2 * Copyright (C) 2012 - Julien Desfossez <jdesfossez@efficios.com>
3 * David Goulet <dgoulet@efficios.com>
4 * 2013 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 * 2015 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License, version 2 only,
9 * as published by the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 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>
43 #include <lttng/lttng.h>
44 #include <common/common.h>
45 #include <common/compat/poll.h>
46 #include <common/compat/socket.h>
47 #include <common/compat/endian.h>
48 #include <common/compat/getenv.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/session-config.h>
58 #include <urcu/rculist.h>
61 #include "ctf-trace.h"
64 #include "lttng-relayd.h"
66 #include "health-relayd.h"
67 #include "testpoint.h"
68 #include "viewer-stream.h"
71 #include "connection.h"
72 #include "tracefile-array.h"
73 #include "tcp_keep_alive.h"
75 static const char *help_msg
=
76 #ifdef LTTNG_EMBED_HELP
77 #include <lttng-relayd.8.h>
83 /* command line options */
84 char *opt_output_path
;
85 static int opt_daemon
, opt_background
;
86 static int opt_allow_clear
= 1;
89 * We need to wait for listener and live listener threads, as well as
90 * health check thread, before being ready to signal readiness.
92 #define NR_LTTNG_RELAY_READY 3
93 static int lttng_relay_ready
= NR_LTTNG_RELAY_READY
;
95 /* Size of receive buffer. */
96 #define RECV_DATA_BUFFER_SIZE 65536
98 static int recv_child_signal
; /* Set to 1 when a SIGUSR1 signal is received. */
99 static pid_t child_ppid
; /* Internal parent PID use with daemonize. */
101 static struct lttng_uri
*control_uri
;
102 static struct lttng_uri
*data_uri
;
103 static struct lttng_uri
*live_uri
;
105 const char *progname
;
107 const char *tracing_group_name
= DEFAULT_TRACING_GROUP
;
108 static int tracing_group_name_override
;
110 const char * const config_section_name
= "relayd";
113 * Quit pipe for all threads. This permits a single cancellation point
114 * for all threads when receiving an event on the pipe.
116 int thread_quit_pipe
[2] = { -1, -1 };
119 * This pipe is used to inform the worker thread that a command is queued and
120 * ready to be processed.
122 static int relay_conn_pipe
[2] = { -1, -1 };
124 /* Shared between threads */
125 static int dispatch_thread_exit
;
127 static pthread_t listener_thread
;
128 static pthread_t dispatcher_thread
;
129 static pthread_t worker_thread
;
130 static pthread_t health_thread
;
133 * last_relay_stream_id_lock protects last_relay_stream_id increment
134 * atomicity on 32-bit architectures.
136 static pthread_mutex_t last_relay_stream_id_lock
= PTHREAD_MUTEX_INITIALIZER
;
137 static uint64_t last_relay_stream_id
;
140 * Relay command queue.
142 * The relay_thread_listener and relay_thread_dispatcher communicate with this
145 static struct relay_conn_queue relay_conn_queue
;
147 /* buffer allocated at startup, used to store the trace data */
148 static char *data_buffer
;
149 static unsigned int data_buffer_size
;
151 /* Global relay stream hash table. */
152 struct lttng_ht
*relay_streams_ht
;
154 /* Global relay viewer stream hash table. */
155 struct lttng_ht
*viewer_streams_ht
;
157 /* Global relay sessions hash table. */
158 struct lttng_ht
*sessions_ht
;
160 /* Relayd health monitoring */
161 struct health_app
*health_relayd
;
163 static struct option long_options
[] = {
164 { "control-port", 1, 0, 'C', },
165 { "data-port", 1, 0, 'D', },
166 { "live-port", 1, 0, 'L', },
167 { "daemonize", 0, 0, 'd', },
168 { "background", 0, 0, 'b', },
169 { "group", 1, 0, 'g', },
170 { "help", 0, 0, 'h', },
171 { "output", 1, 0, 'o', },
172 { "verbose", 0, 0, 'v', },
173 { "config", 1, 0, 'f' },
174 { "version", 0, 0, 'V' },
175 { "disallow-clear", 0, 0, 'x' },
179 static const char *config_ignore_options
[] = { "help", "config", "version" };
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.
187 static int set_option(int opt
, const char *arg
, const char *optname
)
193 fprintf(stderr
, "option %s", optname
);
195 fprintf(stderr
, " with arg %s\n", arg
);
199 if (lttng_is_setuid_setgid()) {
200 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
201 "-C, --control-port");
203 ret
= uri_parse(arg
, &control_uri
);
205 ERR("Invalid control URI specified");
208 if (control_uri
->port
== 0) {
209 control_uri
->port
= DEFAULT_NETWORK_CONTROL_PORT
;
214 if (lttng_is_setuid_setgid()) {
215 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
218 ret
= uri_parse(arg
, &data_uri
);
220 ERR("Invalid data URI specified");
223 if (data_uri
->port
== 0) {
224 data_uri
->port
= DEFAULT_NETWORK_DATA_PORT
;
229 if (lttng_is_setuid_setgid()) {
230 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
233 ret
= uri_parse(arg
, &live_uri
);
235 ERR("Invalid live URI specified");
238 if (live_uri
->port
== 0) {
239 live_uri
->port
= DEFAULT_NETWORK_VIEWER_PORT
;
250 if (lttng_is_setuid_setgid()) {
251 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
254 tracing_group_name
= strdup(arg
);
255 if (tracing_group_name
== NULL
) {
260 tracing_group_name_override
= 1;
264 ret
= utils_show_help(8, "lttng-relayd", help_msg
);
266 ERR("Cannot show --help for `lttng-relayd`");
271 fprintf(stdout
, "%s\n", VERSION
);
274 if (lttng_is_setuid_setgid()) {
275 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
278 ret
= asprintf(&opt_output_path
, "%s", arg
);
281 PERROR("asprintf opt_output_path");
287 /* Verbose level can increase using multiple -v */
289 lttng_opt_verbose
= config_parse_value(arg
);
291 /* Only 3 level of verbosity (-vvv). */
292 if (lttng_opt_verbose
< 3) {
293 lttng_opt_verbose
+= 1;
302 /* Unknown option or other error.
303 * Error is printed by getopt, just return */
316 * config_entry_handler_cb used to handle options read from a config file.
317 * See config_entry_handler_cb comment in common/config/session-config.h for the
318 * return value conventions.
320 static int config_entry_handler(const struct config_entry
*entry
, void *unused
)
324 if (!entry
|| !entry
->name
|| !entry
->value
) {
329 /* Check if the option is to be ignored */
330 for (i
= 0; i
< sizeof(config_ignore_options
) / sizeof(char *); i
++) {
331 if (!strcmp(entry
->name
, config_ignore_options
[i
])) {
336 for (i
= 0; i
< (sizeof(long_options
) / sizeof(struct option
)) - 1; i
++) {
337 /* Ignore if entry name is not fully matched. */
338 if (strcmp(entry
->name
, long_options
[i
].name
)) {
343 * If the option takes no argument on the command line,
344 * we have to check if the value is "true". We support
345 * non-zero numeric values, true, on and yes.
347 if (!long_options
[i
].has_arg
) {
348 ret
= config_parse_value(entry
->value
);
351 WARN("Invalid configuration value \"%s\" for option %s",
352 entry
->value
, entry
->name
);
354 /* False, skip boolean config option. */
359 ret
= set_option(long_options
[i
].val
, entry
->value
, entry
->name
);
363 WARN("Unrecognized option \"%s\" in daemon configuration file.",
370 static int set_options(int argc
, char **argv
)
372 int c
, ret
= 0, option_index
= 0, retval
= 0;
373 int orig_optopt
= optopt
, orig_optind
= optind
;
374 char *default_address
, *optstring
;
375 const char *config_path
= NULL
;
376 const char *value
= NULL
;
378 optstring
= utils_generate_optstring(long_options
,
379 sizeof(long_options
) / sizeof(struct option
));
385 /* Check for the --config option */
387 while ((c
= getopt_long(argc
, argv
, optstring
, long_options
,
388 &option_index
)) != -1) {
392 } else if (c
!= 'f') {
396 if (lttng_is_setuid_setgid()) {
397 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
400 config_path
= utils_expand_path(optarg
);
402 ERR("Failed to resolve path: %s", optarg
);
407 ret
= config_get_section_entries(config_path
, config_section_name
,
408 config_entry_handler
, NULL
);
411 ERR("Invalid configuration option at line %i", ret
);
417 /* Reset getopt's global state */
418 optopt
= orig_optopt
;
419 optind
= orig_optind
;
421 c
= getopt_long(argc
, argv
, optstring
, long_options
, &option_index
);
426 ret
= set_option(c
, optarg
, long_options
[option_index
].name
);
433 /* assign default values */
434 if (control_uri
== NULL
) {
435 ret
= asprintf(&default_address
,
436 "tcp://" DEFAULT_NETWORK_CONTROL_BIND_ADDRESS
":%d",
437 DEFAULT_NETWORK_CONTROL_PORT
);
439 PERROR("asprintf default data address");
444 ret
= uri_parse(default_address
, &control_uri
);
445 free(default_address
);
447 ERR("Invalid control URI specified");
452 if (data_uri
== NULL
) {
453 ret
= asprintf(&default_address
,
454 "tcp://" DEFAULT_NETWORK_DATA_BIND_ADDRESS
":%d",
455 DEFAULT_NETWORK_DATA_PORT
);
457 PERROR("asprintf default data address");
462 ret
= uri_parse(default_address
, &data_uri
);
463 free(default_address
);
465 ERR("Invalid data URI specified");
470 if (live_uri
== NULL
) {
471 ret
= asprintf(&default_address
,
472 "tcp://" DEFAULT_NETWORK_VIEWER_BIND_ADDRESS
":%d",
473 DEFAULT_NETWORK_VIEWER_PORT
);
475 PERROR("asprintf default viewer control address");
480 ret
= uri_parse(default_address
, &live_uri
);
481 free(default_address
);
483 ERR("Invalid viewer control URI specified");
489 if (opt_allow_clear
) {
490 /* Check if env variable exists. */
491 value
= lttng_secure_getenv(DEFAULT_LTTNG_RELAYD_DISALLOW_CLEAR_ENV
);
493 ret
= config_parse_value(value
);
495 ERR("Invalid value for %s specified", DEFAULT_LTTNG_RELAYD_DISALLOW_CLEAR_ENV
);
499 opt_allow_clear
= !ret
;
508 static void print_global_objects(void)
510 rcu_register_thread();
512 print_viewer_streams();
513 print_relay_streams();
516 rcu_unregister_thread();
522 static void relayd_cleanup(void)
524 print_global_objects();
528 if (viewer_streams_ht
)
529 lttng_ht_destroy(viewer_streams_ht
);
530 if (relay_streams_ht
)
531 lttng_ht_destroy(relay_streams_ht
);
533 lttng_ht_destroy(sessions_ht
);
535 /* free the dynamically allocated opt_output_path */
536 free(opt_output_path
);
538 /* Close thread quit pipes */
539 utils_close_pipe(thread_quit_pipe
);
541 uri_free(control_uri
);
543 /* Live URI is freed in the live thread. */
545 if (tracing_group_name_override
) {
546 free((void *) tracing_group_name
);
551 * Write to writable pipe used to notify a thread.
553 static int notify_thread_pipe(int wpipe
)
557 ret
= lttng_write(wpipe
, "!", 1);
559 PERROR("write poll pipe");
567 static int notify_health_quit_pipe(int *pipe
)
571 ret
= lttng_write(pipe
[1], "4", 1);
573 PERROR("write relay health quit");
582 * Stop all relayd and relayd-live threads.
584 int lttng_relay_stop_threads(void)
588 /* Stopping all threads */
589 DBG("Terminating all threads");
590 if (notify_thread_pipe(thread_quit_pipe
[1])) {
591 ERR("write error on thread quit pipe");
595 if (notify_health_quit_pipe(health_quit_pipe
)) {
596 ERR("write error on health quit pipe");
599 /* Dispatch thread */
600 CMM_STORE_SHARED(dispatch_thread_exit
, 1);
601 futex_nto1_wake(&relay_conn_queue
.futex
);
603 if (relayd_live_stop()) {
604 ERR("Error stopping live threads");
611 * Signal handler for the daemon
613 * Simply stop all worker threads, leaving main() return gracefully after
614 * joining all threads and calling cleanup().
616 static void sighandler(int sig
)
620 DBG("SIGINT caught");
621 if (lttng_relay_stop_threads()) {
622 ERR("Error stopping threads");
626 DBG("SIGTERM caught");
627 if (lttng_relay_stop_threads()) {
628 ERR("Error stopping threads");
632 CMM_STORE_SHARED(recv_child_signal
, 1);
640 * Setup signal handler for :
641 * SIGINT, SIGTERM, SIGPIPE
643 static int set_signal_handler(void)
649 if ((ret
= sigemptyset(&sigset
)) < 0) {
650 PERROR("sigemptyset");
657 sa
.sa_handler
= sighandler
;
658 if ((ret
= sigaction(SIGTERM
, &sa
, NULL
)) < 0) {
663 if ((ret
= sigaction(SIGINT
, &sa
, NULL
)) < 0) {
668 if ((ret
= sigaction(SIGUSR1
, &sa
, NULL
)) < 0) {
673 sa
.sa_handler
= SIG_IGN
;
674 if ((ret
= sigaction(SIGPIPE
, &sa
, NULL
)) < 0) {
679 DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT");
684 void lttng_relay_notify_ready(void)
686 /* Notify the parent of the fork() process that we are ready. */
687 if (opt_daemon
|| opt_background
) {
688 if (uatomic_sub_return(<tng_relay_ready
, 1) == 0) {
689 kill(child_ppid
, SIGUSR1
);
695 * Init thread quit pipe.
697 * Return -1 on error or 0 if all pipes are created.
699 static int init_thread_quit_pipe(void)
703 ret
= utils_create_pipe_cloexec(thread_quit_pipe
);
709 * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set.
711 static int create_thread_poll_set(struct lttng_poll_event
*events
, int size
)
715 if (events
== NULL
|| size
== 0) {
720 ret
= lttng_poll_create(events
, size
, LTTNG_CLOEXEC
);
726 ret
= lttng_poll_add(events
, thread_quit_pipe
[0], LPOLLIN
| LPOLLERR
);
738 * Check if the thread quit pipe was triggered.
740 * Return 1 if it was triggered else 0;
742 static int check_thread_quit_pipe(int fd
, uint32_t events
)
744 if (fd
== thread_quit_pipe
[0] && (events
& LPOLLIN
)) {
752 * Create and init socket from uri.
754 static struct lttcomm_sock
*relay_socket_create(struct lttng_uri
*uri
)
757 struct lttcomm_sock
*sock
= NULL
;
759 sock
= lttcomm_alloc_sock_from_uri(uri
);
761 ERR("Allocating socket");
765 ret
= lttcomm_create_sock(sock
);
769 DBG("Listening on sock %d", sock
->fd
);
771 ret
= sock
->ops
->bind(sock
);
773 PERROR("Failed to bind socket");
777 ret
= sock
->ops
->listen(sock
, -1);
787 lttcomm_destroy_sock(sock
);
793 * This thread manages the listening for new connections on the network
795 static void *relay_thread_listener(void *data
)
797 int i
, ret
, pollfd
, err
= -1;
798 uint32_t revents
, nb_fd
;
799 struct lttng_poll_event events
;
800 struct lttcomm_sock
*control_sock
, *data_sock
;
802 DBG("[thread] Relay listener started");
804 health_register(health_relayd
, HEALTH_RELAYD_TYPE_LISTENER
);
806 health_code_update();
808 control_sock
= relay_socket_create(control_uri
);
810 goto error_sock_control
;
813 data_sock
= relay_socket_create(data_uri
);
815 goto error_sock_relay
;
819 * Pass 3 as size here for the thread quit pipe, control and
822 ret
= create_thread_poll_set(&events
, 3);
824 goto error_create_poll
;
827 /* Add the control socket */
828 ret
= lttng_poll_add(&events
, control_sock
->fd
, LPOLLIN
| LPOLLRDHUP
);
833 /* Add the data socket */
834 ret
= lttng_poll_add(&events
, data_sock
->fd
, LPOLLIN
| LPOLLRDHUP
);
839 lttng_relay_notify_ready();
841 if (testpoint(relayd_thread_listener
)) {
842 goto error_testpoint
;
846 health_code_update();
848 DBG("Listener accepting connections");
852 ret
= lttng_poll_wait(&events
, -1);
856 * Restart interrupted system call.
858 if (errno
== EINTR
) {
866 DBG("Relay new connection received");
867 for (i
= 0; i
< nb_fd
; i
++) {
868 health_code_update();
870 /* Fetch once the poll data */
871 revents
= LTTNG_POLL_GETEV(&events
, i
);
872 pollfd
= LTTNG_POLL_GETFD(&events
, i
);
876 * No activity for this FD (poll
882 /* Thread quit pipe has been closed. Killing thread. */
883 ret
= check_thread_quit_pipe(pollfd
, revents
);
889 if (revents
& LPOLLIN
) {
891 * A new connection is requested, therefore a
892 * sessiond/consumerd connection is allocated in
893 * this thread, enqueued to a global queue and
894 * dequeued (and freed) in the worker thread.
897 struct relay_connection
*new_conn
;
898 struct lttcomm_sock
*newsock
;
899 enum connection_type type
;
901 if (pollfd
== data_sock
->fd
) {
903 newsock
= data_sock
->ops
->accept(data_sock
);
904 DBG("Relay data connection accepted, socket %d",
907 assert(pollfd
== control_sock
->fd
);
908 type
= RELAY_CONTROL
;
909 newsock
= control_sock
->ops
->accept(control_sock
);
910 DBG("Relay control connection accepted, socket %d",
914 PERROR("accepting sock");
918 ret
= setsockopt(newsock
->fd
, SOL_SOCKET
, SO_REUSEADDR
, &val
,
921 PERROR("setsockopt inet");
922 lttcomm_destroy_sock(newsock
);
926 ret
= socket_apply_keep_alive_config(newsock
->fd
);
928 ERR("Failed to apply TCP keep-alive configuration on socket (%i)",
930 lttcomm_destroy_sock(newsock
);
934 new_conn
= connection_create(newsock
, type
);
936 lttcomm_destroy_sock(newsock
);
940 /* Enqueue request for the dispatcher thread. */
941 cds_wfcq_enqueue(&relay_conn_queue
.head
, &relay_conn_queue
.tail
,
945 * Wake the dispatch queue futex.
946 * Implicit memory barrier with the
947 * exchange in cds_wfcq_enqueue.
949 futex_nto1_wake(&relay_conn_queue
.futex
);
950 } else if (revents
& (LPOLLERR
| LPOLLHUP
| LPOLLRDHUP
)) {
951 ERR("socket poll error");
954 ERR("Unexpected poll events %u for sock %d", revents
, pollfd
);
964 lttng_poll_clean(&events
);
966 if (data_sock
->fd
>= 0) {
967 ret
= data_sock
->ops
->close(data_sock
);
972 lttcomm_destroy_sock(data_sock
);
974 if (control_sock
->fd
>= 0) {
975 ret
= control_sock
->ops
->close(control_sock
);
980 lttcomm_destroy_sock(control_sock
);
984 ERR("Health error occurred in %s", __func__
);
986 health_unregister(health_relayd
);
987 DBG("Relay listener thread cleanup complete");
988 lttng_relay_stop_threads();
993 * This thread manages the dispatching of the requests to worker threads
995 static void *relay_thread_dispatcher(void *data
)
999 struct cds_wfcq_node
*node
;
1000 struct relay_connection
*new_conn
= NULL
;
1002 DBG("[thread] Relay dispatcher started");
1004 health_register(health_relayd
, HEALTH_RELAYD_TYPE_DISPATCHER
);
1006 if (testpoint(relayd_thread_dispatcher
)) {
1007 goto error_testpoint
;
1010 health_code_update();
1013 health_code_update();
1015 /* Atomically prepare the queue futex */
1016 futex_nto1_prepare(&relay_conn_queue
.futex
);
1018 if (CMM_LOAD_SHARED(dispatch_thread_exit
)) {
1023 health_code_update();
1025 /* Dequeue commands */
1026 node
= cds_wfcq_dequeue_blocking(&relay_conn_queue
.head
,
1027 &relay_conn_queue
.tail
);
1029 DBG("Woken up but nothing in the relay command queue");
1030 /* Continue thread execution */
1033 new_conn
= caa_container_of(node
, struct relay_connection
, qnode
);
1035 DBG("Dispatching request waiting on sock %d", new_conn
->sock
->fd
);
1038 * Inform worker thread of the new request. This
1039 * call is blocking so we can be assured that
1040 * the data will be read at some point in time
1041 * or wait to the end of the world :)
1043 ret
= lttng_write(relay_conn_pipe
[1], &new_conn
, sizeof(new_conn
));
1045 PERROR("write connection pipe");
1046 connection_put(new_conn
);
1049 } while (node
!= NULL
);
1051 /* Futex wait on queue. Blocking call on futex() */
1052 health_poll_entry();
1053 futex_nto1_wait(&relay_conn_queue
.futex
);
1057 /* Normal exit, no error */
1064 ERR("Health error occurred in %s", __func__
);
1066 health_unregister(health_relayd
);
1067 DBG("Dispatch thread dying");
1068 lttng_relay_stop_threads();
1073 * Set index data from the control port to a given index object.
1075 static int set_index_control_data(struct relay_index
*index
,
1076 struct lttcomm_relayd_index
*data
,
1077 struct relay_connection
*conn
)
1079 struct ctf_packet_index index_data
;
1082 * The index on disk is encoded in big endian, so we don't need
1083 * to convert the data received on the network. The data_offset
1084 * value is NEVER modified here and is updated by the data
1087 index_data
.packet_size
= data
->packet_size
;
1088 index_data
.content_size
= data
->content_size
;
1089 index_data
.timestamp_begin
= data
->timestamp_begin
;
1090 index_data
.timestamp_end
= data
->timestamp_end
;
1091 index_data
.events_discarded
= data
->events_discarded
;
1092 index_data
.stream_id
= data
->stream_id
;
1094 if (conn
->minor
>= 8) {
1095 index
->index_data
.stream_instance_id
= data
->stream_instance_id
;
1096 index
->index_data
.packet_seq_num
= data
->packet_seq_num
;
1099 return relay_index_set_data(index
, &index_data
);
1103 * Handle the RELAYD_CREATE_SESSION command.
1105 * On success, send back the session id or else return a negative value.
1107 static int relay_create_session(struct lttcomm_relayd_hdr
*recv_hdr
,
1108 struct relay_connection
*conn
)
1110 int ret
= 0, send_ret
;
1111 struct relay_session
*session
;
1112 struct lttcomm_relayd_status_session reply
;
1113 char session_name
[LTTNG_NAME_MAX
];
1114 char hostname
[LTTNG_HOST_NAME_MAX
];
1115 uint32_t live_timer
= 0;
1116 bool snapshot
= false;
1118 memset(session_name
, 0, LTTNG_NAME_MAX
);
1119 memset(hostname
, 0, LTTNG_HOST_NAME_MAX
);
1121 memset(&reply
, 0, sizeof(reply
));
1123 switch (conn
->minor
) {
1128 case 4: /* LTTng sessiond 2.4 */
1130 ret
= cmd_create_session_2_4(conn
, session_name
,
1131 hostname
, &live_timer
, &snapshot
);
1137 session
= session_create(session_name
, hostname
, live_timer
,
1138 snapshot
, conn
->major
, conn
->minor
);
1143 assert(!conn
->session
);
1144 conn
->session
= session
;
1145 DBG("Created session %" PRIu64
, session
->id
);
1147 reply
.session_id
= htobe64(session
->id
);
1151 reply
.ret_code
= htobe32(LTTNG_ERR_FATAL
);
1153 reply
.ret_code
= htobe32(LTTNG_OK
);
1156 send_ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
1158 ERR("Relayd sending session id");
1166 * When we have received all the streams and the metadata for a channel,
1167 * we make them visible to the viewer threads.
1169 static void publish_connection_local_streams(struct relay_connection
*conn
)
1171 struct relay_stream
*stream
;
1172 struct relay_session
*session
= conn
->session
;
1175 * We publish all streams belonging to a session atomically wrt
1178 pthread_mutex_lock(&session
->lock
);
1180 cds_list_for_each_entry_rcu(stream
, &session
->recv_list
,
1182 stream_publish(stream
);
1187 * Inform the viewer that there are new streams in the session.
1189 if (session
->viewer_attached
) {
1190 uatomic_set(&session
->new_streams
, 1);
1192 pthread_mutex_unlock(&session
->lock
);
1196 * relay_add_stream: allocate a new stream for a session
1198 static int relay_add_stream(struct lttcomm_relayd_hdr
*recv_hdr
,
1199 struct relay_connection
*conn
)
1203 struct relay_session
*session
= conn
->session
;
1204 struct relay_stream
*stream
= NULL
;
1205 struct lttcomm_relayd_status_stream reply
;
1206 struct ctf_trace
*trace
= NULL
;
1207 uint64_t stream_handle
= -1ULL;
1208 char *path_name
= NULL
, *channel_name
= NULL
;
1209 uint64_t tracefile_size
= 0, tracefile_count
= 0;
1211 if (!session
|| conn
->version_check_done
== 0) {
1212 ERR("Trying to add a stream before version check");
1214 goto end_no_session
;
1217 switch (session
->minor
) {
1218 case 1: /* LTTng sessiond 2.1. Allocates path_name and channel_name. */
1219 ret
= cmd_recv_stream_2_1(conn
, &path_name
,
1222 case 2: /* LTTng sessiond 2.2. Allocates path_name and channel_name. */
1224 ret
= cmd_recv_stream_2_2(conn
, &path_name
,
1225 &channel_name
, &tracefile_size
, &tracefile_count
);
1232 trace
= ctf_trace_get_by_path_or_create(session
, path_name
);
1236 /* This stream here has one reference on the trace. */
1238 pthread_mutex_lock(&last_relay_stream_id_lock
);
1239 stream_handle
= ++last_relay_stream_id
;
1240 pthread_mutex_unlock(&last_relay_stream_id_lock
);
1242 /* We pass ownership of path_name and channel_name. */
1243 stream
= stream_create(trace
, stream_handle
, path_name
,
1244 channel_name
, tracefile_size
, tracefile_count
);
1246 channel_name
= NULL
;
1249 * Streams are the owners of their trace. Reference to trace is
1250 * kept within stream_create().
1252 ctf_trace_put(trace
);
1255 memset(&reply
, 0, sizeof(reply
));
1256 reply
.handle
= htobe64(stream_handle
);
1258 reply
.ret_code
= htobe32(LTTNG_ERR_UNK
);
1260 reply
.ret_code
= htobe32(LTTNG_OK
);
1263 send_ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
,
1264 sizeof(struct lttcomm_relayd_status_stream
), 0);
1266 ERR("Relay sending stream id");
1267 ret
= (int) send_ret
;
1277 * relay_close_stream: close a specific stream
1279 static int relay_close_stream(struct lttcomm_relayd_hdr
*recv_hdr
,
1280 struct relay_connection
*conn
)
1283 struct relay_session
*session
= conn
->session
;
1284 struct lttcomm_relayd_close_stream stream_info
;
1285 struct lttcomm_relayd_generic_reply reply
;
1286 struct relay_stream
*stream
;
1288 DBG("Close stream received");
1290 if (!session
|| conn
->version_check_done
== 0) {
1291 ERR("Trying to close a stream before version check");
1293 goto end_no_session
;
1296 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &stream_info
,
1297 sizeof(struct lttcomm_relayd_close_stream
), 0);
1298 if (ret
< sizeof(struct lttcomm_relayd_close_stream
)) {
1300 /* Orderly shutdown. Not necessary to print an error. */
1301 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1303 ERR("Relay didn't receive valid add_stream struct size : %d", ret
);
1306 goto end_no_session
;
1309 stream
= stream_get_by_id(be64toh(stream_info
.stream_id
));
1316 * Set last_net_seq_num before the close flag. Required by data
1319 pthread_mutex_lock(&stream
->lock
);
1320 stream
->last_net_seq_num
= be64toh(stream_info
.last_net_seq_num
);
1321 pthread_mutex_unlock(&stream
->lock
);
1324 * This is one of the conditions which may trigger a stream close
1325 * with the others being:
1326 * 1) A close command is received for a stream
1327 * 2) The control connection owning the stream is closed
1328 * 3) We have received all of the stream's data _after_ a close
1331 try_stream_close(stream
);
1332 if (stream
->is_metadata
) {
1333 struct relay_viewer_stream
*vstream
;
1335 vstream
= viewer_stream_get_by_id(stream
->stream_handle
);
1337 if (vstream
->metadata_sent
== stream
->metadata_received
) {
1339 * Since all the metadata has been sent to the
1340 * viewer and that we have a request to close
1341 * its stream, we can safely teardown the
1342 * corresponding metadata viewer stream.
1344 viewer_stream_put(vstream
);
1346 /* Put local reference. */
1347 viewer_stream_put(vstream
);
1353 memset(&reply
, 0, sizeof(reply
));
1355 reply
.ret_code
= htobe32(LTTNG_ERR_UNK
);
1357 reply
.ret_code
= htobe32(LTTNG_OK
);
1359 send_ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
,
1360 sizeof(struct lttcomm_relayd_generic_reply
), 0);
1362 ERR("Relay sending stream id");
1371 * relay_reset_metadata: reset a metadata stream
1374 int relay_reset_metadata(struct lttcomm_relayd_hdr
*recv_hdr
,
1375 struct relay_connection
*conn
)
1378 struct relay_session
*session
= conn
->session
;
1379 struct lttcomm_relayd_reset_metadata stream_info
;
1380 struct lttcomm_relayd_generic_reply reply
;
1381 struct relay_stream
*stream
;
1383 DBG("Reset metadata received");
1385 if (!session
|| conn
->version_check_done
== 0) {
1386 ERR("Trying to reset a metadata stream before version check");
1388 goto end_no_session
;
1391 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &stream_info
,
1392 sizeof(struct lttcomm_relayd_reset_metadata
), 0);
1393 if (ret
< sizeof(struct lttcomm_relayd_reset_metadata
)) {
1395 /* Orderly shutdown. Not necessary to print an error. */
1396 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1398 ERR("Relay didn't receive valid reset_metadata struct "
1402 goto end_no_session
;
1404 DBG("Update metadata to version %" PRIu64
, be64toh(stream_info
.version
));
1406 /* Unsupported for live sessions for now. */
1407 if (session
->live_timer
!= 0) {
1412 stream
= stream_get_by_id(be64toh(stream_info
.stream_id
));
1417 pthread_mutex_lock(&stream
->lock
);
1418 if (!stream
->is_metadata
) {
1423 ret
= utils_rotate_stream_file(stream
->path_name
, stream
->channel_name
,
1424 0, 0, -1, -1, stream
->stream_fd
->fd
, NULL
,
1425 &stream
->stream_fd
->fd
);
1427 ERR("Failed to rotate metadata file %s of channel %s",
1428 stream
->path_name
, stream
->channel_name
);
1433 pthread_mutex_unlock(&stream
->lock
);
1437 memset(&reply
, 0, sizeof(reply
));
1439 reply
.ret_code
= htobe32(LTTNG_ERR_UNK
);
1441 reply
.ret_code
= htobe32(LTTNG_OK
);
1443 send_ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
,
1444 sizeof(struct lttcomm_relayd_generic_reply
), 0);
1446 ERR("Relay sending reset metadata reply");
1455 * relay_clear_session: clear all data files belonging to a session.
1458 int relay_clear_session(const struct lttcomm_relayd_hdr
*recv_hdr
,
1459 struct relay_connection
*conn
)
1463 struct relay_session
*session
= conn
->session
;
1464 struct lttcomm_relayd_generic_reply reply
;
1466 DBG("Clear session received");
1468 if (!session
|| !conn
->version_check_done
) {
1469 ERR("Trying to clear session before version check");
1471 goto end_no_session
;
1474 if (!opt_allow_clear
) {
1475 ERR("Trying to clear session, but clear is disallowed.");
1477 goto end_no_session
;
1479 ret
= session_clear(session
);
1481 memset(&reply
, 0, sizeof(reply
));
1483 reply
.ret_code
= htobe32(LTTNG_ERR_UNK
);
1485 reply
.ret_code
= htobe32(LTTNG_OK
);
1487 send_ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
,
1488 sizeof(struct lttcomm_relayd_generic_reply
), 0);
1489 if (send_ret
< (ssize_t
) sizeof(reply
)) {
1490 ERR("Failed to send \"clear session\" command reply (ret = %zd)",
1500 * relay_unknown_command: send -1 if received unknown command
1502 static void relay_unknown_command(struct relay_connection
*conn
)
1504 struct lttcomm_relayd_generic_reply reply
;
1507 memset(&reply
, 0, sizeof(reply
));
1508 reply
.ret_code
= htobe32(LTTNG_ERR_UNK
);
1509 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
,
1510 sizeof(struct lttcomm_relayd_generic_reply
), 0);
1512 ERR("Relay sending unknown command");
1517 * relay_start: send an acknowledgment to the client to tell if we are
1518 * ready to receive data. We are ready if a session is established.
1520 static int relay_start(struct lttcomm_relayd_hdr
*recv_hdr
,
1521 struct relay_connection
*conn
)
1523 int ret
= htobe32(LTTNG_OK
);
1524 struct lttcomm_relayd_generic_reply reply
;
1525 struct relay_session
*session
= conn
->session
;
1528 DBG("Trying to start the streaming without a session established");
1529 ret
= htobe32(LTTNG_ERR_UNK
);
1532 memset(&reply
, 0, sizeof(reply
));
1533 reply
.ret_code
= ret
;
1534 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
,
1535 sizeof(struct lttcomm_relayd_generic_reply
), 0);
1537 ERR("Relay sending start ack");
1544 * Append padding to the file pointed by the file descriptor fd.
1546 static int write_padding_to_file(int fd
, uint32_t size
)
1555 zeros
= zmalloc(size
);
1556 if (zeros
== NULL
) {
1557 PERROR("zmalloc zeros for padding");
1562 ret
= lttng_write(fd
, zeros
, size
);
1564 PERROR("write padding to file");
1574 * relay_recv_metadata: receive the metadata for the session.
1576 static int relay_recv_metadata(struct lttcomm_relayd_hdr
*recv_hdr
,
1577 struct relay_connection
*conn
)
1581 struct relay_session
*session
= conn
->session
;
1582 struct lttcomm_relayd_metadata_payload
*metadata_struct
;
1583 struct relay_stream
*metadata_stream
;
1584 uint64_t data_size
, payload_size
;
1587 ERR("Metadata sent before version check");
1592 data_size
= payload_size
= be64toh(recv_hdr
->data_size
);
1593 if (data_size
< sizeof(struct lttcomm_relayd_metadata_payload
)) {
1594 ERR("Incorrect data size");
1598 payload_size
-= sizeof(struct lttcomm_relayd_metadata_payload
);
1600 if (data_buffer_size
< data_size
) {
1601 /* In case the realloc fails, we can free the memory */
1604 tmp_data_ptr
= realloc(data_buffer
, data_size
);
1605 if (!tmp_data_ptr
) {
1606 ERR("Allocating data buffer");
1611 data_buffer
= tmp_data_ptr
;
1612 data_buffer_size
= data_size
;
1614 memset(data_buffer
, 0, data_size
);
1615 DBG2("Relay receiving metadata, waiting for %" PRIu64
" bytes", data_size
);
1616 size_ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, data_buffer
, data_size
, 0);
1617 if (size_ret
< 0 || size_ret
!= data_size
) {
1618 if (size_ret
== 0) {
1619 /* Orderly shutdown. Not necessary to print an error. */
1620 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1622 ERR("Relay didn't receive the whole metadata");
1627 metadata_struct
= (struct lttcomm_relayd_metadata_payload
*) data_buffer
;
1629 metadata_stream
= stream_get_by_id(be64toh(metadata_struct
->stream_id
));
1630 if (!metadata_stream
) {
1635 pthread_mutex_lock(&metadata_stream
->lock
);
1637 size_ret
= lttng_write(metadata_stream
->stream_fd
->fd
, metadata_struct
->payload
,
1639 if (size_ret
< payload_size
) {
1640 ERR("Relay error writing metadata on file");
1645 size_ret
= write_padding_to_file(metadata_stream
->stream_fd
->fd
,
1646 be32toh(metadata_struct
->padding_size
));
1651 metadata_stream
->metadata_received
+=
1652 payload_size
+ be32toh(metadata_struct
->padding_size
);
1653 DBG2("Relay metadata written. Updated metadata_received %" PRIu64
,
1654 metadata_stream
->metadata_received
);
1657 pthread_mutex_unlock(&metadata_stream
->lock
);
1658 stream_put(metadata_stream
);
1664 * relay_send_version: send relayd version number
1666 static int relay_send_version(struct lttcomm_relayd_hdr
*recv_hdr
,
1667 struct relay_connection
*conn
)
1670 struct lttcomm_relayd_version reply
, msg
;
1671 bool compatible
= true;
1673 conn
->version_check_done
= 1;
1675 /* Get version from the other side. */
1676 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &msg
, sizeof(msg
), 0);
1677 if (ret
< 0 || ret
!= sizeof(msg
)) {
1679 /* Orderly shutdown. Not necessary to print an error. */
1680 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1682 ERR("Relay failed to receive the version values.");
1688 memset(&reply
, 0, sizeof(reply
));
1689 reply
.major
= RELAYD_VERSION_COMM_MAJOR
;
1690 reply
.minor
= RELAYD_VERSION_COMM_MINOR
;
1692 /* Major versions must be the same */
1693 if (reply
.major
!= be32toh(msg
.major
)) {
1694 DBG("Incompatible major versions (%u vs %u), deleting session",
1695 reply
.major
, be32toh(msg
.major
));
1699 conn
->major
= reply
.major
;
1700 /* We adapt to the lowest compatible version */
1701 if (reply
.minor
<= be32toh(msg
.minor
)) {
1702 conn
->minor
= reply
.minor
;
1704 conn
->minor
= be32toh(msg
.minor
);
1707 reply
.major
= htobe32(reply
.major
);
1708 reply
.minor
= htobe32(reply
.minor
);
1709 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
,
1710 sizeof(struct lttcomm_relayd_version
), 0);
1712 ERR("Relay sending version");
1720 DBG("Version check done using protocol %u.%u", conn
->major
,
1728 * Check for data pending for a given stream id from the session daemon.
1730 static int relay_data_pending(struct lttcomm_relayd_hdr
*recv_hdr
,
1731 struct relay_connection
*conn
)
1733 struct relay_session
*session
= conn
->session
;
1734 struct lttcomm_relayd_data_pending msg
;
1735 struct lttcomm_relayd_generic_reply reply
;
1736 struct relay_stream
*stream
;
1738 uint64_t last_net_seq_num
, stream_id
;
1740 DBG("Data pending command received");
1742 if (!session
|| conn
->version_check_done
== 0) {
1743 ERR("Trying to check for data before version check");
1745 goto end_no_session
;
1748 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &msg
, sizeof(msg
), 0);
1749 if (ret
< sizeof(msg
)) {
1751 /* Orderly shutdown. Not necessary to print an error. */
1752 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1754 ERR("Relay didn't receive valid data_pending struct size : %d",
1758 goto end_no_session
;
1761 stream_id
= be64toh(msg
.stream_id
);
1762 last_net_seq_num
= be64toh(msg
.last_net_seq_num
);
1764 stream
= stream_get_by_id(stream_id
);
1765 if (stream
== NULL
) {
1770 pthread_mutex_lock(&stream
->lock
);
1772 DBG("Data pending for stream id %" PRIu64
" prev_seq %" PRIu64
1773 " and last_seq %" PRIu64
, stream_id
, stream
->prev_seq
,
1776 /* Avoid wrapping issue */
1777 if (((int64_t) (stream
->prev_seq
- last_net_seq_num
)) >= 0) {
1778 /* Data has in fact been written and is NOT pending */
1781 /* Data still being streamed thus pending */
1785 stream
->data_pending_check_done
= true;
1786 pthread_mutex_unlock(&stream
->lock
);
1791 memset(&reply
, 0, sizeof(reply
));
1792 reply
.ret_code
= htobe32(ret
);
1793 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
1795 ERR("Relay data pending ret code failed");
1803 * Wait for the control socket to reach a quiescent state.
1805 * Note that for now, when receiving this command from the session
1806 * daemon, this means that every subsequent commands or data received on
1807 * the control socket has been handled. So, this is why we simply return
1810 static int relay_quiescent_control(struct lttcomm_relayd_hdr
*recv_hdr
,
1811 struct relay_connection
*conn
)
1815 struct relay_stream
*stream
;
1816 struct lttcomm_relayd_quiescent_control msg
;
1817 struct lttcomm_relayd_generic_reply reply
;
1819 DBG("Checking quiescent state on control socket");
1821 if (!conn
->session
|| conn
->version_check_done
== 0) {
1822 ERR("Trying to check for data before version check");
1824 goto end_no_session
;
1827 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &msg
, sizeof(msg
), 0);
1828 if (ret
< sizeof(msg
)) {
1830 /* Orderly shutdown. Not necessary to print an error. */
1831 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1833 ERR("Relay didn't receive valid begin data_pending struct size: %d",
1837 goto end_no_session
;
1840 stream_id
= be64toh(msg
.stream_id
);
1841 stream
= stream_get_by_id(stream_id
);
1845 pthread_mutex_lock(&stream
->lock
);
1846 stream
->data_pending_check_done
= true;
1847 pthread_mutex_unlock(&stream
->lock
);
1848 DBG("Relay quiescent control pending flag set to %" PRIu64
, stream_id
);
1851 memset(&reply
, 0, sizeof(reply
));
1852 reply
.ret_code
= htobe32(LTTNG_OK
);
1853 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
1855 ERR("Relay data quiescent control ret code failed");
1863 * Initialize a data pending command. This means that a consumer is about
1864 * to ask for data pending for each stream it holds. Simply iterate over
1865 * all streams of a session and set the data_pending_check_done flag.
1867 * This command returns to the client a LTTNG_OK code.
1869 static int relay_begin_data_pending(struct lttcomm_relayd_hdr
*recv_hdr
,
1870 struct relay_connection
*conn
)
1873 struct lttng_ht_iter iter
;
1874 struct lttcomm_relayd_begin_data_pending msg
;
1875 struct lttcomm_relayd_generic_reply reply
;
1876 struct relay_stream
*stream
;
1877 uint64_t session_id
;
1882 DBG("Init streams for data pending");
1884 if (!conn
->session
|| conn
->version_check_done
== 0) {
1885 ERR("Trying to check for data before version check");
1887 goto end_no_session
;
1890 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &msg
, sizeof(msg
), 0);
1891 if (ret
< sizeof(msg
)) {
1893 /* Orderly shutdown. Not necessary to print an error. */
1894 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1896 ERR("Relay didn't receive valid begin data_pending struct size: %d",
1900 goto end_no_session
;
1903 session_id
= be64toh(msg
.session_id
);
1906 * Iterate over all streams to set the begin data pending flag.
1907 * For now, the streams are indexed by stream handle so we have
1908 * to iterate over all streams to find the one associated with
1909 * the right session_id.
1912 cds_lfht_for_each_entry(relay_streams_ht
->ht
, &iter
.iter
, stream
,
1914 if (!stream_get(stream
)) {
1917 if (stream
->trace
->session
->id
== session_id
) {
1918 pthread_mutex_lock(&stream
->lock
);
1919 stream
->data_pending_check_done
= false;
1920 pthread_mutex_unlock(&stream
->lock
);
1921 DBG("Set begin data pending flag to stream %" PRIu64
,
1922 stream
->stream_handle
);
1928 memset(&reply
, 0, sizeof(reply
));
1929 /* All good, send back reply. */
1930 reply
.ret_code
= htobe32(LTTNG_OK
);
1932 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
1934 ERR("Relay begin data pending send reply failed");
1942 * End data pending command. This will check, for a given session id, if
1943 * each stream associated with it has its data_pending_check_done flag
1944 * set. If not, this means that the client lost track of the stream but
1945 * the data is still being streamed on our side. In this case, we inform
1946 * the client that data is in flight.
1948 * Return to the client if there is data in flight or not with a ret_code.
1950 static int relay_end_data_pending(struct lttcomm_relayd_hdr
*recv_hdr
,
1951 struct relay_connection
*conn
)
1954 struct lttng_ht_iter iter
;
1955 struct lttcomm_relayd_end_data_pending msg
;
1956 struct lttcomm_relayd_generic_reply reply
;
1957 struct relay_stream
*stream
;
1958 uint64_t session_id
;
1959 uint32_t is_data_inflight
= 0;
1961 DBG("End data pending command");
1963 if (!conn
->session
|| conn
->version_check_done
== 0) {
1964 ERR("Trying to check for data before version check");
1966 goto end_no_session
;
1969 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &msg
, sizeof(msg
), 0);
1970 if (ret
< sizeof(msg
)) {
1972 /* Orderly shutdown. Not necessary to print an error. */
1973 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1975 ERR("Relay didn't receive valid end data_pending struct size: %d",
1979 goto end_no_session
;
1982 session_id
= be64toh(msg
.session_id
);
1985 * Iterate over all streams to see if the begin data pending
1989 cds_lfht_for_each_entry(relay_streams_ht
->ht
, &iter
.iter
, stream
,
1991 if (!stream_get(stream
)) {
1994 if (stream
->trace
->session
->id
!= session_id
) {
1998 pthread_mutex_lock(&stream
->lock
);
1999 if (!stream
->data_pending_check_done
) {
2000 if (!stream
->closed
|| !(((int64_t) (stream
->prev_seq
- stream
->last_net_seq_num
)) >= 0)) {
2001 is_data_inflight
= 1;
2002 DBG("Data is still in flight for stream %" PRIu64
,
2003 stream
->stream_handle
);
2004 pthread_mutex_unlock(&stream
->lock
);
2009 pthread_mutex_unlock(&stream
->lock
);
2014 memset(&reply
, 0, sizeof(reply
));
2015 /* All good, send back reply. */
2016 reply
.ret_code
= htobe32(is_data_inflight
);
2018 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
2020 ERR("Relay end data pending send reply failed");
2028 * Receive an index for a specific stream.
2030 * Return 0 on success else a negative value.
2032 static int relay_recv_index(struct lttcomm_relayd_hdr
*recv_hdr
,
2033 struct relay_connection
*conn
)
2036 struct relay_session
*session
= conn
->session
;
2037 struct lttcomm_relayd_index index_info
;
2038 struct relay_index
*index
;
2039 struct lttcomm_relayd_generic_reply reply
;
2040 struct relay_stream
*stream
;
2041 uint64_t net_seq_num
;
2046 DBG("Relay receiving index");
2048 if (!session
|| conn
->version_check_done
== 0) {
2049 ERR("Trying to close a stream before version check");
2051 goto end_no_session
;
2054 msg_len
= lttcomm_relayd_index_len(
2055 lttng_to_index_major(conn
->major
, conn
->minor
),
2056 lttng_to_index_minor(conn
->major
, conn
->minor
));
2057 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &index_info
,
2059 if (ret
< msg_len
) {
2061 /* Orderly shutdown. Not necessary to print an error. */
2062 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
2064 ERR("Relay didn't receive valid index struct size : %d", ret
);
2067 goto end_no_session
;
2070 net_seq_num
= be64toh(index_info
.net_seq_num
);
2072 stream
= stream_get_by_id(be64toh(index_info
.relay_stream_id
));
2074 ERR("stream_get_by_id not found");
2078 pthread_mutex_lock(&stream
->lock
);
2080 /* Live beacon handling */
2081 if (index_info
.packet_size
== 0) {
2082 DBG("Received live beacon for stream %" PRIu64
,
2083 stream
->stream_handle
);
2086 * Only flag a stream inactive when it has already
2087 * received data and no indexes are in flight.
2089 if (stream
->index_received_seqcount
> 0
2090 && stream
->indexes_in_flight
== 0) {
2091 stream
->beacon_ts_end
=
2092 be64toh(index_info
.timestamp_end
);
2095 goto end_stream_put
;
2097 DBG("Received index for stream %" PRIu64
,
2098 stream
->stream_handle
);
2099 stream
->beacon_ts_end
= -1ULL;
2102 if (stream
->ctf_stream_id
== -1ULL) {
2103 stream
->ctf_stream_id
= be64toh(index_info
.stream_id
);
2105 index
= relay_index_get_by_id_or_create(stream
, net_seq_num
);
2108 ERR("relay_index_get_by_id_or_create index NULL");
2109 goto end_stream_put
;
2111 if (set_index_control_data(index
, &index_info
, conn
)) {
2112 ERR("set_index_control_data error");
2113 relay_index_put(index
);
2115 goto end_stream_put
;
2117 ret
= relay_index_try_flush(index
);
2119 tracefile_array_commit_seq(stream
->tfa
, stream
->index_received_seqcount
);
2120 stream
->index_received_seqcount
++;
2121 /* Clear index and data file(s) if reaching the clear position. */
2122 ret
= try_stream_clear_index_data(stream
);
2124 goto end_stream_put
;
2126 } else if (ret
> 0) {
2133 * relay_index_try_flush is responsible for the self-reference
2134 * put of the index object on error.
2136 ERR("relay_index_try_flush error %d", ret
);
2139 stream
->prev_index_seq
= net_seq_num
;
2142 pthread_mutex_unlock(&stream
->lock
);
2147 memset(&reply
, 0, sizeof(reply
));
2149 reply
.ret_code
= htobe32(LTTNG_ERR_UNK
);
2151 reply
.ret_code
= htobe32(LTTNG_OK
);
2153 send_ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
2155 ERR("Relay sending close index id reply");
2164 * Receive the streams_sent message.
2166 * Return 0 on success else a negative value.
2168 static int relay_streams_sent(struct lttcomm_relayd_hdr
*recv_hdr
,
2169 struct relay_connection
*conn
)
2172 struct lttcomm_relayd_generic_reply reply
;
2176 DBG("Relay receiving streams_sent");
2178 if (!conn
->session
|| conn
->version_check_done
== 0) {
2179 ERR("Trying to close a stream before version check");
2181 goto end_no_session
;
2185 * Publish every pending stream in the connection recv list which are
2186 * now ready to be used by the viewer.
2188 publish_connection_local_streams(conn
);
2190 memset(&reply
, 0, sizeof(reply
));
2191 reply
.ret_code
= htobe32(LTTNG_OK
);
2192 send_ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
2194 ERR("Relay sending sent_stream reply");
2206 * Process the commands received on the control socket
2208 static int relay_process_control(struct lttcomm_relayd_hdr
*recv_hdr
,
2209 struct relay_connection
*conn
)
2213 switch (be32toh(recv_hdr
->cmd
)) {
2214 case RELAYD_CREATE_SESSION
:
2215 ret
= relay_create_session(recv_hdr
, conn
);
2217 case RELAYD_ADD_STREAM
:
2218 ret
= relay_add_stream(recv_hdr
, conn
);
2220 case RELAYD_START_DATA
:
2221 ret
= relay_start(recv_hdr
, conn
);
2223 case RELAYD_SEND_METADATA
:
2224 ret
= relay_recv_metadata(recv_hdr
, conn
);
2226 case RELAYD_VERSION
:
2227 ret
= relay_send_version(recv_hdr
, conn
);
2229 case RELAYD_CLOSE_STREAM
:
2230 ret
= relay_close_stream(recv_hdr
, conn
);
2232 case RELAYD_DATA_PENDING
:
2233 ret
= relay_data_pending(recv_hdr
, conn
);
2235 case RELAYD_QUIESCENT_CONTROL
:
2236 ret
= relay_quiescent_control(recv_hdr
, conn
);
2238 case RELAYD_BEGIN_DATA_PENDING
:
2239 ret
= relay_begin_data_pending(recv_hdr
, conn
);
2241 case RELAYD_END_DATA_PENDING
:
2242 ret
= relay_end_data_pending(recv_hdr
, conn
);
2244 case RELAYD_SEND_INDEX
:
2245 ret
= relay_recv_index(recv_hdr
, conn
);
2247 case RELAYD_STREAMS_SENT
:
2248 ret
= relay_streams_sent(recv_hdr
, conn
);
2250 case RELAYD_RESET_METADATA
:
2251 ret
= relay_reset_metadata(recv_hdr
, conn
);
2253 case RELAYD_CLEAR_SESSION_CUSTOM_EFFICIOS
:
2254 ret
= relay_clear_session(recv_hdr
, conn
);
2256 case RELAYD_UPDATE_SYNC_INFO
:
2258 ERR("Received unknown command (%u)", be32toh(recv_hdr
->cmd
));
2259 relay_unknown_command(conn
);
2269 * Handle index for a data stream.
2271 * Called with the stream lock held.
2273 * Return 0 on success else a negative value.
2275 static int handle_index_data(struct relay_stream
*stream
, uint64_t net_seq_num
,
2279 uint64_t data_offset
;
2280 struct relay_index
*index
;
2282 /* Get data offset because we are about to update the index. */
2283 data_offset
= htobe64(stream
->tracefile_size_current
);
2285 DBG("handle_index_data: stream %" PRIu64
" net_seq_num %" PRIu64
" data offset %" PRIu64
,
2286 stream
->stream_handle
, net_seq_num
, stream
->tracefile_size_current
);
2289 * Lookup for an existing index for that stream id/sequence
2290 * number. If it exists, the control thread has already received the
2291 * data for it, thus we need to write it to disk.
2293 index
= relay_index_get_by_id_or_create(stream
, net_seq_num
);
2299 if (rotate_index
|| !stream
->index_file
) {
2300 uint32_t major
, minor
;
2302 /* Put ref on previous index_file. */
2303 if (stream
->index_file
) {
2304 lttng_index_file_put(stream
->index_file
);
2305 stream
->index_file
= NULL
;
2307 major
= stream
->trace
->session
->major
;
2308 minor
= stream
->trace
->session
->minor
;
2309 stream
->index_file
= lttng_index_file_create(stream
->path_name
,
2310 stream
->channel_name
,
2311 -1, -1, stream
->tracefile_size
,
2312 tracefile_array_get_file_index_head(stream
->tfa
),
2313 lttng_to_index_major(major
, minor
),
2314 lttng_to_index_minor(major
, minor
));
2315 if (!stream
->index_file
) {
2317 /* Put self-ref for this index due to error. */
2318 relay_index_put(index
);
2324 if (relay_index_set_file(index
, stream
->index_file
, data_offset
)) {
2326 /* Put self-ref for this index due to error. */
2327 relay_index_put(index
);
2332 ret
= relay_index_try_flush(index
);
2334 tracefile_array_commit_seq(stream
->tfa
, stream
->index_received_seqcount
);
2335 stream
->index_received_seqcount
++;
2336 /* Clear index and data file(s) if reaching the clear position. */
2337 ret
= try_stream_clear_index_data(stream
);
2341 } else if (ret
> 0) {
2348 * relay_index_try_flush is responsible for the self-reference
2349 * put of the index object on error.
2351 ERR("relay_index_try_flush error %d", ret
);
2359 * relay_process_data: Process the data received on the data socket
2361 static int relay_process_data(struct relay_connection
*conn
)
2363 int ret
= 0, rotate_index
= 0;
2365 struct relay_stream
*stream
;
2366 struct lttcomm_relayd_data_hdr data_hdr
;
2368 uint64_t net_seq_num
;
2370 struct relay_session
*session
;
2371 bool new_stream
= false, close_requested
= false;
2372 size_t chunk_size
= RECV_DATA_BUFFER_SIZE
;
2373 size_t recv_off
= 0;
2374 char data_buffer
[chunk_size
];
2376 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &data_hdr
,
2377 sizeof(struct lttcomm_relayd_data_hdr
), 0);
2380 /* Orderly shutdown. Not necessary to print an error. */
2381 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
2383 ERR("Unable to receive data header on sock %d", conn
->sock
->fd
);
2389 stream_id
= be64toh(data_hdr
.stream_id
);
2390 stream
= stream_get_by_id(stream_id
);
2392 ERR("relay_process_data: Cannot find stream %" PRIu64
, stream_id
);
2396 session
= stream
->trace
->session
;
2397 data_size
= be32toh(data_hdr
.data_size
);
2399 net_seq_num
= be64toh(data_hdr
.net_seq_num
);
2401 DBG("Receiving data of size %u for stream id %" PRIu64
" seqnum %" PRIu64
,
2402 data_size
, stream_id
, net_seq_num
);
2404 pthread_mutex_lock(&stream
->lock
);
2406 /* Check if a rotation is needed. */
2407 if (stream
->tracefile_size
> 0 &&
2408 (stream
->tracefile_size_current
+ data_size
) >
2409 stream
->tracefile_size
) {
2410 uint64_t old_id
, new_id
;
2412 old_id
= tracefile_array_get_file_index_head(stream
->tfa
);
2413 tracefile_array_file_rotate(stream
->tfa
);
2415 /* new_id is updated by utils_rotate_stream_file. */
2418 ret
= utils_rotate_stream_file(stream
->path_name
,
2419 stream
->channel_name
, stream
->tracefile_size
,
2420 stream
->tracefile_count
, -1,
2421 -1, stream
->stream_fd
->fd
,
2422 &new_id
, &stream
->stream_fd
->fd
);
2424 ERR("Rotating stream output file");
2425 goto end_stream_unlock
;
2428 * Reset current size because we just performed a stream
2431 stream
->tracefile_size_current
= 0;
2432 stream
->tracefile_count_current
= new_id
;
2437 * Index are handled in protocol version 2.4 and above. Also,
2438 * snapshot and index are NOT supported.
2440 if (session
->minor
>= 4 && !session
->snapshot
) {
2441 ret
= handle_index_data(stream
, net_seq_num
, rotate_index
);
2443 ERR("handle_index_data: fail stream %" PRIu64
" net_seq_num %" PRIu64
" ret %d",
2444 stream
->stream_handle
, net_seq_num
, ret
);
2445 goto end_stream_unlock
;
2449 for (recv_off
= 0; recv_off
< data_size
; recv_off
+= chunk_size
) {
2450 size_t recv_size
= min(data_size
- recv_off
, chunk_size
);
2452 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, data_buffer
, recv_size
, 0);
2455 /* Orderly shutdown. Not necessary to print an error. */
2456 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
2458 ERR("Socket %d error %d", conn
->sock
->fd
, ret
);
2461 goto end_stream_unlock
;
2464 /* Write data to stream output fd. */
2465 size_ret
= lttng_write(stream
->stream_fd
->fd
, data_buffer
,
2467 if (size_ret
< recv_size
) {
2468 ERR("Relay error writing data to file");
2470 goto end_stream_unlock
;
2473 DBG2("Relay wrote %zd bytes to tracefile for stream id %" PRIu64
,
2474 size_ret
, stream
->stream_handle
);
2477 ret
= write_padding_to_file(stream
->stream_fd
->fd
,
2478 be32toh(data_hdr
.padding_size
));
2480 ERR("write_padding_to_file: fail stream %" PRIu64
" net_seq_num %" PRIu64
" ret %d",
2481 stream
->stream_handle
, net_seq_num
, ret
);
2482 goto end_stream_unlock
;
2484 stream
->tracefile_size_current
+=
2485 data_size
+ be32toh(data_hdr
.padding_size
);
2486 if (stream
->prev_seq
== -1ULL) {
2490 stream
->prev_seq
= net_seq_num
;
2493 close_requested
= stream
->close_requested
;
2494 pthread_mutex_unlock(&stream
->lock
);
2495 if (close_requested
) {
2496 try_stream_close(stream
);
2500 pthread_mutex_lock(&session
->lock
);
2501 uatomic_set(&session
->new_streams
, 1);
2502 pthread_mutex_unlock(&session
->lock
);
2509 static void cleanup_connection_pollfd(struct lttng_poll_event
*events
, int pollfd
)
2513 (void) lttng_poll_del(events
, pollfd
);
2515 ret
= close(pollfd
);
2517 ERR("Closing pollfd %d", pollfd
);
2521 static void relay_thread_close_connection(struct lttng_poll_event
*events
,
2522 int pollfd
, struct relay_connection
*conn
)
2524 const char *type_str
;
2526 switch (conn
->type
) {
2531 type_str
= "Control";
2533 case RELAY_VIEWER_COMMAND
:
2534 type_str
= "Viewer Command";
2536 case RELAY_VIEWER_NOTIFICATION
:
2537 type_str
= "Viewer Notification";
2540 type_str
= "Unknown";
2542 cleanup_connection_pollfd(events
, pollfd
);
2543 connection_put(conn
);
2544 DBG("%s connection closed with %d", type_str
, pollfd
);
2548 * This thread does the actual work
2550 static void *relay_thread_worker(void *data
)
2552 int ret
, err
= -1, last_seen_data_fd
= -1;
2554 struct lttng_poll_event events
;
2555 struct lttng_ht
*relay_connections_ht
;
2556 struct lttng_ht_iter iter
;
2557 struct lttcomm_relayd_hdr recv_hdr
;
2558 struct relay_connection
*destroy_conn
= NULL
;
2560 DBG("[thread] Relay worker started");
2562 rcu_register_thread();
2564 health_register(health_relayd
, HEALTH_RELAYD_TYPE_WORKER
);
2566 if (testpoint(relayd_thread_worker
)) {
2567 goto error_testpoint
;
2570 health_code_update();
2572 /* table of connections indexed on socket */
2573 relay_connections_ht
= lttng_ht_new(0, LTTNG_HT_TYPE_ULONG
);
2574 if (!relay_connections_ht
) {
2575 goto relay_connections_ht_error
;
2578 ret
= create_thread_poll_set(&events
, 2);
2580 goto error_poll_create
;
2583 ret
= lttng_poll_add(&events
, relay_conn_pipe
[0], LPOLLIN
| LPOLLRDHUP
);
2590 int idx
= -1, i
, seen_control
= 0, last_notdel_data_fd
= -1;
2592 health_code_update();
2594 /* Infinite blocking call, waiting for transmission */
2595 DBG3("Relayd worker thread polling...");
2596 health_poll_entry();
2597 ret
= lttng_poll_wait(&events
, -1);
2601 * Restart interrupted system call.
2603 if (errno
== EINTR
) {
2612 * Process control. The control connection is
2613 * prioritized so we don't starve it with high
2614 * throughput tracing data on the data connection.
2616 for (i
= 0; i
< nb_fd
; i
++) {
2617 /* Fetch once the poll data */
2618 uint32_t revents
= LTTNG_POLL_GETEV(&events
, i
);
2619 int pollfd
= LTTNG_POLL_GETFD(&events
, i
);
2621 health_code_update();
2625 * No activity for this FD (poll
2631 /* Thread quit pipe has been closed. Killing thread. */
2632 ret
= check_thread_quit_pipe(pollfd
, revents
);
2638 /* Inspect the relay conn pipe for new connection */
2639 if (pollfd
== relay_conn_pipe
[0]) {
2640 if (revents
& LPOLLIN
) {
2641 struct relay_connection
*conn
;
2643 ret
= lttng_read(relay_conn_pipe
[0], &conn
, sizeof(conn
));
2647 lttng_poll_add(&events
, conn
->sock
->fd
,
2648 LPOLLIN
| LPOLLRDHUP
);
2649 connection_ht_add(relay_connections_ht
, conn
);
2650 DBG("Connection socket %d added", conn
->sock
->fd
);
2651 } else if (revents
& (LPOLLERR
| LPOLLHUP
| LPOLLRDHUP
)) {
2652 ERR("Relay connection pipe error");
2655 ERR("Unexpected poll events %u for sock %d", revents
, pollfd
);
2659 struct relay_connection
*ctrl_conn
;
2661 ctrl_conn
= connection_get_by_sock(relay_connections_ht
, pollfd
);
2662 /* If not found, there is a synchronization issue. */
2665 if (ctrl_conn
->type
== RELAY_DATA
) {
2666 if (revents
& LPOLLIN
) {
2668 * Flag the last seen data fd not deleted. It will be
2669 * used as the last seen fd if any fd gets deleted in
2672 last_notdel_data_fd
= pollfd
;
2674 goto put_ctrl_connection
;
2676 assert(ctrl_conn
->type
== RELAY_CONTROL
);
2678 if (revents
& LPOLLIN
) {
2679 ret
= ctrl_conn
->sock
->ops
->recvmsg(ctrl_conn
->sock
,
2680 &recv_hdr
, sizeof(recv_hdr
), 0);
2682 /* Connection closed */
2683 relay_thread_close_connection(&events
, pollfd
,
2686 ret
= relay_process_control(&recv_hdr
, ctrl_conn
);
2688 /* Clear the session on error. */
2689 relay_thread_close_connection(&events
,
2694 } else if (revents
& (LPOLLERR
| LPOLLHUP
| LPOLLRDHUP
)) {
2695 relay_thread_close_connection(&events
,
2697 if (last_seen_data_fd
== pollfd
) {
2698 last_seen_data_fd
= last_notdel_data_fd
;
2701 ERR("Unexpected poll events %u for control sock %d",
2703 connection_put(ctrl_conn
);
2706 put_ctrl_connection
:
2707 connection_put(ctrl_conn
);
2712 * The last loop handled a control request, go back to poll to make
2713 * sure we prioritise the control socket.
2719 if (last_seen_data_fd
>= 0) {
2720 for (i
= 0; i
< nb_fd
; i
++) {
2721 int pollfd
= LTTNG_POLL_GETFD(&events
, i
);
2723 health_code_update();
2725 if (last_seen_data_fd
== pollfd
) {
2732 /* Process data connection. */
2733 for (i
= idx
+ 1; i
< nb_fd
; i
++) {
2734 /* Fetch the poll data. */
2735 uint32_t revents
= LTTNG_POLL_GETEV(&events
, i
);
2736 int pollfd
= LTTNG_POLL_GETFD(&events
, i
);
2737 struct relay_connection
*data_conn
;
2739 health_code_update();
2742 /* No activity for this FD (poll implementation). */
2746 /* Skip the command pipe. It's handled in the first loop. */
2747 if (pollfd
== relay_conn_pipe
[0]) {
2751 data_conn
= connection_get_by_sock(relay_connections_ht
, pollfd
);
2753 /* Skip it. Might be removed before. */
2756 if (data_conn
->type
== RELAY_CONTROL
) {
2757 goto put_data_connection
;
2759 assert(data_conn
->type
== RELAY_DATA
);
2761 if (revents
& LPOLLIN
) {
2762 ret
= relay_process_data(data_conn
);
2763 /* Connection closed */
2765 relay_thread_close_connection(&events
, pollfd
,
2768 * Every goto restart call sets the last seen fd where
2769 * here we don't really care since we gracefully
2770 * continue the loop after the connection is deleted.
2773 /* Keep last seen port. */
2774 last_seen_data_fd
= pollfd
;
2775 connection_put(data_conn
);
2778 } else if (revents
& (LPOLLERR
| LPOLLHUP
| LPOLLRDHUP
)) {
2779 relay_thread_close_connection(&events
, pollfd
,
2782 ERR("Unknown poll events %u for data sock %d",
2785 put_data_connection
:
2786 connection_put(data_conn
);
2788 last_seen_data_fd
= -1;
2791 /* Normal exit, no error */
2796 /* Cleanup reamaining connection object. */
2798 cds_lfht_for_each_entry(relay_connections_ht
->ht
, &iter
.iter
,
2801 health_code_update();
2803 if (session_abort(destroy_conn
->session
)) {
2808 * No need to grab another ref, because we own
2811 relay_thread_close_connection(&events
, destroy_conn
->sock
->fd
,
2816 lttng_poll_clean(&events
);
2818 lttng_ht_destroy(relay_connections_ht
);
2819 relay_connections_ht_error
:
2820 /* Close relay conn pipes */
2821 utils_close_pipe(relay_conn_pipe
);
2823 DBG("Thread exited with error");
2825 DBG("Worker thread cleanup complete");
2829 ERR("Health error occurred in %s", __func__
);
2831 health_unregister(health_relayd
);
2832 rcu_unregister_thread();
2833 lttng_relay_stop_threads();
2838 * Create the relay command pipe to wake thread_manage_apps.
2839 * Closed in cleanup().
2841 static int create_relay_conn_pipe(void)
2845 ret
= utils_create_pipe_cloexec(relay_conn_pipe
);
2853 int main(int argc
, char **argv
)
2855 int ret
= 0, retval
= 0;
2858 /* Parse arguments */
2860 if (set_options(argc
, argv
)) {
2865 if (set_signal_handler()) {
2870 if (!opt_allow_clear
) {
2871 DBG("Clear command disallowed.");
2874 /* Try to create directory if -o, --output is specified. */
2875 if (opt_output_path
) {
2876 if (*opt_output_path
!= '/') {
2877 ERR("Please specify an absolute path for -o, --output PATH");
2882 ret
= utils_mkdir_recursive(opt_output_path
, S_IRWXU
| S_IRWXG
,
2885 ERR("Unable to create %s", opt_output_path
);
2892 if (opt_daemon
|| opt_background
) {
2895 ret
= lttng_daemonize(&child_ppid
, &recv_child_signal
,
2903 * We are in the child. Make sure all other file
2904 * descriptors are closed, in case we are called with
2905 * more opened file descriptors than the standard ones.
2907 for (i
= 3; i
< sysconf(_SC_OPEN_MAX
); i
++) {
2912 /* Initialize thread health monitoring */
2913 health_relayd
= health_app_create(NR_HEALTH_RELAYD_TYPES
);
2914 if (!health_relayd
) {
2915 PERROR("health_app_create error");
2917 goto exit_health_app_create
;
2920 /* Create thread quit pipe */
2921 if (init_thread_quit_pipe()) {
2923 goto exit_init_data
;
2926 /* Setup the thread apps communication pipe. */
2927 if (create_relay_conn_pipe()) {
2929 goto exit_init_data
;
2932 /* Init relay command queue. */
2933 cds_wfcq_init(&relay_conn_queue
.head
, &relay_conn_queue
.tail
);
2935 /* Initialize communication library */
2937 lttcomm_inet_init();
2939 /* tables of sessions indexed by session ID */
2940 sessions_ht
= lttng_ht_new(0, LTTNG_HT_TYPE_U64
);
2943 goto exit_init_data
;
2946 /* tables of streams indexed by stream ID */
2947 relay_streams_ht
= lttng_ht_new(0, LTTNG_HT_TYPE_U64
);
2948 if (!relay_streams_ht
) {
2950 goto exit_init_data
;
2953 /* tables of streams indexed by stream ID */
2954 viewer_streams_ht
= lttng_ht_new(0, LTTNG_HT_TYPE_U64
);
2955 if (!viewer_streams_ht
) {
2957 goto exit_init_data
;
2960 ret
= utils_create_pipe(health_quit_pipe
);
2963 goto exit_health_quit_pipe
;
2966 /* Create thread to manage the client socket */
2967 ret
= pthread_create(&health_thread
, default_pthread_attr(),
2968 thread_manage_health
, (void *) NULL
);
2971 PERROR("pthread_create health");
2973 goto exit_health_thread
;
2976 /* Setup the dispatcher thread */
2977 ret
= pthread_create(&dispatcher_thread
, default_pthread_attr(),
2978 relay_thread_dispatcher
, (void *) NULL
);
2981 PERROR("pthread_create dispatcher");
2983 goto exit_dispatcher_thread
;
2986 /* Setup the worker thread */
2987 ret
= pthread_create(&worker_thread
, default_pthread_attr(),
2988 relay_thread_worker
, NULL
);
2991 PERROR("pthread_create worker");
2993 goto exit_worker_thread
;
2996 /* Setup the listener thread */
2997 ret
= pthread_create(&listener_thread
, default_pthread_attr(),
2998 relay_thread_listener
, (void *) NULL
);
3001 PERROR("pthread_create listener");
3003 goto exit_listener_thread
;
3006 ret
= relayd_live_create(live_uri
);
3008 ERR("Starting live viewer threads");
3014 * This is where we start awaiting program completion (e.g. through
3015 * signal that asks threads to teardown).
3018 ret
= relayd_live_join();
3024 ret
= pthread_join(listener_thread
, &status
);
3027 PERROR("pthread_join listener_thread");
3031 exit_listener_thread
:
3032 ret
= pthread_join(worker_thread
, &status
);
3035 PERROR("pthread_join worker_thread");
3040 ret
= pthread_join(dispatcher_thread
, &status
);
3043 PERROR("pthread_join dispatcher_thread");
3046 exit_dispatcher_thread
:
3048 ret
= pthread_join(health_thread
, &status
);
3051 PERROR("pthread_join health_thread");
3056 utils_close_pipe(health_quit_pipe
);
3057 exit_health_quit_pipe
:
3060 health_app_destroy(health_relayd
);
3061 exit_health_app_create
:
3064 * Wait for all pending call_rcu work to complete before tearing
3065 * down data structures. call_rcu worker may be trying to
3066 * perform lookups in those structures.
3071 /* Ensure all prior call_rcu are done. */