(&events
);
2705 /* Cleanup reamaining connection object. */
2707 cds_lfht_for_each_entry(relay_connections_ht
->ht
, &iter
.iter
, conn
,
2709 health_code_update();
2710 destroy_connection(relay_connections_ht
, conn
);
2715 cds_lfht_for_each_entry(indexes_ht
->ht
, &iter
.iter
, index
,
2717 health_code_update();
2718 relay_index_delete(index
);
2719 relay_index_free_safe(index
);
2722 lttng_ht_destroy(indexes_ht
);
2724 lttng_ht_destroy(relay_connections_ht
);
2725 relay_connections_ht_error
:
2726 /* Close relay conn pipes */
2727 utils_close_pipe(relay_conn_pipe
);
2729 DBG("Thread exited with error");
2731 DBG("Worker thread cleanup complete");
2736 ERR("Health error occurred in %s", __func__
);
2738 health_unregister(health_relayd
);
2739 rcu_unregister_thread();
2740 lttng_relay_stop_threads();
2745 * Create the relay command pipe to wake thread_manage_apps.
2746 * Closed in cleanup().
2748 static int create_relay_conn_pipe(void)
2752 ret
= utils_create_pipe_cloexec(relay_conn_pipe
);
2760 int main(int argc
, char **argv
)
2762 int ret
= 0, retval
= 0;
2764 struct relay_local_data
*relay_ctx
= NULL
;
2766 /* Parse arguments */
2768 if (set_options(argc
, argv
)) {
2773 if (set_signal_handler()) {
2778 /* Try to create directory if -o, --output is specified. */
2779 if (opt_output_path
) {
2780 if (*opt_output_path
!= '/') {
2781 ERR("Please specify an absolute path for -o, --output PATH");
2786 ret
= utils_mkdir_recursive(opt_output_path
, S_IRWXU
| S_IRWXG
);
2788 ERR("Unable to create %s", opt_output_path
);
2795 if (opt_daemon
|| opt_background
) {
2798 ret
= lttng_daemonize(&child_ppid
, &recv_child_signal
,
2806 * We are in the child. Make sure all other file
2807 * descriptors are closed, in case we are called with
2808 * more opened file descriptors than the standard ones.
2810 for (i
= 3; i
< sysconf(_SC_OPEN_MAX
); i
++) {
2816 /* Initialize thread health monitoring */
2817 health_relayd
= health_app_create(NR_HEALTH_RELAYD_TYPES
);
2818 if (!health_relayd
) {
2819 PERROR("health_app_create error");
2821 goto exit_health_app_create
;
2824 /* Create thread quit pipe */
2825 if (init_thread_quit_pipe()) {
2827 goto exit_init_data
;
2830 /* We need those values for the file/dir creation. */
2831 relayd_uid
= getuid();
2832 relayd_gid
= getgid();
2834 /* Check if daemon is UID = 0 */
2835 if (relayd_uid
== 0) {
2836 if (control_uri
->port
< 1024 || data_uri
->port
< 1024 || live_uri
->port
< 1024) {
2837 ERR("Need to be root to use ports < 1024");
2839 goto exit_init_data
;
2843 /* Setup the thread apps communication pipe. */
2844 if (create_relay_conn_pipe()) {
2846 goto exit_init_data
;
2849 /* Init relay command queue. */
2850 cds_wfcq_init(&relay_conn_queue
.head
, &relay_conn_queue
.tail
);
2852 /* Set up max poll set size */
2853 lttng_poll_set_max_size();
2855 /* Initialize communication library */
2857 lttcomm_inet_init();
2859 relay_ctx
= zmalloc(sizeof(struct relay_local_data
));
2861 PERROR("relay_ctx");
2863 goto exit_init_data
;
2866 /* tables of sessions indexed by session ID */
2867 relay_ctx
->sessions_ht
= lttng_ht_new(0, LTTNG_HT_TYPE_U64
);
2868 if (!relay_ctx
->sessions_ht
) {
2870 goto exit_init_data
;
2873 /* tables of streams indexed by stream ID */
2874 relay_streams_ht
= lttng_ht_new(0, LTTNG_HT_TYPE_U64
);
2875 if (!relay_streams_ht
) {
2877 goto exit_init_data
;
2880 /* tables of streams indexed by stream ID */
2881 viewer_streams_ht
= lttng_ht_new(0, LTTNG_HT_TYPE_U64
);
2882 if (!viewer_streams_ht
) {
2884 goto exit_init_data
;
2887 ret
= utils_create_pipe(health_quit_pipe
);
2890 goto exit_health_quit_pipe
;
2893 /* Create thread to manage the client socket */
2894 ret
= pthread_create(&health_thread
, NULL
,
2895 thread_manage_health
, (void *) NULL
);
2898 PERROR("pthread_create health");
2900 goto exit_health_thread
;
2903 /* Setup the dispatcher thread */
2904 ret
= pthread_create(&dispatcher_thread
, NULL
,
2905 relay_thread_dispatcher
, (void *) NULL
);
2908 PERROR("pthread_create dispatcher");
2910 goto exit_dispatcher_thread
;
2913 /* Setup the worker thread */
2914 ret
= pthread_create(&worker_thread
, NULL
,
2915 relay_thread_worker
, (void *) relay_ctx
);
2918 PERROR("pthread_create worker");
2920 goto exit_worker_thread
;
2923 /* Setup the listener thread */
2924 ret
= pthread_create(&listener_thread
, NULL
,
2925 relay_thread_listener
, (void *) NULL
);
2928 PERROR("pthread_create listener");
2930 goto exit_listener_thread
;
2933 ret
= relayd_live_create(live_uri
, relay_ctx
);
2935 ERR("Starting live viewer threads");
2941 * This is where we start awaiting program completion (e.g. through
2942 * signal that asks threads to teardown).
2945 ret
= relayd_live_join();
2951 ret
= pthread_join(listener_thread
, &status
);
2954 PERROR("pthread_join listener_thread");
2958 exit_listener_thread
:
2959 ret
= pthread_join(worker_thread
, &status
);
2962 PERROR("pthread_join worker_thread");
2967 ret
= pthread_join(dispatcher_thread
, &status
);
2970 PERROR("pthread_join dispatcher_thread");
2973 exit_dispatcher_thread
:
2975 ret
= pthread_join(health_thread
, &status
);
2978 PERROR("pthread_join health_thread");
2983 utils_close_pipe(health_quit_pipe
);
2984 exit_health_quit_pipe
:
2987 health_app_destroy(health_relayd
);
2988 exit_health_app_create
:
2990 relayd_cleanup(relay_ctx
);