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
);
871 /* Thread quit pipe has been closed. Killing thread. */
872 ret
= check_thread_quit_pipe(pollfd
, revents
);
878 if (revents
& (LPOLLERR
| LPOLLHUP
| LPOLLRDHUP
)) {
879 ERR("socket poll error");
881 } else if (revents
& LPOLLIN
) {
883 * Get allocated in this thread, enqueued to a global queue,
884 * dequeued and freed in the worker thread.
887 struct relay_connection
*new_conn
;
888 struct lttcomm_sock
*newsock
;
890 new_conn
= connection_create();
895 if (pollfd
== data_sock
->fd
) {
896 new_conn
->type
= RELAY_DATA
;
897 newsock
= data_sock
->ops
->accept(data_sock
);
898 DBG("Relay data connection accepted, socket %d",
901 assert(pollfd
== control_sock
->fd
);
902 new_conn
->type
= RELAY_CONTROL
;
903 newsock
= control_sock
->ops
->accept(control_sock
);
904 DBG("Relay control connection accepted, socket %d",
908 PERROR("accepting sock");
909 connection_free(new_conn
);
913 ret
= setsockopt(newsock
->fd
, SOL_SOCKET
, SO_REUSEADDR
, &val
,
916 PERROR("setsockopt inet");
917 lttcomm_destroy_sock(newsock
);
918 connection_free(new_conn
);
921 new_conn
->sock
= newsock
;
923 /* Enqueue request for the dispatcher thread. */
924 cds_wfcq_enqueue(&relay_conn_queue
.head
, &relay_conn_queue
.tail
,
928 * Wake the dispatch queue futex. Implicit memory barrier with
929 * the exchange in cds_wfcq_enqueue.
931 futex_nto1_wake(&relay_conn_queue
.futex
);
940 lttng_poll_clean(&events
);
942 if (data_sock
->fd
>= 0) {
943 ret
= data_sock
->ops
->close(data_sock
);
948 lttcomm_destroy_sock(data_sock
);
950 if (control_sock
->fd
>= 0) {
951 ret
= control_sock
->ops
->close(control_sock
);
956 lttcomm_destroy_sock(control_sock
);
960 ERR("Health error occurred in %s", __func__
);
962 health_unregister(health_relayd
);
963 DBG("Relay listener thread cleanup complete");
964 lttng_relay_stop_threads();
969 * This thread manages the dispatching of the requests to worker threads
972 void *relay_thread_dispatcher(void *data
)
976 struct cds_wfcq_node
*node
;
977 struct relay_connection
*new_conn
= NULL
;
979 DBG("[thread] Relay dispatcher started");
981 health_register(health_relayd
, HEALTH_RELAYD_TYPE_DISPATCHER
);
983 if (testpoint(relayd_thread_dispatcher
)) {
984 goto error_testpoint
;
987 health_code_update();
989 while (!CMM_LOAD_SHARED(dispatch_thread_exit
)) {
990 health_code_update();
992 /* Atomically prepare the queue futex */
993 futex_nto1_prepare(&relay_conn_queue
.futex
);
996 health_code_update();
998 /* Dequeue commands */
999 node
= cds_wfcq_dequeue_blocking(&relay_conn_queue
.head
,
1000 &relay_conn_queue
.tail
);
1002 DBG("Woken up but nothing in the relay command queue");
1003 /* Continue thread execution */
1006 new_conn
= caa_container_of(node
, struct relay_connection
, qnode
);
1008 DBG("Dispatching request waiting on sock %d", new_conn
->sock
->fd
);
1011 * Inform worker thread of the new request. This call is blocking
1012 * so we can be assured that the data will be read at some point in
1013 * time or wait to the end of the world :)
1015 ret
= lttng_write(relay_conn_pipe
[1], &new_conn
, sizeof(new_conn
));
1017 PERROR("write connection pipe");
1018 connection_destroy(new_conn
);
1021 } while (node
!= NULL
);
1023 /* Futex wait on queue. Blocking call on futex() */
1024 health_poll_entry();
1025 futex_nto1_wait(&relay_conn_queue
.futex
);
1029 /* Normal exit, no error */
1036 ERR("Health error occurred in %s", __func__
);
1038 health_unregister(health_relayd
);
1039 DBG("Dispatch thread dying");
1040 lttng_relay_stop_threads();
1044 static void try_close_streams(struct relay_session
*session
)
1046 struct ctf_trace
*ctf_trace
;
1047 struct lttng_ht_iter iter
;
1051 pthread_mutex_lock(&session
->viewer_ready_lock
);
1053 cds_lfht_for_each_entry(session
->ctf_traces_ht
->ht
, &iter
.iter
, ctf_trace
,
1055 struct relay_stream
*stream
;
1057 /* Close streams. */
1058 cds_list_for_each_entry(stream
, &ctf_trace
->stream_list
, trace_list
) {
1059 stream_close(session
, stream
);
1062 ctf_trace
->invalid_flag
= 1;
1063 ctf_trace_try_destroy(session
, ctf_trace
);
1066 pthread_mutex_unlock(&session
->viewer_ready_lock
);
1070 * Try to destroy a session within a connection.
1072 static void destroy_session(struct relay_session
*session
,
1073 struct lttng_ht
*sessions_ht
)
1076 assert(sessions_ht
);
1078 /* Indicate that this session can be destroyed from now on. */
1079 session
->close_flag
= 1;
1081 try_close_streams(session
);
1084 * This will try to delete and destroy the session if no viewer is attached
1085 * to it meaning the refcount is down to zero.
1087 session_try_destroy(sessions_ht
, session
);
1091 * Copy index data from the control port to a given index object.
1093 static void copy_index_control_data(struct relay_index
*index
,
1094 struct lttcomm_relayd_index
*data
)
1100 * The index on disk is encoded in big endian, so we don't need to convert
1101 * the data received on the network. The data_offset value is NEVER
1102 * modified here and is updated by the data thread.
1104 index
->index_data
.packet_size
= data
->packet_size
;
1105 index
->index_data
.content_size
= data
->content_size
;
1106 index
->index_data
.timestamp_begin
= data
->timestamp_begin
;
1107 index
->index_data
.timestamp_end
= data
->timestamp_end
;
1108 index
->index_data
.events_discarded
= data
->events_discarded
;
1109 index
->index_data
.stream_id
= data
->stream_id
;
1113 * Handle the RELAYD_CREATE_SESSION command.
1115 * On success, send back the session id or else return a negative value.
1118 int relay_create_session(struct lttcomm_relayd_hdr
*recv_hdr
,
1119 struct relay_connection
*conn
)
1121 int ret
= 0, send_ret
;
1122 struct relay_session
*session
;
1123 struct lttcomm_relayd_status_session reply
;
1128 memset(&reply
, 0, sizeof(reply
));
1130 session
= session_create();
1135 session
->minor
= conn
->minor
;
1136 session
->major
= conn
->major
;
1137 conn
->session_id
= session
->id
;
1138 conn
->session
= session
;
1140 reply
.session_id
= htobe64(session
->id
);
1142 switch (conn
->minor
) {
1147 case 4: /* LTTng sessiond 2.4 */
1149 ret
= cmd_create_session_2_4(conn
, session
);
1152 lttng_ht_add_unique_u64(conn
->sessions_ht
, &session
->session_n
);
1153 DBG("Created session %" PRIu64
, session
->id
);
1157 reply
.ret_code
= htobe32(LTTNG_ERR_FATAL
);
1159 reply
.ret_code
= htobe32(LTTNG_OK
);
1162 send_ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
1164 ERR("Relayd sending session id");
1172 * When we have received all the streams and the metadata for a channel,
1173 * we make them visible to the viewer threads.
1176 void set_viewer_ready_flag(struct relay_connection
*conn
)
1178 struct relay_stream
*stream
, *tmp_stream
;
1180 pthread_mutex_lock(&conn
->session
->viewer_ready_lock
);
1181 cds_list_for_each_entry_safe(stream
, tmp_stream
, &conn
->recv_head
,
1183 stream
->viewer_ready
= 1;
1184 cds_list_del(&stream
->recv_list
);
1186 pthread_mutex_unlock(&conn
->session
->viewer_ready_lock
);
1191 * Add a recv handle node to the connection recv list with the given stream
1192 * handle. A new node is allocated thus must be freed when the node is deleted
1195 static void queue_stream(struct relay_stream
*stream
,
1196 struct relay_connection
*conn
)
1201 cds_list_add(&stream
->recv_list
, &conn
->recv_head
);
1205 * relay_add_stream: allocate a new stream for a session
1208 int relay_add_stream(struct lttcomm_relayd_hdr
*recv_hdr
,
1209 struct relay_connection
*conn
)
1212 struct relay_session
*session
= conn
->session
;
1213 struct relay_stream
*stream
= NULL
;
1214 struct lttcomm_relayd_status_stream reply
;
1215 struct ctf_trace
*trace
;
1217 if (!session
|| conn
->version_check_done
== 0) {
1218 ERR("Trying to add a stream before version check");
1220 goto end_no_session
;
1223 stream
= zmalloc(sizeof(struct relay_stream
));
1224 if (stream
== NULL
) {
1225 PERROR("relay stream zmalloc");
1227 goto end_no_session
;
1230 switch (conn
->minor
) {
1231 case 1: /* LTTng sessiond 2.1 */
1232 ret
= cmd_recv_stream_2_1(conn
, stream
);
1234 case 2: /* LTTng sessiond 2.2 */
1236 ret
= cmd_recv_stream_2_2(conn
, stream
);
1240 goto err_free_stream
;
1244 stream
->stream_handle
= ++last_relay_stream_id
;
1245 stream
->prev_seq
= -1ULL;
1246 stream
->session_id
= session
->id
;
1247 stream
->index_fd
= -1;
1248 stream
->read_index_fd
= -1;
1249 stream
->ctf_stream_id
= -1ULL;
1250 lttng_ht_node_init_u64(&stream
->node
, stream
->stream_handle
);
1251 pthread_mutex_init(&stream
->lock
, NULL
);
1253 ret
= utils_mkdir_recursive(stream
->path_name
, S_IRWXU
| S_IRWXG
);
1255 ERR("relay creating output directory");
1260 * No need to use run_as API here because whatever we receives, the relayd
1261 * uses its own credentials for the stream files.
1263 ret
= utils_create_stream_file(stream
->path_name
, stream
->channel_name
,
1264 stream
->tracefile_size
, 0, relayd_uid
, relayd_gid
, NULL
);
1266 ERR("Create output file");
1270 if (stream
->tracefile_size
) {
1271 DBG("Tracefile %s/%s_0 created", stream
->path_name
, stream
->channel_name
);
1273 DBG("Tracefile %s/%s created", stream
->path_name
, stream
->channel_name
);
1276 trace
= ctf_trace_find_by_path(session
->ctf_traces_ht
, stream
->path_name
);
1278 trace
= ctf_trace_create(stream
->path_name
);
1283 ctf_trace_add(session
->ctf_traces_ht
, trace
);
1285 ctf_trace_get_ref(trace
);
1287 if (!strncmp(stream
->channel_name
, DEFAULT_METADATA_NAME
, NAME_MAX
)) {
1288 stream
->metadata_flag
= 1;
1289 /* Assign quick reference to the metadata stream in the trace. */
1290 trace
->metadata_stream
= stream
;
1294 * Add the stream in the recv list of the connection. Once the end stream
1295 * message is received, this list is emptied and streams are set with the
1296 * viewer ready flag.
1298 queue_stream(stream
, conn
);
1301 * Both in the ctf_trace object and the global stream ht since the data
1302 * side of the relayd does not have the concept of session.
1304 lttng_ht_add_unique_u64(relay_streams_ht
, &stream
->node
);
1305 cds_list_add_tail(&stream
->trace_list
, &trace
->stream_list
);
1307 session
->stream_count
++;
1309 DBG("Relay new stream added %s with ID %" PRIu64
, stream
->channel_name
,
1310 stream
->stream_handle
);
1313 memset(&reply
, 0, sizeof(reply
));
1314 reply
.handle
= htobe64(stream
->stream_handle
);
1315 /* send the session id to the client or a negative return code on error */
1317 reply
.ret_code
= htobe32(LTTNG_ERR_UNK
);
1318 /* stream was not properly added to the ht, so free it */
1321 reply
.ret_code
= htobe32(LTTNG_OK
);
1324 send_ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
,
1325 sizeof(struct lttcomm_relayd_status_stream
), 0);
1327 ERR("Relay sending stream id");
1336 free(stream
->path_name
);
1337 free(stream
->channel_name
);
1343 * relay_close_stream: close a specific stream
1346 int relay_close_stream(struct lttcomm_relayd_hdr
*recv_hdr
,
1347 struct relay_connection
*conn
)
1350 struct relay_session
*session
= conn
->session
;
1351 struct lttcomm_relayd_close_stream stream_info
;
1352 struct lttcomm_relayd_generic_reply reply
;
1353 struct relay_stream
*stream
;
1355 DBG("Close stream received");
1357 if (!session
|| conn
->version_check_done
== 0) {
1358 ERR("Trying to close a stream before version check");
1360 goto end_no_session
;
1363 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &stream_info
,
1364 sizeof(struct lttcomm_relayd_close_stream
), 0);
1365 if (ret
< sizeof(struct lttcomm_relayd_close_stream
)) {
1367 /* Orderly shutdown. Not necessary to print an error. */
1368 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1370 ERR("Relay didn't receive valid add_stream struct size : %d", ret
);
1373 goto end_no_session
;
1377 stream
= stream_find_by_id(relay_streams_ht
,
1378 be64toh(stream_info
.stream_id
));
1384 stream
->last_net_seq_num
= be64toh(stream_info
.last_net_seq_num
);
1385 stream
->close_flag
= 1;
1386 session
->stream_count
--;
1388 /* Check if we can close it or else the data will do it. */
1389 try_close_stream(session
, stream
);
1394 memset(&reply
, 0, sizeof(reply
));
1396 reply
.ret_code
= htobe32(LTTNG_ERR_UNK
);
1398 reply
.ret_code
= htobe32(LTTNG_OK
);
1400 send_ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
,
1401 sizeof(struct lttcomm_relayd_generic_reply
), 0);
1403 ERR("Relay sending stream id");
1412 * relay_unknown_command: send -1 if received unknown command
1415 void relay_unknown_command(struct relay_connection
*conn
)
1417 struct lttcomm_relayd_generic_reply reply
;
1420 memset(&reply
, 0, sizeof(reply
));
1421 reply
.ret_code
= htobe32(LTTNG_ERR_UNK
);
1422 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
,
1423 sizeof(struct lttcomm_relayd_generic_reply
), 0);
1425 ERR("Relay sending unknown command");
1430 * relay_start: send an acknowledgment to the client to tell if we are
1431 * ready to receive data. We are ready if a session is established.
1434 int relay_start(struct lttcomm_relayd_hdr
*recv_hdr
,
1435 struct relay_connection
*conn
)
1437 int ret
= htobe32(LTTNG_OK
);
1438 struct lttcomm_relayd_generic_reply reply
;
1439 struct relay_session
*session
= conn
->session
;
1442 DBG("Trying to start the streaming without a session established");
1443 ret
= htobe32(LTTNG_ERR_UNK
);
1446 memset(&reply
, 0, sizeof(reply
));
1447 reply
.ret_code
= ret
;
1448 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
,
1449 sizeof(struct lttcomm_relayd_generic_reply
), 0);
1451 ERR("Relay sending start ack");
1458 * Append padding to the file pointed by the file descriptor fd.
1460 static int write_padding_to_file(int fd
, uint32_t size
)
1469 zeros
= zmalloc(size
);
1470 if (zeros
== NULL
) {
1471 PERROR("zmalloc zeros for padding");
1476 ret
= lttng_write(fd
, zeros
, size
);
1478 PERROR("write padding to file");
1488 * relay_recv_metadata: receive the metada for the session.
1491 int relay_recv_metadata(struct lttcomm_relayd_hdr
*recv_hdr
,
1492 struct relay_connection
*conn
)
1494 int ret
= htobe32(LTTNG_OK
);
1496 struct relay_session
*session
= conn
->session
;
1497 struct lttcomm_relayd_metadata_payload
*metadata_struct
;
1498 struct relay_stream
*metadata_stream
;
1499 uint64_t data_size
, payload_size
;
1500 struct ctf_trace
*ctf_trace
;
1503 ERR("Metadata sent before version check");
1508 data_size
= payload_size
= be64toh(recv_hdr
->data_size
);
1509 if (data_size
< sizeof(struct lttcomm_relayd_metadata_payload
)) {
1510 ERR("Incorrect data size");
1514 payload_size
-= sizeof(struct lttcomm_relayd_metadata_payload
);
1516 if (data_buffer_size
< data_size
) {
1517 /* In case the realloc fails, we can free the memory */
1520 tmp_data_ptr
= realloc(data_buffer
, data_size
);
1521 if (!tmp_data_ptr
) {
1522 ERR("Allocating data buffer");
1527 data_buffer
= tmp_data_ptr
;
1528 data_buffer_size
= data_size
;
1530 memset(data_buffer
, 0, data_size
);
1531 DBG2("Relay receiving metadata, waiting for %" PRIu64
" bytes", data_size
);
1532 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, data_buffer
, data_size
, 0);
1533 if (ret
< 0 || ret
!= data_size
) {
1535 /* Orderly shutdown. Not necessary to print an error. */
1536 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1538 ERR("Relay didn't receive the whole metadata");
1543 metadata_struct
= (struct lttcomm_relayd_metadata_payload
*) data_buffer
;
1546 metadata_stream
= stream_find_by_id(relay_streams_ht
,
1547 be64toh(metadata_struct
->stream_id
));
1548 if (!metadata_stream
) {
1553 size_ret
= lttng_write(metadata_stream
->fd
, metadata_struct
->payload
,
1555 if (size_ret
< payload_size
) {
1556 ERR("Relay error writing metadata on file");
1561 ret
= write_padding_to_file(metadata_stream
->fd
,
1562 be32toh(metadata_struct
->padding_size
));
1567 ctf_trace
= ctf_trace_find_by_path(session
->ctf_traces_ht
,
1568 metadata_stream
->path_name
);
1570 ctf_trace
->metadata_received
+=
1571 payload_size
+ be32toh(metadata_struct
->padding_size
);
1573 DBG2("Relay metadata written");
1582 * relay_send_version: send relayd version number
1585 int relay_send_version(struct lttcomm_relayd_hdr
*recv_hdr
,
1586 struct relay_connection
*conn
)
1589 struct lttcomm_relayd_version reply
, msg
;
1593 conn
->version_check_done
= 1;
1595 /* Get version from the other side. */
1596 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &msg
, sizeof(msg
), 0);
1597 if (ret
< 0 || ret
!= sizeof(msg
)) {
1599 /* Orderly shutdown. Not necessary to print an error. */
1600 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1602 ERR("Relay failed to receive the version values.");
1608 memset(&reply
, 0, sizeof(reply
));
1609 reply
.major
= RELAYD_VERSION_COMM_MAJOR
;
1610 reply
.minor
= RELAYD_VERSION_COMM_MINOR
;
1612 /* Major versions must be the same */
1613 if (reply
.major
!= be32toh(msg
.major
)) {
1614 DBG("Incompatible major versions (%u vs %u), deleting session",
1615 reply
.major
, be32toh(msg
.major
));
1616 destroy_session(conn
->session
, conn
->sessions_ht
);
1621 conn
->major
= reply
.major
;
1622 /* We adapt to the lowest compatible version */
1623 if (reply
.minor
<= be32toh(msg
.minor
)) {
1624 conn
->minor
= reply
.minor
;
1626 conn
->minor
= be32toh(msg
.minor
);
1629 reply
.major
= htobe32(reply
.major
);
1630 reply
.minor
= htobe32(reply
.minor
);
1631 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
,
1632 sizeof(struct lttcomm_relayd_version
), 0);
1634 ERR("Relay sending version");
1637 DBG("Version check done using protocol %u.%u", conn
->major
,
1645 * Check for data pending for a given stream id from the session daemon.
1648 int relay_data_pending(struct lttcomm_relayd_hdr
*recv_hdr
,
1649 struct relay_connection
*conn
)
1651 struct relay_session
*session
= conn
->session
;
1652 struct lttcomm_relayd_data_pending msg
;
1653 struct lttcomm_relayd_generic_reply reply
;
1654 struct relay_stream
*stream
;
1656 uint64_t last_net_seq_num
, stream_id
;
1658 DBG("Data pending command received");
1660 if (!session
|| conn
->version_check_done
== 0) {
1661 ERR("Trying to check for data before version check");
1663 goto end_no_session
;
1666 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &msg
, sizeof(msg
), 0);
1667 if (ret
< sizeof(msg
)) {
1669 /* Orderly shutdown. Not necessary to print an error. */
1670 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1672 ERR("Relay didn't receive valid data_pending struct size : %d",
1676 goto end_no_session
;
1679 stream_id
= be64toh(msg
.stream_id
);
1680 last_net_seq_num
= be64toh(msg
.last_net_seq_num
);
1683 stream
= stream_find_by_id(relay_streams_ht
, stream_id
);
1684 if (stream
== NULL
) {
1689 DBG("Data pending for stream id %" PRIu64
" prev_seq %" PRIu64
1690 " and last_seq %" PRIu64
, stream_id
, stream
->prev_seq
,
1693 /* Avoid wrapping issue */
1694 if (((int64_t) (stream
->prev_seq
- last_net_seq_num
)) >= 0) {
1695 /* Data has in fact been written and is NOT pending */
1698 /* Data still being streamed thus pending */
1702 /* Pending check is now done. */
1703 stream
->data_pending_check_done
= 1;
1708 memset(&reply
, 0, sizeof(reply
));
1709 reply
.ret_code
= htobe32(ret
);
1710 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
1712 ERR("Relay data pending ret code failed");
1720 * Wait for the control socket to reach a quiescent state.
1722 * Note that for now, when receiving this command from the session daemon, this
1723 * means that every subsequent commands or data received on the control socket
1724 * has been handled. So, this is why we simply return OK here.
1727 int relay_quiescent_control(struct lttcomm_relayd_hdr
*recv_hdr
,
1728 struct relay_connection
*conn
)
1732 struct relay_stream
*stream
;
1733 struct lttng_ht_iter iter
;
1734 struct lttcomm_relayd_quiescent_control msg
;
1735 struct lttcomm_relayd_generic_reply reply
;
1737 DBG("Checking quiescent state on control socket");
1739 if (!conn
->session
|| conn
->version_check_done
== 0) {
1740 ERR("Trying to check for data before version check");
1742 goto end_no_session
;
1745 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &msg
, sizeof(msg
), 0);
1746 if (ret
< sizeof(msg
)) {
1748 /* Orderly shutdown. Not necessary to print an error. */
1749 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1751 ERR("Relay didn't receive valid begin data_pending struct size: %d",
1755 goto end_no_session
;
1758 stream_id
= be64toh(msg
.stream_id
);
1761 cds_lfht_for_each_entry(relay_streams_ht
->ht
, &iter
.iter
, stream
,
1763 if (stream
->stream_handle
== stream_id
) {
1764 stream
->data_pending_check_done
= 1;
1765 DBG("Relay quiescent control pending flag set to %" PRIu64
,
1772 memset(&reply
, 0, sizeof(reply
));
1773 reply
.ret_code
= htobe32(LTTNG_OK
);
1774 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
1776 ERR("Relay data quiescent control ret code failed");
1784 * Initialize a data pending command. This means that a client is about to ask
1785 * for data pending for each stream he/she holds. Simply iterate over all
1786 * streams of a session and set the data_pending_check_done flag.
1788 * This command returns to the client a LTTNG_OK code.
1791 int relay_begin_data_pending(struct lttcomm_relayd_hdr
*recv_hdr
,
1792 struct relay_connection
*conn
)
1795 struct lttng_ht_iter iter
;
1796 struct lttcomm_relayd_begin_data_pending msg
;
1797 struct lttcomm_relayd_generic_reply reply
;
1798 struct relay_stream
*stream
;
1799 uint64_t session_id
;
1804 DBG("Init streams for data pending");
1806 if (!conn
->session
|| conn
->version_check_done
== 0) {
1807 ERR("Trying to check for data before version check");
1809 goto end_no_session
;
1812 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &msg
, sizeof(msg
), 0);
1813 if (ret
< sizeof(msg
)) {
1815 /* Orderly shutdown. Not necessary to print an error. */
1816 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1818 ERR("Relay didn't receive valid begin data_pending struct size: %d",
1822 goto end_no_session
;
1825 session_id
= be64toh(msg
.session_id
);
1828 * Iterate over all streams to set the begin data pending flag. For now, the
1829 * streams are indexed by stream handle so we have to iterate over all
1830 * streams to find the one associated with the right session_id.
1833 cds_lfht_for_each_entry(relay_streams_ht
->ht
, &iter
.iter
, stream
,
1835 if (stream
->session_id
== session_id
) {
1836 stream
->data_pending_check_done
= 0;
1837 DBG("Set begin data pending flag to stream %" PRIu64
,
1838 stream
->stream_handle
);
1843 memset(&reply
, 0, sizeof(reply
));
1844 /* All good, send back reply. */
1845 reply
.ret_code
= htobe32(LTTNG_OK
);
1847 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
1849 ERR("Relay begin data pending send reply failed");
1857 * End data pending command. This will check, for a given session id, if each
1858 * stream associated with it has its data_pending_check_done flag set. If not,
1859 * this means that the client lost track of the stream but the data is still
1860 * being streamed on our side. In this case, we inform the client that data is
1863 * Return to the client if there is data in flight or not with a ret_code.
1866 int relay_end_data_pending(struct lttcomm_relayd_hdr
*recv_hdr
,
1867 struct relay_connection
*conn
)
1870 struct lttng_ht_iter iter
;
1871 struct lttcomm_relayd_end_data_pending msg
;
1872 struct lttcomm_relayd_generic_reply reply
;
1873 struct relay_stream
*stream
;
1874 uint64_t session_id
;
1875 uint32_t is_data_inflight
= 0;
1880 DBG("End data pending command");
1882 if (!conn
->session
|| conn
->version_check_done
== 0) {
1883 ERR("Trying to check for data before version check");
1885 goto end_no_session
;
1888 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &msg
, sizeof(msg
), 0);
1889 if (ret
< sizeof(msg
)) {
1891 /* Orderly shutdown. Not necessary to print an error. */
1892 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1894 ERR("Relay didn't receive valid end data_pending struct size: %d",
1898 goto end_no_session
;
1901 session_id
= be64toh(msg
.session_id
);
1903 /* Iterate over all streams to see if the begin data pending flag is set. */
1905 cds_lfht_for_each_entry(relay_streams_ht
->ht
, &iter
.iter
, stream
,
1907 if (stream
->session_id
== session_id
&&
1908 !stream
->data_pending_check_done
&& !stream
->terminated_flag
) {
1909 is_data_inflight
= 1;
1910 DBG("Data is still in flight for stream %" PRIu64
,
1911 stream
->stream_handle
);
1917 memset(&reply
, 0, sizeof(reply
));
1918 /* All good, send back reply. */
1919 reply
.ret_code
= htobe32(is_data_inflight
);
1921 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
1923 ERR("Relay end data pending send reply failed");
1931 * Receive an index for a specific stream.
1933 * Return 0 on success else a negative value.
1936 int relay_recv_index(struct lttcomm_relayd_hdr
*recv_hdr
,
1937 struct relay_connection
*conn
)
1939 int ret
, send_ret
, index_created
= 0;
1940 struct relay_session
*session
= conn
->session
;
1941 struct lttcomm_relayd_index index_info
;
1942 struct relay_index
*index
, *wr_index
= NULL
;
1943 struct lttcomm_relayd_generic_reply reply
;
1944 struct relay_stream
*stream
;
1945 uint64_t net_seq_num
;
1949 DBG("Relay receiving index");
1951 if (!session
|| conn
->version_check_done
== 0) {
1952 ERR("Trying to close a stream before version check");
1954 goto end_no_session
;
1957 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &index_info
,
1958 sizeof(index_info
), 0);
1959 if (ret
< sizeof(index_info
)) {
1961 /* Orderly shutdown. Not necessary to print an error. */
1962 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1964 ERR("Relay didn't receive valid index struct size : %d", ret
);
1967 goto end_no_session
;
1970 net_seq_num
= be64toh(index_info
.net_seq_num
);
1973 stream
= stream_find_by_id(relay_streams_ht
,
1974 be64toh(index_info
.relay_stream_id
));
1977 goto end_rcu_unlock
;
1980 /* Live beacon handling */
1981 if (index_info
.packet_size
== 0) {
1982 DBG("Received live beacon for stream %" PRIu64
, stream
->stream_handle
);
1985 * Only flag a stream inactive when it has already received data
1986 * and no indexes are in flight.
1988 if (stream
->total_index_received
> 0 && stream
->indexes_in_flight
== 0) {
1989 stream
->beacon_ts_end
= be64toh(index_info
.timestamp_end
);
1992 goto end_rcu_unlock
;
1994 stream
->beacon_ts_end
= -1ULL;
1997 index
= relay_index_find(stream
->stream_handle
, net_seq_num
);
1999 /* A successful creation will add the object to the HT. */
2000 index
= relay_index_create(stream
->stream_handle
, net_seq_num
);
2002 goto end_rcu_unlock
;
2005 stream
->indexes_in_flight
++;
2008 copy_index_control_data(index
, &index_info
);
2009 if (stream
->ctf_stream_id
== -1ULL) {
2010 stream
->ctf_stream_id
= be64toh(index_info
.stream_id
);
2013 if (index_created
) {
2015 * Try to add the relay index object to the hash table. If an object
2016 * already exist, destroy back the index created, set the data in this
2017 * object and write it on disk.
2019 relay_index_add(index
, &wr_index
);
2021 copy_index_control_data(wr_index
, &index_info
);
2025 /* The index already exists so write it on disk. */
2029 /* Do we have a writable ready index to write on disk. */
2031 ret
= relay_index_write(wr_index
->fd
, wr_index
);
2033 goto end_rcu_unlock
;
2035 stream
->total_index_received
++;
2036 stream
->indexes_in_flight
--;
2037 assert(stream
->indexes_in_flight
>= 0);
2043 memset(&reply
, 0, sizeof(reply
));
2045 reply
.ret_code
= htobe32(LTTNG_ERR_UNK
);
2047 reply
.ret_code
= htobe32(LTTNG_OK
);
2049 send_ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
2051 ERR("Relay sending close index id reply");
2060 * Receive the streams_sent message.
2062 * Return 0 on success else a negative value.
2065 int relay_streams_sent(struct lttcomm_relayd_hdr
*recv_hdr
,
2066 struct relay_connection
*conn
)
2069 struct lttcomm_relayd_generic_reply reply
;
2073 DBG("Relay receiving streams_sent");
2075 if (!conn
->session
|| conn
->version_check_done
== 0) {
2076 ERR("Trying to close a stream before version check");
2078 goto end_no_session
;
2082 * Flag every pending stream in the connection recv list that they are
2083 * ready to be used by the viewer.
2085 set_viewer_ready_flag(conn
);
2088 * Inform the viewer that there are new streams in the session.
2090 if (conn
->session
->viewer_refcount
) {
2091 uatomic_set(&conn
->session
->new_streams
, 1);
2094 memset(&reply
, 0, sizeof(reply
));
2095 reply
.ret_code
= htobe32(LTTNG_OK
);
2096 send_ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
2098 ERR("Relay sending sent_stream reply");
2110 * Process the commands received on the control socket
2113 int relay_process_control(struct lttcomm_relayd_hdr
*recv_hdr
,
2114 struct relay_connection
*conn
)
2118 switch (be32toh(recv_hdr
->cmd
)) {
2119 case RELAYD_CREATE_SESSION
:
2120 ret
= relay_create_session(recv_hdr
, conn
);
2122 case RELAYD_ADD_STREAM
:
2123 ret
= relay_add_stream(recv_hdr
, conn
);
2125 case RELAYD_START_DATA
:
2126 ret
= relay_start(recv_hdr
, conn
);
2128 case RELAYD_SEND_METADATA
:
2129 ret
= relay_recv_metadata(recv_hdr
, conn
);
2131 case RELAYD_VERSION
:
2132 ret
= relay_send_version(recv_hdr
, conn
);
2134 case RELAYD_CLOSE_STREAM
:
2135 ret
= relay_close_stream(recv_hdr
, conn
);
2137 case RELAYD_DATA_PENDING
:
2138 ret
= relay_data_pending(recv_hdr
, conn
);
2140 case RELAYD_QUIESCENT_CONTROL
:
2141 ret
= relay_quiescent_control(recv_hdr
, conn
);
2143 case RELAYD_BEGIN_DATA_PENDING
:
2144 ret
= relay_begin_data_pending(recv_hdr
, conn
);
2146 case RELAYD_END_DATA_PENDING
:
2147 ret
= relay_end_data_pending(recv_hdr
, conn
);
2149 case RELAYD_SEND_INDEX
:
2150 ret
= relay_recv_index(recv_hdr
, conn
);
2152 case RELAYD_STREAMS_SENT
:
2153 ret
= relay_streams_sent(recv_hdr
, conn
);
2155 case RELAYD_UPDATE_SYNC_INFO
:
2157 ERR("Received unknown command (%u)", be32toh(recv_hdr
->cmd
));
2158 relay_unknown_command(conn
);
2168 * Handle index for a data stream.
2170 * RCU read side lock MUST be acquired.
2172 * Return 0 on success else a negative value.
2174 static int handle_index_data(struct relay_stream
*stream
, uint64_t net_seq_num
,
2177 int ret
= 0, index_created
= 0;
2178 uint64_t stream_id
, data_offset
;
2179 struct relay_index
*index
, *wr_index
= NULL
;
2183 stream_id
= stream
->stream_handle
;
2184 /* Get data offset because we are about to update the index. */
2185 data_offset
= htobe64(stream
->tracefile_size_current
);
2188 * Lookup for an existing index for that stream id/sequence number. If on
2189 * exists, the control thread already received the data for it thus we need
2190 * to write it on disk.
2192 index
= relay_index_find(stream_id
, net_seq_num
);
2194 /* A successful creation will add the object to the HT. */
2195 index
= relay_index_create(stream_id
, net_seq_num
);
2201 stream
->indexes_in_flight
++;
2204 if (rotate_index
|| stream
->index_fd
< 0) {
2205 index
->to_close_fd
= stream
->index_fd
;
2206 ret
= index_create_file(stream
->path_name
, stream
->channel_name
,
2207 relayd_uid
, relayd_gid
, stream
->tracefile_size
,
2208 stream
->tracefile_count_current
);
2210 /* This will close the stream's index fd if one. */
2211 relay_index_free_safe(index
);
2214 stream
->index_fd
= ret
;
2216 index
->fd
= stream
->index_fd
;
2217 index
->index_data
.offset
= data_offset
;
2219 if (index_created
) {
2221 * Try to add the relay index object to the hash table. If an object
2222 * already exist, destroy back the index created and set the data.
2224 relay_index_add(index
, &wr_index
);
2226 /* Copy back data from the created index. */
2227 wr_index
->fd
= index
->fd
;
2228 wr_index
->to_close_fd
= index
->to_close_fd
;
2229 wr_index
->index_data
.offset
= data_offset
;
2233 /* The index already exists so write it on disk. */
2237 /* Do we have a writable ready index to write on disk. */
2239 ret
= relay_index_write(wr_index
->fd
, wr_index
);
2243 stream
->total_index_received
++;
2244 stream
->indexes_in_flight
--;
2245 assert(stream
->indexes_in_flight
>= 0);
2253 * relay_process_data: Process the data received on the data socket
2256 int relay_process_data(struct relay_connection
*conn
)
2258 int ret
= 0, rotate_index
= 0;
2260 struct relay_stream
*stream
;
2261 struct lttcomm_relayd_data_hdr data_hdr
;
2263 uint64_t net_seq_num
;
2265 struct relay_session
*session
;
2269 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &data_hdr
,
2270 sizeof(struct lttcomm_relayd_data_hdr
), 0);
2273 /* Orderly shutdown. Not necessary to print an error. */
2274 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
2276 ERR("Unable to receive data header on sock %d", conn
->sock
->fd
);
2282 stream_id
= be64toh(data_hdr
.stream_id
);
2285 stream
= stream_find_by_id(relay_streams_ht
, stream_id
);
2288 goto end_rcu_unlock
;
2291 session
= session_find_by_id(conn
->sessions_ht
, stream
->session_id
);
2294 data_size
= be32toh(data_hdr
.data_size
);
2295 if (data_buffer_size
< data_size
) {
2298 tmp_data_ptr
= realloc(data_buffer
, data_size
);
2299 if (!tmp_data_ptr
) {
2300 ERR("Allocating data buffer");
2303 goto end_rcu_unlock
;
2305 data_buffer
= tmp_data_ptr
;
2306 data_buffer_size
= data_size
;
2308 memset(data_buffer
, 0, data_size
);
2310 net_seq_num
= be64toh(data_hdr
.net_seq_num
);
2312 DBG3("Receiving data of size %u for stream id %" PRIu64
" seqnum %" PRIu64
,
2313 data_size
, stream_id
, net_seq_num
);
2314 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, data_buffer
, data_size
, 0);
2317 /* Orderly shutdown. Not necessary to print an error. */
2318 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
2321 goto end_rcu_unlock
;
2324 /* Check if a rotation is needed. */
2325 if (stream
->tracefile_size
> 0 &&
2326 (stream
->tracefile_size_current
+ data_size
) >
2327 stream
->tracefile_size
) {
2328 struct relay_viewer_stream
*vstream
;
2331 new_id
= (stream
->tracefile_count_current
+ 1) %
2332 stream
->tracefile_count
;
2334 * When we wrap-around back to 0, we start overwriting old
2337 if (!stream
->tracefile_overwrite
&& new_id
== 0) {
2338 stream
->tracefile_overwrite
= 1;
2340 pthread_mutex_lock(&stream
->viewer_stream_rotation_lock
);
2341 if (stream
->tracefile_overwrite
) {
2342 stream
->oldest_tracefile_id
=
2343 (stream
->oldest_tracefile_id
+ 1) %
2344 stream
->tracefile_count
;
2346 vstream
= viewer_stream_find_by_id(stream
->stream_handle
);
2349 * The viewer is reading a file about to be
2350 * overwritten. Close the FDs it is
2351 * currently using and let it handle the fault.
2353 if (vstream
->tracefile_count_current
== new_id
) {
2354 pthread_mutex_lock(&vstream
->overwrite_lock
);
2355 vstream
->abort_flag
= 1;
2356 pthread_mutex_unlock(&vstream
->overwrite_lock
);
2357 DBG("Streaming side setting abort_flag on stream %s_%lu\n",
2358 stream
->channel_name
, new_id
);
2359 } else if (vstream
->tracefile_count_current
==
2360 stream
->tracefile_count_current
) {
2362 * The reader and writer were in the
2363 * same trace file, inform the viewer
2364 * that no new index will ever be added
2367 vstream
->close_write_flag
= 1;
2370 ret
= utils_rotate_stream_file(stream
->path_name
, stream
->channel_name
,
2371 stream
->tracefile_size
, stream
->tracefile_count
,
2372 relayd_uid
, relayd_gid
, stream
->fd
,
2373 &(stream
->tracefile_count_current
), &stream
->fd
);
2374 pthread_mutex_unlock(&stream
->viewer_stream_rotation_lock
);
2376 ERR("Rotating stream output file");
2377 goto end_rcu_unlock
;
2379 /* Reset current size because we just perform a stream rotation. */
2380 stream
->tracefile_size_current
= 0;
2385 * Index are handled in protocol version 2.4 and above. Also, snapshot and
2386 * index are NOT supported.
2388 if (session
->minor
>= 4 && !session
->snapshot
) {
2389 ret
= handle_index_data(stream
, net_seq_num
, rotate_index
);
2391 goto end_rcu_unlock
;
2395 /* Write data to stream output fd. */
2396 size_ret
= lttng_write(stream
->fd
, data_buffer
, data_size
);
2397 if (size_ret
< data_size
) {
2398 ERR("Relay error writing data to file");
2400 goto end_rcu_unlock
;
2403 DBG2("Relay wrote %d bytes to tracefile for stream id %" PRIu64
,
2404 ret
, stream
->stream_handle
);
2406 ret
= write_padding_to_file(stream
->fd
, be32toh(data_hdr
.padding_size
));
2408 goto end_rcu_unlock
;
2410 stream
->tracefile_size_current
+= data_size
+ be32toh(data_hdr
.padding_size
);
2412 stream
->prev_seq
= net_seq_num
;
2414 try_close_stream(session
, stream
);
2423 void cleanup_connection_pollfd(struct lttng_poll_event
*events
, int pollfd
)
2429 (void) lttng_poll_del(events
, pollfd
);
2431 ret
= close(pollfd
);
2433 ERR("Closing pollfd %d", pollfd
);
2437 static void destroy_connection(struct lttng_ht
*relay_connections_ht
,
2438 struct relay_connection
*conn
)
2440 assert(relay_connections_ht
);
2443 connection_delete(relay_connections_ht
, conn
);
2445 /* For the control socket, we try to destroy the session. */
2446 if (conn
->type
== RELAY_CONTROL
&& conn
->session
) {
2447 destroy_session(conn
->session
, conn
->sessions_ht
);
2450 connection_destroy(conn
);
2454 * This thread does the actual work
2457 void *relay_thread_worker(void *data
)
2459 int ret
, err
= -1, last_seen_data_fd
= -1;
2461 struct relay_connection
*conn
;
2462 struct lttng_poll_event events
;
2463 struct lttng_ht
*relay_connections_ht
;
2464 struct lttng_ht_iter iter
;
2465 struct lttcomm_relayd_hdr recv_hdr
;
2466 struct relay_local_data
*relay_ctx
= (struct relay_local_data
*) data
;
2467 struct lttng_ht
*sessions_ht
= relay_ctx
->sessions_ht
;
2468 struct relay_index
*index
;
2470 DBG("[thread] Relay worker started");
2472 rcu_register_thread();
2474 health_register(health_relayd
, HEALTH_RELAYD_TYPE_WORKER
);
2476 if (testpoint(relayd_thread_worker
)) {
2477 goto error_testpoint
;
2480 health_code_update();
2482 /* table of connections indexed on socket */
2483 relay_connections_ht
= lttng_ht_new(0, LTTNG_HT_TYPE_ULONG
);
2484 if (!relay_connections_ht
) {
2485 goto relay_connections_ht_error
;
2488 /* Tables of received indexes indexed by index handle and net_seq_num. */
2489 indexes_ht
= lttng_ht_new(0, LTTNG_HT_TYPE_TWO_U64
);
2491 goto indexes_ht_error
;
2494 ret
= create_thread_poll_set(&events
, 2);
2496 goto error_poll_create
;
2499 ret
= lttng_poll_add(&events
, relay_conn_pipe
[0], LPOLLIN
| LPOLLRDHUP
);
2506 int idx
= -1, i
, seen_control
= 0, last_notdel_data_fd
= -1;
2508 health_code_update();
2510 /* Infinite blocking call, waiting for transmission */
2511 DBG3("Relayd worker thread polling...");
2512 health_poll_entry();
2513 ret
= lttng_poll_wait(&events
, -1);
2517 * Restart interrupted system call.
2519 if (errno
== EINTR
) {
2528 * Process control. The control connection is prioritised so we don't
2529 * starve it with high throughout put tracing data on the data
2532 for (i
= 0; i
< nb_fd
; i
++) {
2533 /* Fetch once the poll data */
2534 uint32_t revents
= LTTNG_POLL_GETEV(&events
, i
);
2535 int pollfd
= LTTNG_POLL_GETFD(&events
, i
);
2537 health_code_update();
2539 /* Thread quit pipe has been closed. Killing thread. */
2540 ret
= check_thread_quit_pipe(pollfd
, revents
);
2546 /* Inspect the relay conn pipe for new connection */
2547 if (pollfd
== relay_conn_pipe
[0]) {
2548 if (revents
& (LPOLLERR
| LPOLLHUP
| LPOLLRDHUP
)) {
2549 ERR("Relay connection pipe error");
2551 } else if (revents
& LPOLLIN
) {
2552 ret
= lttng_read(relay_conn_pipe
[0], &conn
, sizeof(conn
));
2556 conn
->sessions_ht
= sessions_ht
;
2557 connection_init(conn
);
2558 lttng_poll_add(&events
, conn
->sock
->fd
,
2559 LPOLLIN
| LPOLLRDHUP
);
2561 lttng_ht_add_unique_ulong(relay_connections_ht
,
2564 DBG("Connection socket %d added", conn
->sock
->fd
);
2568 conn
= connection_find_by_sock(relay_connections_ht
, pollfd
);
2569 /* If not found, there is a synchronization issue. */
2572 if (revents
& (LPOLLERR
| LPOLLHUP
| LPOLLRDHUP
)) {
2573 cleanup_connection_pollfd(&events
, pollfd
);
2574 destroy_connection(relay_connections_ht
, conn
);
2575 if (last_seen_data_fd
== pollfd
) {
2576 last_seen_data_fd
= last_notdel_data_fd
;
2578 } else if (revents
& LPOLLIN
) {
2579 if (conn
->type
== RELAY_CONTROL
) {
2580 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &recv_hdr
,
2581 sizeof(recv_hdr
), 0);
2583 /* Connection closed */
2584 cleanup_connection_pollfd(&events
, pollfd
);
2585 destroy_connection(relay_connections_ht
, conn
);
2586 DBG("Control connection closed with %d", pollfd
);
2588 ret
= relay_process_control(&recv_hdr
, conn
);
2590 /* Clear the session on error. */
2591 cleanup_connection_pollfd(&events
, pollfd
);
2592 destroy_connection(relay_connections_ht
, conn
);
2593 DBG("Connection closed with %d", pollfd
);
2599 * Flag the last seen data fd not deleted. It will be
2600 * used as the last seen fd if any fd gets deleted in
2603 last_notdel_data_fd
= pollfd
;
2606 ERR("Unknown poll events %u for sock %d", revents
, pollfd
);
2613 * The last loop handled a control request, go back to poll to make
2614 * sure we prioritise the control socket.
2620 if (last_seen_data_fd
>= 0) {
2621 for (i
= 0; i
< nb_fd
; i
++) {
2622 int pollfd
= LTTNG_POLL_GETFD(&events
, i
);
2624 health_code_update();
2626 if (last_seen_data_fd
== pollfd
) {
2633 /* Process data connection. */
2634 for (i
= idx
+ 1; i
< nb_fd
; i
++) {
2635 /* Fetch the poll data. */
2636 uint32_t revents
= LTTNG_POLL_GETEV(&events
, i
);
2637 int pollfd
= LTTNG_POLL_GETFD(&events
, i
);
2639 health_code_update();
2641 /* Skip the command pipe. It's handled in the first loop. */
2642 if (pollfd
== relay_conn_pipe
[0]) {
2648 conn
= connection_find_by_sock(relay_connections_ht
, pollfd
);
2650 /* Skip it. Might be removed before. */
2655 if (revents
& LPOLLIN
) {
2656 if (conn
->type
!= RELAY_DATA
) {
2661 ret
= relay_process_data(conn
);
2662 /* Connection closed */
2664 cleanup_connection_pollfd(&events
, pollfd
);
2665 destroy_connection(relay_connections_ht
, conn
);
2666 DBG("Data connection closed with %d", pollfd
);
2668 * Every goto restart call sets the last seen fd where
2669 * here we don't really care since we gracefully
2670 * continue the loop after the connection is deleted.
2673 /* Keep last seen port. */
2674 last_seen_data_fd
= pollfd
;
2682 last_seen_data_fd
= -1;
2685 /* Normal exit, no error */
2690 lttng_poll_clean(&events
);
2692 /* Cleanup reamaining connection object. */
2694 cds_lfht_for_each_entry(relay_connections_ht
->ht
, &iter
.iter
, conn
,
2696 health_code_update();
2697 destroy_connection(relay_connections_ht
, conn
);
2702 cds_lfht_for_each_entry(indexes_ht
->ht
, &iter
.iter
, index
,
2704 health_code_update();
2705 relay_index_delete(index
);
2706 relay_index_free_safe(index
);
2709 lttng_ht_destroy(indexes_ht
);
2711 lttng_ht_destroy(relay_connections_ht
);
2712 relay_connections_ht_error
:
2713 /* Close relay conn pipes */
2714 utils_close_pipe(relay_conn_pipe
);
2716 DBG("Thread exited with error");
2718 DBG("Worker thread cleanup complete");
2723 ERR("Health error occurred in %s", __func__
);
2725 health_unregister(health_relayd
);
2726 rcu_unregister_thread();
2727 lttng_relay_stop_threads();
2732 * Create the relay command pipe to wake thread_manage_apps.
2733 * Closed in cleanup().
2735 static int create_relay_conn_pipe(void)
2739 ret
= utils_create_pipe_cloexec(relay_conn_pipe
);
2747 int main(int argc
, char **argv
)
2749 int ret
= 0, retval
= 0;
2751 struct relay_local_data
*relay_ctx
= NULL
;
2753 /* Parse arguments */
2755 if (set_options(argc
, argv
)) {
2760 if (set_signal_handler()) {
2765 /* Try to create directory if -o, --output is specified. */
2766 if (opt_output_path
) {
2767 if (*opt_output_path
!= '/') {
2768 ERR("Please specify an absolute path for -o, --output PATH");
2773 ret
= utils_mkdir_recursive(opt_output_path
, S_IRWXU
| S_IRWXG
);
2775 ERR("Unable to create %s", opt_output_path
);
2782 if (opt_daemon
|| opt_background
) {
2785 ret
= lttng_daemonize(&child_ppid
, &recv_child_signal
,
2793 * We are in the child. Make sure all other file
2794 * descriptors are closed, in case we are called with
2795 * more opened file descriptors than the standard ones.
2797 for (i
= 3; i
< sysconf(_SC_OPEN_MAX
); i
++) {
2803 /* Initialize thread health monitoring */
2804 health_relayd
= health_app_create(NR_HEALTH_RELAYD_TYPES
);
2805 if (!health_relayd
) {
2806 PERROR("health_app_create error");
2808 goto exit_health_app_create
;
2811 /* Create thread quit pipe */
2812 if (init_thread_quit_pipe()) {
2814 goto exit_init_data
;
2817 /* We need those values for the file/dir creation. */
2818 relayd_uid
= getuid();
2819 relayd_gid
= getgid();
2821 /* Check if daemon is UID = 0 */
2822 if (relayd_uid
== 0) {
2823 if (control_uri
->port
< 1024 || data_uri
->port
< 1024 || live_uri
->port
< 1024) {
2824 ERR("Need to be root to use ports < 1024");
2826 goto exit_init_data
;
2830 /* Setup the thread apps communication pipe. */
2831 if (create_relay_conn_pipe()) {
2833 goto exit_init_data
;
2836 /* Init relay command queue. */
2837 cds_wfcq_init(&relay_conn_queue
.head
, &relay_conn_queue
.tail
);
2839 /* Set up max poll set size */
2840 lttng_poll_set_max_size();
2842 /* Initialize communication library */
2844 lttcomm_inet_init();
2846 relay_ctx
= zmalloc(sizeof(struct relay_local_data
));
2848 PERROR("relay_ctx");
2850 goto exit_init_data
;
2853 /* tables of sessions indexed by session ID */
2854 relay_ctx
->sessions_ht
= lttng_ht_new(0, LTTNG_HT_TYPE_U64
);
2855 if (!relay_ctx
->sessions_ht
) {
2857 goto exit_init_data
;
2860 /* tables of streams indexed by stream ID */
2861 relay_streams_ht
= lttng_ht_new(0, LTTNG_HT_TYPE_U64
);
2862 if (!relay_streams_ht
) {
2864 goto exit_init_data
;
2867 /* tables of streams indexed by stream ID */
2868 viewer_streams_ht
= lttng_ht_new(0, LTTNG_HT_TYPE_U64
);
2869 if (!viewer_streams_ht
) {
2871 goto exit_init_data
;
2874 ret
= utils_create_pipe(health_quit_pipe
);
2877 goto exit_health_quit_pipe
;
2880 /* Create thread to manage the client socket */
2881 ret
= pthread_create(&health_thread
, NULL
,
2882 thread_manage_health
, (void *) NULL
);
2885 PERROR("pthread_create health");
2887 goto exit_health_thread
;
2890 /* Setup the dispatcher thread */
2891 ret
= pthread_create(&dispatcher_thread
, NULL
,
2892 relay_thread_dispatcher
, (void *) NULL
);
2895 PERROR("pthread_create dispatcher");
2897 goto exit_dispatcher_thread
;
2900 /* Setup the worker thread */
2901 ret
= pthread_create(&worker_thread
, NULL
,
2902 relay_thread_worker
, (void *) relay_ctx
);
2905 PERROR("pthread_create worker");
2907 goto exit_worker_thread
;
2910 /* Setup the listener thread */
2911 ret
= pthread_create(&listener_thread
, NULL
,
2912 relay_thread_listener
, (void *) NULL
);
2915 PERROR("pthread_create listener");
2917 goto exit_listener_thread
;
2920 ret
= relayd_live_create(live_uri
, relay_ctx
);
2922 ERR("Starting live viewer threads");
2928 * This is where we start awaiting program completion (e.g. through
2929 * signal that asks threads to teardown).
2932 ret
= relayd_live_join();
2938 ret
= pthread_join(listener_thread
, &status
);
2941 PERROR("pthread_join listener_thread");
2945 exit_listener_thread
:
2946 ret
= pthread_join(worker_thread
, &status
);
2949 PERROR("pthread_join worker_thread");
2954 ret
= pthread_join(dispatcher_thread
, &status
);
2957 PERROR("pthread_join dispatcher_thread");
2960 exit_dispatcher_thread
:
2962 ret
= pthread_join(health_thread
, &status
);
2965 PERROR("pthread_join health_thread");
2970 utils_close_pipe(health_quit_pipe
);
2971 exit_health_quit_pipe
:
2974 health_app_destroy(health_relayd
);
2975 exit_health_app_create
:
2977 relayd_cleanup(relay_ctx
);