2 * Copyright (C) 2012 - Julien Desfossez <jdesfossez@efficios.com>
3 * David Goulet <dgoulet@efficios.com>
4 * 2013 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License, version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
30 #include <sys/mount.h>
31 #include <sys/resource.h>
32 #include <sys/socket.h>
34 #include <sys/types.h>
37 #include <urcu/futex.h>
38 #include <urcu/uatomic.h>
43 #include <lttng/lttng.h>
44 #include <common/common.h>
45 #include <common/compat/poll.h>
46 #include <common/compat/socket.h>
47 #include <common/defaults.h>
48 #include <common/futex.h>
49 #include <common/sessiond-comm/sessiond-comm.h>
50 #include <common/sessiond-comm/inet.h>
51 #include <common/sessiond-comm/relayd.h>
52 #include <common/uri.h>
53 #include <common/utils.h>
54 #include <common/config/config.h>
57 #include "ctf-trace.h"
60 #include "lttng-relayd.h"
62 #include "health-relayd.h"
64 /* command line options */
65 char *opt_output_path
;
66 static int opt_daemon
;
67 static struct lttng_uri
*control_uri
;
68 static struct lttng_uri
*data_uri
;
69 static struct lttng_uri
*live_uri
;
73 const char *tracing_group_name
= DEFAULT_TRACING_GROUP
;
74 static int tracing_group_name_override
;
76 const char * const config_section_name
= "relayd";
79 * Quit pipe for all threads. This permits a single cancellation point
80 * for all threads when receiving an event on the pipe.
82 static int thread_quit_pipe
[2] = { -1, -1 };
85 * This pipe is used to inform the worker thread that a command is queued and
86 * ready to be processed.
88 static int relay_cmd_pipe
[2] = { -1, -1 };
90 /* Shared between threads */
91 static int dispatch_thread_exit
;
93 static pthread_t listener_thread
;
94 static pthread_t dispatcher_thread
;
95 static pthread_t worker_thread
;
96 static pthread_t health_thread
;
98 static uint64_t last_relay_stream_id
;
99 static uint64_t last_relay_session_id
;
102 * Relay command queue.
104 * The relay_thread_listener and relay_thread_dispatcher communicate with this
107 static struct relay_cmd_queue relay_cmd_queue
;
109 /* buffer allocated at startup, used to store the trace data */
110 static char *data_buffer
;
111 static unsigned int data_buffer_size
;
113 /* We need those values for the file/dir creation. */
114 static uid_t relayd_uid
;
115 static gid_t relayd_gid
;
117 /* Global relay stream hash table. */
118 struct lttng_ht
*relay_streams_ht
;
120 /* Global relay viewer stream hash table. */
121 struct lttng_ht
*viewer_streams_ht
;
123 /* Global hash table that stores relay index object. */
124 struct lttng_ht
*indexes_ht
;
126 /* Relayd health monitoring */
127 struct health_app
*health_relayd
;
129 static struct option long_options
[] = {
130 { "control-port", 1, 0, 'C', },
131 { "data-port", 1, 0, 'D', },
132 { "live-port", 1, 0, 'L', },
133 { "daemonize", 0, 0, 'd', },
134 { "group", 1, 0, 'g', },
135 { "help", 0, 0, 'h', },
136 { "output", 1, 0, 'o', },
137 { "verbose", 0, 0, 'v', },
138 { "config", 1, 0, 'f' },
142 static const char *config_ignore_options
[] = { "help", "config" };
145 * usage function on stderr
150 fprintf(stderr
, "Usage: %s OPTIONS\n\nOptions:\n", progname
);
151 fprintf(stderr
, " -h, --help Display this usage.\n");
152 fprintf(stderr
, " -d, --daemonize Start as a daemon.\n");
153 fprintf(stderr
, " -C, --control-port URL Control port listening.\n");
154 fprintf(stderr
, " -D, --data-port URL Data port listening.\n");
155 fprintf(stderr
, " -L, --live-port URL Live view port listening.\n");
156 fprintf(stderr
, " -o, --output PATH Output path for traces. Must use an absolute path.\n");
157 fprintf(stderr
, " -v, --verbose Verbose mode. Activate DBG() macro.\n");
158 fprintf(stderr
, " -g, --group NAME Specify the tracing group name. (default: tracing)\n");
159 fprintf(stderr
, " -f --config Load daemon configuration file\n");
163 * Take an option from the getopt output and set it in the right variable to be
166 * Return 0 on success else a negative value.
169 int set_option(int opt
, const char *arg
, const char *optname
)
175 fprintf(stderr
, "option %s", optname
);
177 fprintf(stderr
, " with arg %s\n", arg
);
181 ret
= uri_parse(arg
, &control_uri
);
183 ERR("Invalid control URI specified");
186 if (control_uri
->port
== 0) {
187 control_uri
->port
= DEFAULT_NETWORK_CONTROL_PORT
;
191 ret
= uri_parse(arg
, &data_uri
);
193 ERR("Invalid data URI specified");
196 if (data_uri
->port
== 0) {
197 data_uri
->port
= DEFAULT_NETWORK_DATA_PORT
;
201 ret
= uri_parse(arg
, &live_uri
);
203 ERR("Invalid live URI specified");
206 if (live_uri
->port
== 0) {
207 live_uri
->port
= DEFAULT_NETWORK_VIEWER_PORT
;
214 tracing_group_name
= strdup(arg
);
215 tracing_group_name_override
= 1;
221 ret
= asprintf(&opt_output_path
, "%s", arg
);
224 PERROR("asprintf opt_output_path");
229 /* Verbose level can increase using multiple -v */
231 lttng_opt_verbose
= config_parse_value(arg
);
233 lttng_opt_verbose
+= 1;
237 /* Unknown option or other error.
238 * Error is printed by getopt, just return */
251 * config_entry_handler_cb used to handle options read from a config file.
252 * See config_entry_handler_cb comment in common/config/config.h for the
253 * return value conventions.
256 int config_entry_handler(const struct config_entry
*entry
, void *unused
)
260 if (!entry
|| !entry
->name
|| !entry
->value
) {
265 /* Check if the option is to be ignored */
266 for (i
= 0; i
< sizeof(config_ignore_options
) / sizeof(char *); i
++) {
267 if (!strcmp(entry
->name
, config_ignore_options
[i
])) {
272 for (i
= 0; i
< (sizeof(long_options
) / sizeof(struct option
)) - 1; i
++) {
273 /* Ignore if entry name is not fully matched. */
274 if (strcmp(entry
->name
, long_options
[i
].name
)) {
279 * If the option takes no argument on the command line, we have to
280 * check if the value is "true". We support non-zero numeric values,
283 if (!long_options
[i
].has_arg
) {
284 ret
= config_parse_value(entry
->value
);
287 WARN("Invalid configuration value \"%s\" for option %s",
288 entry
->value
, entry
->name
);
290 /* False, skip boolean config option. */
295 ret
= set_option(long_options
[i
].val
, entry
->value
, entry
->name
);
299 WARN("Unrecognized option \"%s\" in daemon configuration file.",
307 int set_options(int argc
, char **argv
)
309 int c
, ret
= 0, option_index
= 0;
310 int orig_optopt
= optopt
, orig_optind
= optind
;
311 char *default_address
, *optstring
;
312 const char *config_path
= NULL
;
314 optstring
= utils_generate_optstring(long_options
,
315 sizeof(long_options
) / sizeof(struct option
));
321 /* Check for the --config option */
323 while ((c
= getopt_long(argc
, argv
, optstring
, long_options
,
324 &option_index
)) != -1) {
328 } else if (c
!= 'f') {
332 config_path
= utils_expand_path(optarg
);
334 ERR("Failed to resolve path: %s", optarg
);
338 ret
= config_get_section_entries(config_path
, config_section_name
,
339 config_entry_handler
, NULL
);
342 ERR("Invalid configuration option at line %i", ret
);
348 /* Reset getopt's global state */
349 optopt
= orig_optopt
;
350 optind
= orig_optind
;
352 c
= getopt_long(argc
, argv
, optstring
, long_options
, &option_index
);
357 ret
= set_option(c
, optarg
, long_options
[option_index
].name
);
363 /* assign default values */
364 if (control_uri
== NULL
) {
365 ret
= asprintf(&default_address
, "tcp://0.0.0.0:%d",
366 DEFAULT_NETWORK_CONTROL_PORT
);
368 PERROR("asprintf default data address");
372 ret
= uri_parse(default_address
, &control_uri
);
373 free(default_address
);
375 ERR("Invalid control URI specified");
379 if (data_uri
== NULL
) {
380 ret
= asprintf(&default_address
, "tcp://0.0.0.0:%d",
381 DEFAULT_NETWORK_DATA_PORT
);
383 PERROR("asprintf default data address");
387 ret
= uri_parse(default_address
, &data_uri
);
388 free(default_address
);
390 ERR("Invalid data URI specified");
394 if (live_uri
== NULL
) {
395 ret
= asprintf(&default_address
, "tcp://0.0.0.0:%d",
396 DEFAULT_NETWORK_VIEWER_PORT
);
398 PERROR("asprintf default viewer control address");
402 ret
= uri_parse(default_address
, &live_uri
);
403 free(default_address
);
405 ERR("Invalid viewer control URI specified");
423 /* free the dynamically allocated opt_output_path */
424 free(opt_output_path
);
426 /* Close thread quit pipes */
427 utils_close_pipe(thread_quit_pipe
);
429 uri_free(control_uri
);
431 /* Live URI is freed in the live thread. */
433 if (tracing_group_name_override
) {
434 free((void *) tracing_group_name
);
439 * Write to writable pipe used to notify a thread.
442 int notify_thread_pipe(int wpipe
)
446 ret
= lttng_write(wpipe
, "!", 1);
448 PERROR("write poll pipe");
454 static void notify_health_quit_pipe(int *pipe
)
458 ret
= lttng_write(pipe
[1], "4", 1);
460 PERROR("write relay health quit");
465 * Stop all threads by closing the thread quit pipe.
468 void stop_threads(void)
472 /* Stopping all threads */
473 DBG("Terminating all threads");
474 ret
= notify_thread_pipe(thread_quit_pipe
[1]);
476 ERR("write error on thread quit pipe");
479 notify_health_quit_pipe(health_quit_pipe
);
481 /* Dispatch thread */
482 CMM_STORE_SHARED(dispatch_thread_exit
, 1);
483 futex_nto1_wake(&relay_cmd_queue
.futex
);
487 * Signal handler for the daemon
489 * Simply stop all worker threads, leaving main() return gracefully after
490 * joining all threads and calling cleanup().
493 void sighandler(int sig
)
497 DBG("SIGPIPE caught");
500 DBG("SIGINT caught");
504 DBG("SIGTERM caught");
513 * Setup signal handler for :
514 * SIGINT, SIGTERM, SIGPIPE
517 int set_signal_handler(void)
523 if ((ret
= sigemptyset(&sigset
)) < 0) {
524 PERROR("sigemptyset");
528 sa
.sa_handler
= sighandler
;
531 if ((ret
= sigaction(SIGTERM
, &sa
, NULL
)) < 0) {
536 if ((ret
= sigaction(SIGINT
, &sa
, NULL
)) < 0) {
541 if ((ret
= sigaction(SIGPIPE
, &sa
, NULL
)) < 0) {
546 DBG("Signal handler set for SIGTERM, SIGPIPE and SIGINT");
552 * Init thread quit pipe.
554 * Return -1 on error or 0 if all pipes are created.
557 int init_thread_quit_pipe(void)
561 ret
= utils_create_pipe_cloexec(thread_quit_pipe
);
567 * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set.
570 int create_thread_poll_set(struct lttng_poll_event
*events
, int size
)
574 if (events
== NULL
|| size
== 0) {
579 ret
= lttng_poll_create(events
, size
, LTTNG_CLOEXEC
);
585 ret
= lttng_poll_add(events
, thread_quit_pipe
[0], LPOLLIN
);
597 * Check if the thread quit pipe was triggered.
599 * Return 1 if it was triggered else 0;
602 int check_thread_quit_pipe(int fd
, uint32_t events
)
604 if (fd
== thread_quit_pipe
[0] && (events
& LPOLLIN
)) {
612 * Create and init socket from uri.
615 struct lttcomm_sock
*relay_init_sock(struct lttng_uri
*uri
)
618 struct lttcomm_sock
*sock
= NULL
;
620 sock
= lttcomm_alloc_sock_from_uri(uri
);
622 ERR("Allocating socket");
626 ret
= lttcomm_create_sock(sock
);
630 DBG("Listening on sock %d", sock
->fd
);
632 ret
= sock
->ops
->bind(sock
);
637 ret
= sock
->ops
->listen(sock
, -1);
647 lttcomm_destroy_sock(sock
);
653 * Return nonzero if stream needs to be closed.
656 int close_stream_check(struct relay_stream
*stream
)
659 if (stream
->close_flag
&& stream
->prev_seq
== stream
->last_net_seq_num
) {
661 * We are about to close the stream so set the data pending flag to 1
662 * which will make the end data pending command skip the stream which
663 * is now closed and ready. Note that after proceeding to a file close,
664 * the written file is ready for reading.
666 stream
->data_pending_check_done
= 1;
673 * This thread manages the listening for new connections on the network
676 void *relay_thread_listener(void *data
)
678 int i
, ret
, pollfd
, err
= -1;
680 uint32_t revents
, nb_fd
;
681 struct lttng_poll_event events
;
682 struct lttcomm_sock
*control_sock
, *data_sock
;
684 DBG("[thread] Relay listener started");
686 health_register(health_relayd
, HEALTH_RELAYD_TYPE_LISTENER
);
688 health_code_update();
690 control_sock
= relay_init_sock(control_uri
);
692 goto error_sock_control
;
695 data_sock
= relay_init_sock(data_uri
);
697 goto error_sock_relay
;
701 * Pass 3 as size here for the thread quit pipe, control and data socket.
703 ret
= create_thread_poll_set(&events
, 3);
705 goto error_create_poll
;
708 /* Add the control socket */
709 ret
= lttng_poll_add(&events
, control_sock
->fd
, LPOLLIN
| LPOLLRDHUP
);
714 /* Add the data socket */
715 ret
= lttng_poll_add(&events
, data_sock
->fd
, LPOLLIN
| LPOLLRDHUP
);
721 health_code_update();
723 DBG("Listener accepting connections");
727 ret
= lttng_poll_wait(&events
, -1);
731 * Restart interrupted system call.
733 if (errno
== EINTR
) {
741 DBG("Relay new connection received");
742 for (i
= 0; i
< nb_fd
; i
++) {
743 health_code_update();
745 /* Fetch once the poll data */
746 revents
= LTTNG_POLL_GETEV(&events
, i
);
747 pollfd
= LTTNG_POLL_GETFD(&events
, i
);
749 /* Thread quit pipe has been closed. Killing thread. */
750 ret
= check_thread_quit_pipe(pollfd
, revents
);
756 if (revents
& (LPOLLERR
| LPOLLHUP
| LPOLLRDHUP
)) {
757 ERR("socket poll error");
759 } else if (revents
& LPOLLIN
) {
761 * Get allocated in this thread,
762 * enqueued to a global queue, dequeued
763 * and freed in the worker thread.
765 struct relay_command
*relay_cmd
;
766 struct lttcomm_sock
*newsock
;
768 relay_cmd
= zmalloc(sizeof(struct relay_command
));
769 if (relay_cmd
== NULL
) {
770 PERROR("relay command zmalloc");
774 if (pollfd
== data_sock
->fd
) {
775 newsock
= data_sock
->ops
->accept(data_sock
);
777 PERROR("accepting data sock");
781 relay_cmd
->type
= RELAY_DATA
;
782 DBG("Relay data connection accepted, socket %d", newsock
->fd
);
784 assert(pollfd
== control_sock
->fd
);
785 newsock
= control_sock
->ops
->accept(control_sock
);
787 PERROR("accepting control sock");
791 relay_cmd
->type
= RELAY_CONTROL
;
792 DBG("Relay control connection accepted, socket %d", newsock
->fd
);
794 ret
= setsockopt(newsock
->fd
, SOL_SOCKET
, SO_REUSEADDR
,
797 PERROR("setsockopt inet");
798 lttcomm_destroy_sock(newsock
);
802 relay_cmd
->sock
= newsock
;
804 * Lock free enqueue the request.
806 cds_wfq_enqueue(&relay_cmd_queue
.queue
, &relay_cmd
->node
);
809 * Wake the dispatch queue futex. Implicit memory
810 * barrier with the exchange in cds_wfq_enqueue.
812 futex_nto1_wake(&relay_cmd_queue
.futex
);
820 lttng_poll_clean(&events
);
822 if (data_sock
->fd
>= 0) {
823 ret
= data_sock
->ops
->close(data_sock
);
828 lttcomm_destroy_sock(data_sock
);
830 if (control_sock
->fd
>= 0) {
831 ret
= control_sock
->ops
->close(control_sock
);
836 lttcomm_destroy_sock(control_sock
);
840 ERR("Health error occurred in %s", __func__
);
842 health_unregister(health_relayd
);
843 DBG("Relay listener thread cleanup complete");
849 * This thread manages the dispatching of the requests to worker threads
852 void *relay_thread_dispatcher(void *data
)
856 struct cds_wfq_node
*node
;
857 struct relay_command
*relay_cmd
= NULL
;
859 DBG("[thread] Relay dispatcher started");
861 health_register(health_relayd
, HEALTH_RELAYD_TYPE_DISPATCHER
);
863 health_code_update();
865 while (!CMM_LOAD_SHARED(dispatch_thread_exit
)) {
866 health_code_update();
868 /* Atomically prepare the queue futex */
869 futex_nto1_prepare(&relay_cmd_queue
.futex
);
872 health_code_update();
874 /* Dequeue commands */
875 node
= cds_wfq_dequeue_blocking(&relay_cmd_queue
.queue
);
877 DBG("Woken up but nothing in the relay command queue");
878 /* Continue thread execution */
882 relay_cmd
= caa_container_of(node
, struct relay_command
, node
);
883 DBG("Dispatching request waiting on sock %d", relay_cmd
->sock
->fd
);
886 * Inform worker thread of the new request. This
887 * call is blocking so we can be assured that the data will be read
888 * at some point in time or wait to the end of the world :)
890 ret
= lttng_write(relay_cmd_pipe
[1], relay_cmd
,
891 sizeof(struct relay_command
));
893 if (ret
< sizeof(struct relay_command
)) {
894 PERROR("write cmd pipe");
897 } while (node
!= NULL
);
899 /* Futex wait on queue. Blocking call on futex() */
901 futex_nto1_wait(&relay_cmd_queue
.futex
);
905 /* Normal exit, no error */
911 ERR("Health error occurred in %s", __func__
);
913 health_unregister(health_relayd
);
914 DBG("Dispatch thread dying");
920 * Get stream from stream id.
921 * Need to be called with RCU read-side lock held.
923 struct relay_stream
*relay_stream_find_by_id(uint64_t stream_id
)
925 struct lttng_ht_node_ulong
*node
;
926 struct lttng_ht_iter iter
;
927 struct relay_stream
*ret
;
929 lttng_ht_lookup(relay_streams_ht
,
930 (void *)((unsigned long) stream_id
),
932 node
= lttng_ht_iter_get_node_ulong(&iter
);
934 DBG("Relay stream %" PRIu64
" not found", stream_id
);
939 ret
= caa_container_of(node
, struct relay_stream
, stream_n
);
946 void deferred_free_stream(struct rcu_head
*head
)
948 struct relay_stream
*stream
=
949 caa_container_of(head
, struct relay_stream
, rcu_node
);
951 free(stream
->path_name
);
952 free(stream
->channel_name
);
957 void deferred_free_session(struct rcu_head
*head
)
959 struct relay_session
*session
=
960 caa_container_of(head
, struct relay_session
, rcu_node
);
965 * Close a given stream. The stream is freed using a call RCU.
967 * RCU read side lock MUST be acquired. If NO close_stream_check() was called
968 * BEFORE the stream lock MUST be acquired.
970 static void destroy_stream(struct relay_stream
*stream
)
973 struct relay_viewer_stream
*vstream
;
974 struct lttng_ht_iter iter
;
978 delret
= close(stream
->fd
);
980 PERROR("close stream");
983 if (stream
->index_fd
>= 0) {
984 delret
= close(stream
->index_fd
);
986 PERROR("close stream index_fd");
990 vstream
= live_find_viewer_stream_by_id(stream
->stream_handle
);
993 * Set the last good value into the viewer stream. This is done
994 * right before the stream gets deleted from the hash table. The
995 * lookup failure on the live thread side of a stream indicates
996 * that the viewer stream index received value should be used.
998 pthread_mutex_lock(&stream
->viewer_stream_rotation_lock
);
999 vstream
->total_index_received
= stream
->total_index_received
;
1000 vstream
->tracefile_count_last
= stream
->tracefile_count_current
;
1001 vstream
->close_write_flag
= 1;
1002 pthread_mutex_unlock(&stream
->viewer_stream_rotation_lock
);
1005 /* Cleanup index of that stream. */
1006 relay_index_destroy_by_stream_id(stream
->stream_handle
);
1008 iter
.iter
.node
= &stream
->stream_n
.node
;
1009 delret
= lttng_ht_del(relay_streams_ht
, &iter
);
1011 iter
.iter
.node
= &stream
->ctf_trace_node
.node
;
1012 delret
= lttng_ht_del(stream
->ctf_traces_ht
, &iter
);
1015 if (stream
->ctf_trace
) {
1016 ctf_trace_try_destroy(stream
->ctf_trace
);
1019 call_rcu(&stream
->rcu_node
, deferred_free_stream
);
1020 DBG("Closed tracefile %d from close stream", stream
->fd
);
1024 * relay_delete_session: Free all memory associated with a session and
1028 void relay_delete_session(struct relay_command
*cmd
,
1029 struct lttng_ht
*sessions_ht
)
1031 struct lttng_ht_iter iter
;
1032 struct lttng_ht_node_ulong
*node
;
1033 struct relay_stream
*stream
;
1036 if (!cmd
->session
) {
1040 DBG("Relay deleting session %" PRIu64
, cmd
->session
->id
);
1043 cds_lfht_for_each_entry(relay_streams_ht
->ht
, &iter
.iter
, node
, node
) {
1044 node
= lttng_ht_iter_get_node_ulong(&iter
);
1048 stream
= caa_container_of(node
, struct relay_stream
, stream_n
);
1049 if (stream
->session
== cmd
->session
) {
1050 destroy_stream(stream
);
1051 cmd
->session
->stream_count
--;
1052 assert(cmd
->session
->stream_count
>= 0);
1056 /* Make this session not visible anymore. */
1057 iter
.iter
.node
= &cmd
->session
->session_n
.node
;
1058 ret
= lttng_ht_del(sessions_ht
, &iter
);
1060 call_rcu(&cmd
->session
->rcu_node
, deferred_free_session
);
1065 * Copy index data from the control port to a given index object.
1067 static void copy_index_control_data(struct relay_index
*index
,
1068 struct lttcomm_relayd_index
*data
)
1074 * The index on disk is encoded in big endian, so we don't need to convert
1075 * the data received on the network. The data_offset value is NEVER
1076 * modified here and is updated by the data thread.
1078 index
->index_data
.packet_size
= data
->packet_size
;
1079 index
->index_data
.content_size
= data
->content_size
;
1080 index
->index_data
.timestamp_begin
= data
->timestamp_begin
;
1081 index
->index_data
.timestamp_end
= data
->timestamp_end
;
1082 index
->index_data
.events_discarded
= data
->events_discarded
;
1083 index
->index_data
.stream_id
= data
->stream_id
;
1087 * Handle the RELAYD_CREATE_SESSION command.
1089 * On success, send back the session id or else return a negative value.
1092 int relay_create_session(struct lttcomm_relayd_hdr
*recv_hdr
,
1093 struct relay_command
*cmd
,
1094 struct lttng_ht
*sessions_ht
)
1096 int ret
= 0, send_ret
;
1097 struct relay_session
*session
;
1098 struct lttcomm_relayd_status_session reply
;
1103 memset(&reply
, 0, sizeof(reply
));
1105 session
= zmalloc(sizeof(struct relay_session
));
1106 if (session
== NULL
) {
1107 PERROR("relay session zmalloc");
1112 session
->id
= ++last_relay_session_id
;
1113 session
->sock
= cmd
->sock
;
1114 session
->minor
= cmd
->minor
;
1115 session
->major
= cmd
->major
;
1116 cmd
->session
= session
;
1118 reply
.session_id
= htobe64(session
->id
);
1120 switch (cmd
->minor
) {
1121 case 4: /* LTTng sessiond 2.4 */
1123 ret
= cmd_create_session_2_4(cmd
, session
);
1127 lttng_ht_node_init_ulong(&session
->session_n
,
1128 (unsigned long) session
->id
);
1129 lttng_ht_add_unique_ulong(sessions_ht
,
1130 &session
->session_n
);
1132 DBG("Created session %" PRIu64
, session
->id
);
1136 reply
.ret_code
= htobe32(LTTNG_ERR_FATAL
);
1138 reply
.ret_code
= htobe32(LTTNG_OK
);
1141 send_ret
= cmd
->sock
->ops
->sendmsg(cmd
->sock
, &reply
, sizeof(reply
), 0);
1143 ERR("Relayd sending session id");
1151 * relay_add_stream: allocate a new stream for a session
1154 int relay_add_stream(struct lttcomm_relayd_hdr
*recv_hdr
,
1155 struct relay_command
*cmd
, struct lttng_ht
*sessions_ht
)
1157 struct relay_session
*session
= cmd
->session
;
1158 struct relay_stream
*stream
= NULL
;
1159 struct lttcomm_relayd_status_stream reply
;
1162 if (!session
|| cmd
->version_check_done
== 0) {
1163 ERR("Trying to add a stream before version check");
1165 goto end_no_session
;
1168 stream
= zmalloc(sizeof(struct relay_stream
));
1169 if (stream
== NULL
) {
1170 PERROR("relay stream zmalloc");
1172 goto end_no_session
;
1175 switch (cmd
->minor
) {
1176 case 1: /* LTTng sessiond 2.1 */
1177 ret
= cmd_recv_stream_2_1(cmd
, stream
);
1179 case 2: /* LTTng sessiond 2.2 */
1181 ret
= cmd_recv_stream_2_2(cmd
, stream
);
1185 goto err_free_stream
;
1189 stream
->stream_handle
= ++last_relay_stream_id
;
1190 stream
->prev_seq
= -1ULL;
1191 stream
->session
= session
;
1192 stream
->index_fd
= -1;
1193 stream
->read_index_fd
= -1;
1194 stream
->ctf_trace
= NULL
;
1195 pthread_mutex_init(&stream
->lock
, NULL
);
1197 ret
= utils_mkdir_recursive(stream
->path_name
, S_IRWXU
| S_IRWXG
);
1199 ERR("relay creating output directory");
1204 * No need to use run_as API here because whatever we receives, the relayd
1205 * uses its own credentials for the stream files.
1207 ret
= utils_create_stream_file(stream
->path_name
, stream
->channel_name
,
1208 stream
->tracefile_size
, 0, relayd_uid
, relayd_gid
, NULL
);
1210 ERR("Create output file");
1214 if (stream
->tracefile_size
) {
1215 DBG("Tracefile %s/%s_0 created", stream
->path_name
, stream
->channel_name
);
1217 DBG("Tracefile %s/%s created", stream
->path_name
, stream
->channel_name
);
1220 if (!strncmp(stream
->channel_name
, DEFAULT_METADATA_NAME
, NAME_MAX
)) {
1221 stream
->metadata_flag
= 1;
1223 * When we receive a new metadata stream, we create a new
1224 * ctf_trace and we assign this ctf_trace to all streams with
1227 * If later on we receive a new stream for the same ctf_trace,
1228 * we copy the information from the first hit in the HT to the
1231 stream
->ctf_trace
= ctf_trace_create();
1232 if (!stream
->ctf_trace
) {
1236 stream
->ctf_trace
->refcount
++;
1237 stream
->ctf_trace
->metadata_stream
= stream
;
1239 ctf_trace_assign(cmd
->ctf_traces_ht
, stream
);
1240 stream
->ctf_traces_ht
= cmd
->ctf_traces_ht
;
1242 lttng_ht_node_init_ulong(&stream
->stream_n
,
1243 (unsigned long) stream
->stream_handle
);
1244 lttng_ht_add_unique_ulong(relay_streams_ht
,
1247 lttng_ht_node_init_str(&stream
->ctf_trace_node
, stream
->path_name
);
1248 lttng_ht_add_str(cmd
->ctf_traces_ht
, &stream
->ctf_trace_node
);
1249 session
->stream_count
++;
1251 DBG("Relay new stream added %s with ID %" PRIu64
, stream
->channel_name
,
1252 stream
->stream_handle
);
1255 reply
.handle
= htobe64(stream
->stream_handle
);
1256 /* send the session id to the client or a negative return code on error */
1258 reply
.ret_code
= htobe32(LTTNG_ERR_UNK
);
1259 /* stream was not properly added to the ht, so free it */
1262 reply
.ret_code
= htobe32(LTTNG_OK
);
1265 send_ret
= cmd
->sock
->ops
->sendmsg(cmd
->sock
, &reply
,
1266 sizeof(struct lttcomm_relayd_status_stream
), 0);
1268 ERR("Relay sending stream id");
1277 free(stream
->path_name
);
1278 free(stream
->channel_name
);
1284 * relay_close_stream: close a specific stream
1287 int relay_close_stream(struct lttcomm_relayd_hdr
*recv_hdr
,
1288 struct relay_command
*cmd
)
1291 struct relay_session
*session
= cmd
->session
;
1292 struct lttcomm_relayd_close_stream stream_info
;
1293 struct lttcomm_relayd_generic_reply reply
;
1294 struct relay_stream
*stream
;
1296 DBG("Close stream received");
1298 if (!session
|| cmd
->version_check_done
== 0) {
1299 ERR("Trying to close a stream before version check");
1301 goto end_no_session
;
1304 ret
= cmd
->sock
->ops
->recvmsg(cmd
->sock
, &stream_info
,
1305 sizeof(struct lttcomm_relayd_close_stream
), 0);
1306 if (ret
< sizeof(struct lttcomm_relayd_close_stream
)) {
1308 /* Orderly shutdown. Not necessary to print an error. */
1309 DBG("Socket %d did an orderly shutdown", cmd
->sock
->fd
);
1311 ERR("Relay didn't receive valid add_stream struct size : %d", ret
);
1314 goto end_no_session
;
1318 stream
= relay_stream_find_by_id(be64toh(stream_info
.stream_id
));
1324 stream
->last_net_seq_num
= be64toh(stream_info
.last_net_seq_num
);
1325 stream
->close_flag
= 1;
1326 session
->stream_count
--;
1327 assert(session
->stream_count
>= 0);
1329 if (close_stream_check(stream
)) {
1330 destroy_stream(stream
);
1337 reply
.ret_code
= htobe32(LTTNG_ERR_UNK
);
1339 reply
.ret_code
= htobe32(LTTNG_OK
);
1341 send_ret
= cmd
->sock
->ops
->sendmsg(cmd
->sock
, &reply
,
1342 sizeof(struct lttcomm_relayd_generic_reply
), 0);
1344 ERR("Relay sending stream id");
1353 * relay_unknown_command: send -1 if received unknown command
1356 void relay_unknown_command(struct relay_command
*cmd
)
1358 struct lttcomm_relayd_generic_reply reply
;
1361 reply
.ret_code
= htobe32(LTTNG_ERR_UNK
);
1362 ret
= cmd
->sock
->ops
->sendmsg(cmd
->sock
, &reply
,
1363 sizeof(struct lttcomm_relayd_generic_reply
), 0);
1365 ERR("Relay sending unknown command");
1370 * relay_start: send an acknowledgment to the client to tell if we are
1371 * ready to receive data. We are ready if a session is established.
1374 int relay_start(struct lttcomm_relayd_hdr
*recv_hdr
,
1375 struct relay_command
*cmd
)
1377 int ret
= htobe32(LTTNG_OK
);
1378 struct lttcomm_relayd_generic_reply reply
;
1379 struct relay_session
*session
= cmd
->session
;
1382 DBG("Trying to start the streaming without a session established");
1383 ret
= htobe32(LTTNG_ERR_UNK
);
1386 reply
.ret_code
= ret
;
1387 ret
= cmd
->sock
->ops
->sendmsg(cmd
->sock
, &reply
,
1388 sizeof(struct lttcomm_relayd_generic_reply
), 0);
1390 ERR("Relay sending start ack");
1397 * Append padding to the file pointed by the file descriptor fd.
1399 static int write_padding_to_file(int fd
, uint32_t size
)
1408 zeros
= zmalloc(size
);
1409 if (zeros
== NULL
) {
1410 PERROR("zmalloc zeros for padding");
1415 ret
= lttng_write(fd
, zeros
, size
);
1417 PERROR("write padding to file");
1427 * relay_recv_metadata: receive the metada for the session.
1430 int relay_recv_metadata(struct lttcomm_relayd_hdr
*recv_hdr
,
1431 struct relay_command
*cmd
)
1433 int ret
= htobe32(LTTNG_OK
);
1435 struct relay_session
*session
= cmd
->session
;
1436 struct lttcomm_relayd_metadata_payload
*metadata_struct
;
1437 struct relay_stream
*metadata_stream
;
1438 uint64_t data_size
, payload_size
;
1441 ERR("Metadata sent before version check");
1446 data_size
= payload_size
= be64toh(recv_hdr
->data_size
);
1447 if (data_size
< sizeof(struct lttcomm_relayd_metadata_payload
)) {
1448 ERR("Incorrect data size");
1452 payload_size
-= sizeof(struct lttcomm_relayd_metadata_payload
);
1454 if (data_buffer_size
< data_size
) {
1455 /* In case the realloc fails, we can free the memory */
1458 tmp_data_ptr
= realloc(data_buffer
, data_size
);
1459 if (!tmp_data_ptr
) {
1460 ERR("Allocating data buffer");
1465 data_buffer
= tmp_data_ptr
;
1466 data_buffer_size
= data_size
;
1468 memset(data_buffer
, 0, data_size
);
1469 DBG2("Relay receiving metadata, waiting for %" PRIu64
" bytes", data_size
);
1470 ret
= cmd
->sock
->ops
->recvmsg(cmd
->sock
, data_buffer
, data_size
, 0);
1471 if (ret
< 0 || ret
!= data_size
) {
1473 /* Orderly shutdown. Not necessary to print an error. */
1474 DBG("Socket %d did an orderly shutdown", cmd
->sock
->fd
);
1476 ERR("Relay didn't receive the whole metadata");
1481 metadata_struct
= (struct lttcomm_relayd_metadata_payload
*) data_buffer
;
1484 metadata_stream
= relay_stream_find_by_id(
1485 be64toh(metadata_struct
->stream_id
));
1486 if (!metadata_stream
) {
1491 size_ret
= lttng_write(metadata_stream
->fd
, metadata_struct
->payload
,
1493 if (size_ret
< payload_size
) {
1494 ERR("Relay error writing metadata on file");
1499 ret
= write_padding_to_file(metadata_stream
->fd
,
1500 be32toh(metadata_struct
->padding_size
));
1504 metadata_stream
->ctf_trace
->metadata_received
+=
1505 payload_size
+ be32toh(metadata_struct
->padding_size
);
1507 DBG2("Relay metadata written");
1516 * relay_send_version: send relayd version number
1519 int relay_send_version(struct lttcomm_relayd_hdr
*recv_hdr
,
1520 struct relay_command
*cmd
, struct lttng_ht
*sessions_ht
)
1523 struct lttcomm_relayd_version reply
, msg
;
1527 cmd
->version_check_done
= 1;
1529 /* Get version from the other side. */
1530 ret
= cmd
->sock
->ops
->recvmsg(cmd
->sock
, &msg
, sizeof(msg
), 0);
1531 if (ret
< 0 || ret
!= sizeof(msg
)) {
1533 /* Orderly shutdown. Not necessary to print an error. */
1534 DBG("Socket %d did an orderly shutdown", cmd
->sock
->fd
);
1536 ERR("Relay failed to receive the version values.");
1542 reply
.major
= RELAYD_VERSION_COMM_MAJOR
;
1543 reply
.minor
= RELAYD_VERSION_COMM_MINOR
;
1545 /* Major versions must be the same */
1546 if (reply
.major
!= be32toh(msg
.major
)) {
1547 DBG("Incompatible major versions (%u vs %u), deleting session",
1548 reply
.major
, be32toh(msg
.major
));
1549 relay_delete_session(cmd
, sessions_ht
);
1554 cmd
->major
= reply
.major
;
1555 /* We adapt to the lowest compatible version */
1556 if (reply
.minor
<= be32toh(msg
.minor
)) {
1557 cmd
->minor
= reply
.minor
;
1559 cmd
->minor
= be32toh(msg
.minor
);
1562 reply
.major
= htobe32(reply
.major
);
1563 reply
.minor
= htobe32(reply
.minor
);
1564 ret
= cmd
->sock
->ops
->sendmsg(cmd
->sock
, &reply
,
1565 sizeof(struct lttcomm_relayd_version
), 0);
1567 ERR("Relay sending version");
1570 DBG("Version check done using protocol %u.%u", cmd
->major
,
1578 * Check for data pending for a given stream id from the session daemon.
1581 int relay_data_pending(struct lttcomm_relayd_hdr
*recv_hdr
,
1582 struct relay_command
*cmd
)
1584 struct relay_session
*session
= cmd
->session
;
1585 struct lttcomm_relayd_data_pending msg
;
1586 struct lttcomm_relayd_generic_reply reply
;
1587 struct relay_stream
*stream
;
1589 uint64_t last_net_seq_num
, stream_id
;
1591 DBG("Data pending command received");
1593 if (!session
|| cmd
->version_check_done
== 0) {
1594 ERR("Trying to check for data before version check");
1596 goto end_no_session
;
1599 ret
= cmd
->sock
->ops
->recvmsg(cmd
->sock
, &msg
, sizeof(msg
), 0);
1600 if (ret
< sizeof(msg
)) {
1602 /* Orderly shutdown. Not necessary to print an error. */
1603 DBG("Socket %d did an orderly shutdown", cmd
->sock
->fd
);
1605 ERR("Relay didn't receive valid data_pending struct size : %d",
1609 goto end_no_session
;
1612 stream_id
= be64toh(msg
.stream_id
);
1613 last_net_seq_num
= be64toh(msg
.last_net_seq_num
);
1616 stream
= relay_stream_find_by_id(stream_id
);
1617 if (stream
== NULL
) {
1622 DBG("Data pending for stream id %" PRIu64
" prev_seq %" PRIu64
1623 " and last_seq %" PRIu64
, stream_id
, stream
->prev_seq
,
1626 /* Avoid wrapping issue */
1627 if (((int64_t) (stream
->prev_seq
- last_net_seq_num
)) >= 0) {
1628 /* Data has in fact been written and is NOT pending */
1631 /* Data still being streamed thus pending */
1635 /* Pending check is now done. */
1636 stream
->data_pending_check_done
= 1;
1641 reply
.ret_code
= htobe32(ret
);
1642 ret
= cmd
->sock
->ops
->sendmsg(cmd
->sock
, &reply
, sizeof(reply
), 0);
1644 ERR("Relay data pending ret code failed");
1652 * Wait for the control socket to reach a quiescent state.
1654 * Note that for now, when receiving this command from the session daemon, this
1655 * means that every subsequent commands or data received on the control socket
1656 * has been handled. So, this is why we simply return OK here.
1659 int relay_quiescent_control(struct lttcomm_relayd_hdr
*recv_hdr
,
1660 struct relay_command
*cmd
)
1664 struct relay_stream
*stream
;
1665 struct lttng_ht_iter iter
;
1666 struct lttcomm_relayd_quiescent_control msg
;
1667 struct lttcomm_relayd_generic_reply reply
;
1669 DBG("Checking quiescent state on control socket");
1671 if (!cmd
->session
|| cmd
->version_check_done
== 0) {
1672 ERR("Trying to check for data before version check");
1674 goto end_no_session
;
1677 ret
= cmd
->sock
->ops
->recvmsg(cmd
->sock
, &msg
, sizeof(msg
), 0);
1678 if (ret
< sizeof(msg
)) {
1680 /* Orderly shutdown. Not necessary to print an error. */
1681 DBG("Socket %d did an orderly shutdown", cmd
->sock
->fd
);
1683 ERR("Relay didn't receive valid begin data_pending struct size: %d",
1687 goto end_no_session
;
1690 stream_id
= be64toh(msg
.stream_id
);
1693 cds_lfht_for_each_entry(relay_streams_ht
->ht
, &iter
.iter
, stream
,
1695 if (stream
->stream_handle
== stream_id
) {
1696 stream
->data_pending_check_done
= 1;
1697 DBG("Relay quiescent control pending flag set to %" PRIu64
,
1704 reply
.ret_code
= htobe32(LTTNG_OK
);
1705 ret
= cmd
->sock
->ops
->sendmsg(cmd
->sock
, &reply
, sizeof(reply
), 0);
1707 ERR("Relay data quiescent control ret code failed");
1715 * Initialize a data pending command. This means that a client is about to ask
1716 * for data pending for each stream he/she holds. Simply iterate over all
1717 * streams of a session and set the data_pending_check_done flag.
1719 * This command returns to the client a LTTNG_OK code.
1722 int relay_begin_data_pending(struct lttcomm_relayd_hdr
*recv_hdr
,
1723 struct relay_command
*cmd
)
1726 struct lttng_ht_iter iter
;
1727 struct lttcomm_relayd_begin_data_pending msg
;
1728 struct lttcomm_relayd_generic_reply reply
;
1729 struct relay_stream
*stream
;
1730 uint64_t session_id
;
1735 DBG("Init streams for data pending");
1737 if (!cmd
->session
|| cmd
->version_check_done
== 0) {
1738 ERR("Trying to check for data before version check");
1740 goto end_no_session
;
1743 ret
= cmd
->sock
->ops
->recvmsg(cmd
->sock
, &msg
, sizeof(msg
), 0);
1744 if (ret
< sizeof(msg
)) {
1746 /* Orderly shutdown. Not necessary to print an error. */
1747 DBG("Socket %d did an orderly shutdown", cmd
->sock
->fd
);
1749 ERR("Relay didn't receive valid begin data_pending struct size: %d",
1753 goto end_no_session
;
1756 session_id
= be64toh(msg
.session_id
);
1759 * Iterate over all streams to set the begin data pending flag. For now, the
1760 * streams are indexed by stream handle so we have to iterate over all
1761 * streams to find the one associated with the right session_id.
1764 cds_lfht_for_each_entry(relay_streams_ht
->ht
, &iter
.iter
, stream
,
1766 if (stream
->session
->id
== session_id
) {
1767 stream
->data_pending_check_done
= 0;
1768 DBG("Set begin data pending flag to stream %" PRIu64
,
1769 stream
->stream_handle
);
1774 /* All good, send back reply. */
1775 reply
.ret_code
= htobe32(LTTNG_OK
);
1777 ret
= cmd
->sock
->ops
->sendmsg(cmd
->sock
, &reply
, sizeof(reply
), 0);
1779 ERR("Relay begin data pending send reply failed");
1787 * End data pending command. This will check, for a given session id, if each
1788 * stream associated with it has its data_pending_check_done flag set. If not,
1789 * this means that the client lost track of the stream but the data is still
1790 * being streamed on our side. In this case, we inform the client that data is
1793 * Return to the client if there is data in flight or not with a ret_code.
1796 int relay_end_data_pending(struct lttcomm_relayd_hdr
*recv_hdr
,
1797 struct relay_command
*cmd
)
1800 struct lttng_ht_iter iter
;
1801 struct lttcomm_relayd_end_data_pending msg
;
1802 struct lttcomm_relayd_generic_reply reply
;
1803 struct relay_stream
*stream
;
1804 uint64_t session_id
;
1805 uint32_t is_data_inflight
= 0;
1810 DBG("End data pending command");
1812 if (!cmd
->session
|| cmd
->version_check_done
== 0) {
1813 ERR("Trying to check for data before version check");
1815 goto end_no_session
;
1818 ret
= cmd
->sock
->ops
->recvmsg(cmd
->sock
, &msg
, sizeof(msg
), 0);
1819 if (ret
< sizeof(msg
)) {
1821 /* Orderly shutdown. Not necessary to print an error. */
1822 DBG("Socket %d did an orderly shutdown", cmd
->sock
->fd
);
1824 ERR("Relay didn't receive valid end data_pending struct size: %d",
1828 goto end_no_session
;
1831 session_id
= be64toh(msg
.session_id
);
1833 /* Iterate over all streams to see if the begin data pending flag is set. */
1835 cds_lfht_for_each_entry(relay_streams_ht
->ht
, &iter
.iter
, stream
,
1837 if (stream
->session
->id
== session_id
&&
1838 !stream
->data_pending_check_done
) {
1839 is_data_inflight
= 1;
1840 DBG("Data is still in flight for stream %" PRIu64
,
1841 stream
->stream_handle
);
1847 /* All good, send back reply. */
1848 reply
.ret_code
= htobe32(is_data_inflight
);
1850 ret
= cmd
->sock
->ops
->sendmsg(cmd
->sock
, &reply
, sizeof(reply
), 0);
1852 ERR("Relay end data pending send reply failed");
1860 * Receive an index for a specific stream.
1862 * Return 0 on success else a negative value.
1865 int relay_recv_index(struct lttcomm_relayd_hdr
*recv_hdr
,
1866 struct relay_command
*cmd
)
1868 int ret
, send_ret
, index_created
= 0;
1869 struct relay_session
*session
= cmd
->session
;
1870 struct lttcomm_relayd_index index_info
;
1871 struct relay_index
*index
, *wr_index
= NULL
;
1872 struct lttcomm_relayd_generic_reply reply
;
1873 struct relay_stream
*stream
;
1874 uint64_t net_seq_num
;
1878 DBG("Relay receiving index");
1880 if (!session
|| cmd
->version_check_done
== 0) {
1881 ERR("Trying to close a stream before version check");
1883 goto end_no_session
;
1886 ret
= cmd
->sock
->ops
->recvmsg(cmd
->sock
, &index_info
,
1887 sizeof(index_info
), 0);
1888 if (ret
< sizeof(index_info
)) {
1890 /* Orderly shutdown. Not necessary to print an error. */
1891 DBG("Socket %d did an orderly shutdown", cmd
->sock
->fd
);
1893 ERR("Relay didn't receive valid index struct size : %d", ret
);
1896 goto end_no_session
;
1899 net_seq_num
= be64toh(index_info
.net_seq_num
);
1902 stream
= relay_stream_find_by_id(be64toh(index_info
.relay_stream_id
));
1905 goto end_rcu_unlock
;
1908 /* Live beacon handling */
1909 if (index_info
.packet_size
== 0) {
1910 DBG("Received live beacon for stream %" PRIu64
, stream
->stream_handle
);
1913 * Only flag a stream inactive when it has already received data.
1915 if (stream
->total_index_received
> 0) {
1916 stream
->beacon_ts_end
= be64toh(index_info
.timestamp_end
);
1919 goto end_rcu_unlock
;
1921 stream
->beacon_ts_end
= -1ULL;
1924 index
= relay_index_find(stream
->stream_handle
, net_seq_num
);
1926 /* A successful creation will add the object to the HT. */
1927 index
= relay_index_create(stream
->stream_handle
, net_seq_num
);
1929 goto end_rcu_unlock
;
1934 copy_index_control_data(index
, &index_info
);
1936 if (index_created
) {
1938 * Try to add the relay index object to the hash table. If an object
1939 * already exist, destroy back the index created, set the data in this
1940 * object and write it on disk.
1942 relay_index_add(index
, &wr_index
);
1944 copy_index_control_data(wr_index
, &index_info
);
1948 /* The index already exists so write it on disk. */
1952 /* Do we have a writable ready index to write on disk. */
1954 /* Starting at 2.4, create the index file if none available. */
1955 if (cmd
->minor
>= 4 && stream
->index_fd
< 0) {
1956 ret
= index_create_file(stream
->path_name
, stream
->channel_name
,
1957 relayd_uid
, relayd_gid
, stream
->tracefile_size
,
1958 stream
->tracefile_count_current
);
1960 goto end_rcu_unlock
;
1962 stream
->index_fd
= ret
;
1965 ret
= relay_index_write(wr_index
->fd
, wr_index
);
1967 goto end_rcu_unlock
;
1969 stream
->total_index_received
++;
1976 reply
.ret_code
= htobe32(LTTNG_ERR_UNK
);
1978 reply
.ret_code
= htobe32(LTTNG_OK
);
1980 send_ret
= cmd
->sock
->ops
->sendmsg(cmd
->sock
, &reply
, sizeof(reply
), 0);
1982 ERR("Relay sending close index id reply");
1991 * Process the commands received on the control socket
1994 int relay_process_control(struct lttcomm_relayd_hdr
*recv_hdr
,
1995 struct relay_command
*cmd
, struct relay_local_data
*ctx
)
1999 switch (be32toh(recv_hdr
->cmd
)) {
2000 case RELAYD_CREATE_SESSION
:
2001 ret
= relay_create_session(recv_hdr
, cmd
, ctx
->sessions_ht
);
2003 case RELAYD_ADD_STREAM
:
2004 ret
= relay_add_stream(recv_hdr
, cmd
, ctx
->sessions_ht
);
2006 case RELAYD_START_DATA
:
2007 ret
= relay_start(recv_hdr
, cmd
);
2009 case RELAYD_SEND_METADATA
:
2010 ret
= relay_recv_metadata(recv_hdr
, cmd
);
2012 case RELAYD_VERSION
:
2013 ret
= relay_send_version(recv_hdr
, cmd
, ctx
->sessions_ht
);
2015 case RELAYD_CLOSE_STREAM
:
2016 ret
= relay_close_stream(recv_hdr
, cmd
);
2018 case RELAYD_DATA_PENDING
:
2019 ret
= relay_data_pending(recv_hdr
, cmd
);
2021 case RELAYD_QUIESCENT_CONTROL
:
2022 ret
= relay_quiescent_control(recv_hdr
, cmd
);
2024 case RELAYD_BEGIN_DATA_PENDING
:
2025 ret
= relay_begin_data_pending(recv_hdr
, cmd
);
2027 case RELAYD_END_DATA_PENDING
:
2028 ret
= relay_end_data_pending(recv_hdr
, cmd
);
2030 case RELAYD_SEND_INDEX
:
2031 ret
= relay_recv_index(recv_hdr
, cmd
);
2033 case RELAYD_UPDATE_SYNC_INFO
:
2035 ERR("Received unknown command (%u)", be32toh(recv_hdr
->cmd
));
2036 relay_unknown_command(cmd
);
2046 * Handle index for a data stream.
2048 * RCU read side lock MUST be acquired.
2050 * Return 0 on success else a negative value.
2052 static int handle_index_data(struct relay_stream
*stream
, uint64_t net_seq_num
,
2055 int ret
= 0, index_created
= 0;
2056 uint64_t stream_id
, data_offset
;
2057 struct relay_index
*index
, *wr_index
= NULL
;
2061 stream_id
= stream
->stream_handle
;
2062 /* Get data offset because we are about to update the index. */
2063 data_offset
= htobe64(stream
->tracefile_size_current
);
2066 * Lookup for an existing index for that stream id/sequence number. If on
2067 * exists, the control thread already received the data for it thus we need
2068 * to write it on disk.
2070 index
= relay_index_find(stream_id
, net_seq_num
);
2072 /* A successful creation will add the object to the HT. */
2073 index
= relay_index_create(stream_id
, net_seq_num
);
2081 if (rotate_index
|| stream
->index_fd
< 0) {
2082 index
->to_close_fd
= stream
->index_fd
;
2083 ret
= index_create_file(stream
->path_name
, stream
->channel_name
,
2084 relayd_uid
, relayd_gid
, stream
->tracefile_size
,
2085 stream
->tracefile_count_current
);
2087 /* This will close the stream's index fd if one. */
2088 relay_index_free_safe(index
);
2091 stream
->index_fd
= ret
;
2093 index
->fd
= stream
->index_fd
;
2094 index
->index_data
.offset
= data_offset
;
2096 if (index_created
) {
2098 * Try to add the relay index object to the hash table. If an object
2099 * already exist, destroy back the index created and set the data.
2101 relay_index_add(index
, &wr_index
);
2103 /* Copy back data from the created index. */
2104 wr_index
->fd
= index
->fd
;
2105 wr_index
->to_close_fd
= index
->to_close_fd
;
2106 wr_index
->index_data
.offset
= data_offset
;
2110 /* The index already exists so write it on disk. */
2114 /* Do we have a writable ready index to write on disk. */
2116 ret
= relay_index_write(wr_index
->fd
, wr_index
);
2120 stream
->total_index_received
++;
2128 * relay_process_data: Process the data received on the data socket
2131 int relay_process_data(struct relay_command
*cmd
)
2133 int ret
= 0, rotate_index
= 0;
2135 struct relay_stream
*stream
;
2136 struct lttcomm_relayd_data_hdr data_hdr
;
2138 uint64_t net_seq_num
;
2141 ret
= cmd
->sock
->ops
->recvmsg(cmd
->sock
, &data_hdr
,
2142 sizeof(struct lttcomm_relayd_data_hdr
), 0);
2145 /* Orderly shutdown. Not necessary to print an error. */
2146 DBG("Socket %d did an orderly shutdown", cmd
->sock
->fd
);
2148 ERR("Unable to receive data header on sock %d", cmd
->sock
->fd
);
2154 stream_id
= be64toh(data_hdr
.stream_id
);
2157 stream
= relay_stream_find_by_id(stream_id
);
2160 goto end_rcu_unlock
;
2163 data_size
= be32toh(data_hdr
.data_size
);
2164 if (data_buffer_size
< data_size
) {
2167 tmp_data_ptr
= realloc(data_buffer
, data_size
);
2168 if (!tmp_data_ptr
) {
2169 ERR("Allocating data buffer");
2172 goto end_rcu_unlock
;
2174 data_buffer
= tmp_data_ptr
;
2175 data_buffer_size
= data_size
;
2177 memset(data_buffer
, 0, data_size
);
2179 net_seq_num
= be64toh(data_hdr
.net_seq_num
);
2181 DBG3("Receiving data of size %u for stream id %" PRIu64
" seqnum %" PRIu64
,
2182 data_size
, stream_id
, net_seq_num
);
2183 ret
= cmd
->sock
->ops
->recvmsg(cmd
->sock
, data_buffer
, data_size
, 0);
2186 /* Orderly shutdown. Not necessary to print an error. */
2187 DBG("Socket %d did an orderly shutdown", cmd
->sock
->fd
);
2190 goto end_rcu_unlock
;
2193 /* Check if a rotation is needed. */
2194 if (stream
->tracefile_size
> 0 &&
2195 (stream
->tracefile_size_current
+ data_size
) >
2196 stream
->tracefile_size
) {
2197 struct relay_viewer_stream
*vstream
;
2200 new_id
= (stream
->tracefile_count_current
+ 1) %
2201 stream
->tracefile_count
;
2203 * When we wrap-around back to 0, we start overwriting old
2206 if (!stream
->tracefile_overwrite
&& new_id
== 0) {
2207 stream
->tracefile_overwrite
= 1;
2209 pthread_mutex_lock(&stream
->viewer_stream_rotation_lock
);
2210 if (stream
->tracefile_overwrite
) {
2211 stream
->oldest_tracefile_id
=
2212 (stream
->oldest_tracefile_id
+ 1) %
2213 stream
->tracefile_count
;
2215 vstream
= live_find_viewer_stream_by_id(stream
->stream_handle
);
2218 * The viewer is reading a file about to be
2219 * overwritten. Close the FDs it is
2220 * currently using and let it handle the fault.
2222 if (vstream
->tracefile_count_current
== new_id
) {
2223 pthread_mutex_lock(&vstream
->overwrite_lock
);
2224 vstream
->abort_flag
= 1;
2225 pthread_mutex_unlock(&vstream
->overwrite_lock
);
2226 DBG("Streaming side setting abort_flag on stream %s_%lu\n",
2227 stream
->channel_name
, new_id
);
2228 } else if (vstream
->tracefile_count_current
==
2229 stream
->tracefile_count_current
) {
2231 * The reader and writer were in the
2232 * same trace file, inform the viewer
2233 * that no new index will ever be added
2236 vstream
->close_write_flag
= 1;
2239 ret
= utils_rotate_stream_file(stream
->path_name
, stream
->channel_name
,
2240 stream
->tracefile_size
, stream
->tracefile_count
,
2241 relayd_uid
, relayd_gid
, stream
->fd
,
2242 &(stream
->tracefile_count_current
), &stream
->fd
);
2243 stream
->total_index_received
= 0;
2244 pthread_mutex_unlock(&stream
->viewer_stream_rotation_lock
);
2246 ERR("Rotating stream output file");
2247 goto end_rcu_unlock
;
2249 /* Reset current size because we just perform a stream rotation. */
2250 stream
->tracefile_size_current
= 0;
2255 * Index are handled in protocol version 2.4 and above. Also, snapshot and
2256 * index are NOT supported.
2258 if (stream
->session
->minor
>= 4 && !stream
->session
->snapshot
) {
2259 ret
= handle_index_data(stream
, net_seq_num
, rotate_index
);
2261 goto end_rcu_unlock
;
2265 /* Write data to stream output fd. */
2266 size_ret
= lttng_write(stream
->fd
, data_buffer
, data_size
);
2267 if (size_ret
< data_size
) {
2268 ERR("Relay error writing data to file");
2270 goto end_rcu_unlock
;
2273 DBG2("Relay wrote %d bytes to tracefile for stream id %" PRIu64
,
2274 ret
, stream
->stream_handle
);
2276 ret
= write_padding_to_file(stream
->fd
, be32toh(data_hdr
.padding_size
));
2278 goto end_rcu_unlock
;
2280 stream
->tracefile_size_current
+= data_size
+ be32toh(data_hdr
.padding_size
);
2282 stream
->prev_seq
= net_seq_num
;
2284 /* Check if we need to close the FD */
2285 if (close_stream_check(stream
)) {
2286 destroy_stream(stream
);
2296 void relay_cleanup_poll_connection(struct lttng_poll_event
*events
, int pollfd
)
2300 lttng_poll_del(events
, pollfd
);
2302 ret
= close(pollfd
);
2304 ERR("Closing pollfd %d", pollfd
);
2309 int relay_add_connection(int fd
, struct lttng_poll_event
*events
,
2310 struct lttng_ht
*relay_connections_ht
)
2312 struct relay_command
*relay_connection
;
2315 relay_connection
= zmalloc(sizeof(struct relay_command
));
2316 if (relay_connection
== NULL
) {
2317 PERROR("Relay command zmalloc");
2320 ret
= lttng_read(fd
, relay_connection
, sizeof(struct relay_command
));
2321 if (ret
< sizeof(struct relay_command
)) {
2322 PERROR("read relay cmd pipe");
2327 * Only used by the control side and the reference is copied inside each
2328 * stream from that connection. Thus a destroy HT must be done after every
2329 * stream has been destroyed.
2331 if (relay_connection
->type
== RELAY_CONTROL
) {
2332 relay_connection
->ctf_traces_ht
= lttng_ht_new(0,
2333 LTTNG_HT_TYPE_STRING
);
2334 if (!relay_connection
->ctf_traces_ht
) {
2339 lttng_ht_node_init_ulong(&relay_connection
->sock_n
,
2340 (unsigned long) relay_connection
->sock
->fd
);
2342 lttng_ht_add_unique_ulong(relay_connections_ht
,
2343 &relay_connection
->sock_n
);
2345 return lttng_poll_add(events
,
2346 relay_connection
->sock
->fd
,
2347 LPOLLIN
| LPOLLRDHUP
);
2350 free(relay_connection
);
2356 void deferred_free_connection(struct rcu_head
*head
)
2358 struct relay_command
*relay_connection
=
2359 caa_container_of(head
, struct relay_command
, rcu_node
);
2361 lttcomm_destroy_sock(relay_connection
->sock
);
2362 free(relay_connection
);
2366 void relay_del_connection(struct lttng_ht
*relay_connections_ht
,
2367 struct lttng_ht_iter
*iter
, struct relay_command
*relay_connection
,
2368 struct lttng_ht
*sessions_ht
)
2372 ret
= lttng_ht_del(relay_connections_ht
, iter
);
2375 if (relay_connection
->type
== RELAY_CONTROL
) {
2376 relay_delete_session(relay_connection
, sessions_ht
);
2377 lttng_ht_destroy(relay_connection
->ctf_traces_ht
);
2380 call_rcu(&relay_connection
->rcu_node
, deferred_free_connection
);
2384 * This thread does the actual work
2387 void *relay_thread_worker(void *data
)
2389 int ret
, err
= -1, last_seen_data_fd
= -1;
2391 struct relay_command
*relay_connection
;
2392 struct lttng_poll_event events
;
2393 struct lttng_ht
*relay_connections_ht
;
2394 struct lttng_ht_node_ulong
*node
;
2395 struct lttng_ht_iter iter
;
2396 struct lttcomm_relayd_hdr recv_hdr
;
2397 struct relay_local_data
*relay_ctx
= (struct relay_local_data
*) data
;
2398 struct lttng_ht
*sessions_ht
= relay_ctx
->sessions_ht
;
2400 DBG("[thread] Relay worker started");
2402 rcu_register_thread();
2404 health_register(health_relayd
, HEALTH_RELAYD_TYPE_WORKER
);
2406 health_code_update();
2408 /* table of connections indexed on socket */
2409 relay_connections_ht
= lttng_ht_new(0, LTTNG_HT_TYPE_ULONG
);
2410 if (!relay_connections_ht
) {
2411 goto relay_connections_ht_error
;
2414 /* Tables of received indexes indexed by index handle and net_seq_num. */
2415 indexes_ht
= lttng_ht_new(0, LTTNG_HT_TYPE_TWO_U64
);
2417 goto indexes_ht_error
;
2420 ret
= create_thread_poll_set(&events
, 2);
2422 goto error_poll_create
;
2425 ret
= lttng_poll_add(&events
, relay_cmd_pipe
[0], LPOLLIN
| LPOLLRDHUP
);
2432 int idx
= -1, i
, seen_control
= 0, last_notdel_data_fd
= -1;
2434 health_code_update();
2436 /* Infinite blocking call, waiting for transmission */
2437 DBG3("Relayd worker thread polling...");
2438 health_poll_entry();
2439 ret
= lttng_poll_wait(&events
, -1);
2443 * Restart interrupted system call.
2445 if (errno
== EINTR
) {
2454 * Process control. The control connection is prioritised so we don't
2455 * starve it with high throughout put tracing data on the data
2458 for (i
= 0; i
< nb_fd
; i
++) {
2459 /* Fetch once the poll data */
2460 uint32_t revents
= LTTNG_POLL_GETEV(&events
, i
);
2461 int pollfd
= LTTNG_POLL_GETFD(&events
, i
);
2463 health_code_update();
2465 /* Thread quit pipe has been closed. Killing thread. */
2466 ret
= check_thread_quit_pipe(pollfd
, revents
);
2472 /* Inspect the relay cmd pipe for new connection */
2473 if (pollfd
== relay_cmd_pipe
[0]) {
2474 if (revents
& (LPOLLERR
| LPOLLHUP
| LPOLLRDHUP
)) {
2475 ERR("Relay pipe error");
2477 } else if (revents
& LPOLLIN
) {
2478 DBG("Relay command received");
2479 ret
= relay_add_connection(relay_cmd_pipe
[0],
2480 &events
, relay_connections_ht
);
2485 } else if (revents
) {
2487 lttng_ht_lookup(relay_connections_ht
,
2488 (void *)((unsigned long) pollfd
),
2490 node
= lttng_ht_iter_get_node_ulong(&iter
);
2492 DBG2("Relay sock %d not found", pollfd
);
2496 relay_connection
= caa_container_of(node
,
2497 struct relay_command
, sock_n
);
2499 if (revents
& (LPOLLERR
)) {
2501 relay_cleanup_poll_connection(&events
, pollfd
);
2502 relay_del_connection(relay_connections_ht
,
2503 &iter
, relay_connection
, sessions_ht
);
2504 if (last_seen_data_fd
== pollfd
) {
2505 last_seen_data_fd
= last_notdel_data_fd
;
2507 } else if (revents
& (LPOLLHUP
| LPOLLRDHUP
)) {
2508 DBG("Socket %d hung up", pollfd
);
2509 relay_cleanup_poll_connection(&events
, pollfd
);
2510 relay_del_connection(relay_connections_ht
,
2511 &iter
, relay_connection
, sessions_ht
);
2512 if (last_seen_data_fd
== pollfd
) {
2513 last_seen_data_fd
= last_notdel_data_fd
;
2515 } else if (revents
& LPOLLIN
) {
2516 /* control socket */
2517 if (relay_connection
->type
== RELAY_CONTROL
) {
2518 ret
= relay_connection
->sock
->ops
->recvmsg(
2519 relay_connection
->sock
, &recv_hdr
,
2520 sizeof(struct lttcomm_relayd_hdr
), 0);
2521 /* connection closed */
2523 relay_cleanup_poll_connection(&events
, pollfd
);
2524 relay_del_connection(relay_connections_ht
,
2525 &iter
, relay_connection
, sessions_ht
);
2526 DBG("Control connection closed with %d", pollfd
);
2528 if (relay_connection
->session
) {
2529 DBG2("Relay worker receiving data for session : %" PRIu64
,
2530 relay_connection
->session
->id
);
2532 ret
= relay_process_control(&recv_hdr
,
2533 relay_connection
, relay_ctx
);
2535 /* Clear the session on error. */
2536 relay_cleanup_poll_connection(&events
, pollfd
);
2537 relay_del_connection(relay_connections_ht
,
2538 &iter
, relay_connection
, sessions_ht
);
2539 DBG("Connection closed with %d", pollfd
);
2545 * Flag the last seen data fd not deleted. It will be
2546 * used as the last seen fd if any fd gets deleted in
2549 last_notdel_data_fd
= pollfd
;
2557 * The last loop handled a control request, go back to poll to make
2558 * sure we prioritise the control socket.
2564 if (last_seen_data_fd
>= 0) {
2565 for (i
= 0; i
< nb_fd
; i
++) {
2566 int pollfd
= LTTNG_POLL_GETFD(&events
, i
);
2568 health_code_update();
2570 if (last_seen_data_fd
== pollfd
) {
2577 /* Process data connection. */
2578 for (i
= idx
+ 1; i
< nb_fd
; i
++) {
2579 /* Fetch the poll data. */
2580 uint32_t revents
= LTTNG_POLL_GETEV(&events
, i
);
2581 int pollfd
= LTTNG_POLL_GETFD(&events
, i
);
2583 health_code_update();
2585 /* Skip the command pipe. It's handled in the first loop. */
2586 if (pollfd
== relay_cmd_pipe
[0]) {
2592 lttng_ht_lookup(relay_connections_ht
,
2593 (void *)((unsigned long) pollfd
),
2595 node
= lttng_ht_iter_get_node_ulong(&iter
);
2597 /* Skip it. Might be removed before. */
2601 relay_connection
= caa_container_of(node
,
2602 struct relay_command
, sock_n
);
2604 if (revents
& LPOLLIN
) {
2605 if (relay_connection
->type
!= RELAY_DATA
) {
2609 ret
= relay_process_data(relay_connection
);
2610 /* connection closed */
2612 relay_cleanup_poll_connection(&events
, pollfd
);
2613 relay_del_connection(relay_connections_ht
,
2614 &iter
, relay_connection
, sessions_ht
);
2615 DBG("Data connection closed with %d", pollfd
);
2617 * Every goto restart call sets the last seen fd where
2618 * here we don't really care since we gracefully
2619 * continue the loop after the connection is deleted.
2622 /* Keep last seen port. */
2623 last_seen_data_fd
= pollfd
;
2631 last_seen_data_fd
= -1;
2634 /* Normal exit, no error */
2639 lttng_poll_clean(&events
);
2641 /* empty the hash table and free the memory */
2643 cds_lfht_for_each_entry(relay_connections_ht
->ht
, &iter
.iter
, node
, node
) {
2644 health_code_update();
2646 node
= lttng_ht_iter_get_node_ulong(&iter
);
2648 relay_connection
= caa_container_of(node
,
2649 struct relay_command
, sock_n
);
2650 relay_del_connection(relay_connections_ht
,
2651 &iter
, relay_connection
, sessions_ht
);
2656 lttng_ht_destroy(indexes_ht
);
2658 lttng_ht_destroy(relay_connections_ht
);
2659 relay_connections_ht_error
:
2660 /* Close relay cmd pipes */
2661 utils_close_pipe(relay_cmd_pipe
);
2663 DBG("Thread exited with error");
2665 DBG("Worker thread cleanup complete");
2669 ERR("Health error occurred in %s", __func__
);
2671 health_unregister(health_relayd
);
2672 rcu_unregister_thread();
2678 * Create the relay command pipe to wake thread_manage_apps.
2679 * Closed in cleanup().
2681 static int create_relay_cmd_pipe(void)
2685 ret
= utils_create_pipe_cloexec(relay_cmd_pipe
);
2693 int main(int argc
, char **argv
)
2697 struct relay_local_data
*relay_ctx
;
2699 /* Create thread quit pipe */
2700 if ((ret
= init_thread_quit_pipe()) < 0) {
2704 /* Parse arguments */
2706 if ((ret
= set_options(argc
, argv
)) < 0) {
2710 if ((ret
= set_signal_handler()) < 0) {
2714 /* Try to create directory if -o, --output is specified. */
2715 if (opt_output_path
) {
2716 if (*opt_output_path
!= '/') {
2717 ERR("Please specify an absolute path for -o, --output PATH");
2721 ret
= utils_mkdir_recursive(opt_output_path
, S_IRWXU
| S_IRWXG
);
2723 ERR("Unable to create %s", opt_output_path
);
2737 /* We need those values for the file/dir creation. */
2738 relayd_uid
= getuid();
2739 relayd_gid
= getgid();
2741 /* Check if daemon is UID = 0 */
2742 if (relayd_uid
== 0) {
2743 if (control_uri
->port
< 1024 || data_uri
->port
< 1024 || live_uri
->port
< 1024) {
2744 ERR("Need to be root to use ports < 1024");
2750 /* Setup the thread apps communication pipe. */
2751 if ((ret
= create_relay_cmd_pipe()) < 0) {
2755 /* Init relay command queue. */
2756 cds_wfq_init(&relay_cmd_queue
.queue
);
2758 /* Set up max poll set size */
2759 lttng_poll_set_max_size();
2761 /* Initialize communication library */
2764 relay_ctx
= zmalloc(sizeof(struct relay_local_data
));
2766 PERROR("relay_ctx");
2770 /* tables of sessions indexed by session ID */
2771 relay_ctx
->sessions_ht
= lttng_ht_new(0, LTTNG_HT_TYPE_ULONG
);
2772 if (!relay_ctx
->sessions_ht
) {
2773 goto exit_relay_ctx_sessions
;
2776 /* tables of streams indexed by stream ID */
2777 relay_streams_ht
= lttng_ht_new(0, LTTNG_HT_TYPE_ULONG
);
2778 if (!relay_streams_ht
) {
2779 goto exit_relay_ctx_streams
;
2782 /* tables of streams indexed by stream ID */
2783 viewer_streams_ht
= lttng_ht_new(0, LTTNG_HT_TYPE_U64
);
2784 if (!viewer_streams_ht
) {
2785 goto exit_relay_ctx_viewer_streams
;
2788 /* Initialize thread health monitoring */
2789 health_relayd
= health_app_create(NR_HEALTH_RELAYD_TYPES
);
2790 if (!health_relayd
) {
2791 PERROR("health_app_create error");
2792 goto exit_health_app_create
;
2795 ret
= utils_create_pipe(health_quit_pipe
);
2797 goto error_health_pipe
;
2800 /* Create thread to manage the client socket */
2801 ret
= pthread_create(&health_thread
, NULL
,
2802 thread_manage_health
, (void *) NULL
);
2804 PERROR("pthread_create health");
2808 /* Setup the dispatcher thread */
2809 ret
= pthread_create(&dispatcher_thread
, NULL
,
2810 relay_thread_dispatcher
, (void *) NULL
);
2812 PERROR("pthread_create dispatcher");
2813 goto exit_dispatcher
;
2816 /* Setup the worker thread */
2817 ret
= pthread_create(&worker_thread
, NULL
,
2818 relay_thread_worker
, (void *) relay_ctx
);
2820 PERROR("pthread_create worker");
2824 /* Setup the listener thread */
2825 ret
= pthread_create(&listener_thread
, NULL
,
2826 relay_thread_listener
, (void *) NULL
);
2828 PERROR("pthread_create listener");
2832 ret
= live_start_threads(live_uri
, relay_ctx
, thread_quit_pipe
);
2834 ERR("Starting live viewer threads");
2839 ret
= pthread_join(listener_thread
, &status
);
2841 PERROR("pthread_join");
2842 goto error
; /* join error, exit without cleanup */
2846 ret
= pthread_join(worker_thread
, &status
);
2848 PERROR("pthread_join");
2849 goto error
; /* join error, exit without cleanup */
2853 ret
= pthread_join(dispatcher_thread
, &status
);
2855 PERROR("pthread_join");
2856 goto error
; /* join error, exit without cleanup */
2860 ret
= pthread_join(health_thread
, &status
);
2862 PERROR("pthread_join health thread");
2863 goto error
; /* join error, exit without cleanup */
2867 * Stop live threads only after joining other threads.
2869 live_stop_threads();
2872 utils_close_pipe(health_quit_pipe
);
2875 health_app_destroy(health_relayd
);
2877 exit_health_app_create
:
2878 lttng_ht_destroy(viewer_streams_ht
);
2880 exit_relay_ctx_viewer_streams
:
2881 lttng_ht_destroy(relay_streams_ht
);
2883 exit_relay_ctx_streams
:
2884 lttng_ht_destroy(relay_ctx
->sessions_ht
);
2886 exit_relay_ctx_sessions
: