2 * Copyright (C) 2012 - Julien Desfossez <jdesfossez@efficios.com>
3 * David Goulet <dgoulet@efficios.com>
4 * 2013 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License, version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
31 #include <sys/mount.h>
32 #include <sys/resource.h>
33 #include <sys/socket.h>
35 #include <sys/types.h>
38 #include <urcu/futex.h>
39 #include <urcu/uatomic.h>
44 #include <lttng/lttng.h>
45 #include <common/common.h>
46 #include <common/compat/poll.h>
47 #include <common/compat/socket.h>
48 #include <common/compat/endian.h>
49 #include <common/compat/getenv.h>
50 #include <common/defaults.h>
51 #include <common/daemonize.h>
52 #include <common/futex.h>
53 #include <common/sessiond-comm/sessiond-comm.h>
54 #include <common/sessiond-comm/inet.h>
55 #include <common/sessiond-comm/relayd.h>
56 #include <common/uri.h>
57 #include <common/utils.h>
58 #include <common/config/config.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"
73 /* command line options */
74 char *opt_output_path
;
75 static int opt_daemon
, opt_background
;
78 * We need to wait for listener and live listener threads, as well as
79 * health check thread, before being ready to signal readiness.
81 #define NR_LTTNG_RELAY_READY 3
82 static int lttng_relay_ready
= NR_LTTNG_RELAY_READY
;
83 static int recv_child_signal
; /* Set to 1 when a SIGUSR1 signal is received. */
84 static pid_t child_ppid
; /* Internal parent PID use with daemonize. */
86 static struct lttng_uri
*control_uri
;
87 static struct lttng_uri
*data_uri
;
88 static struct lttng_uri
*live_uri
;
92 const char *tracing_group_name
= DEFAULT_TRACING_GROUP
;
93 static int tracing_group_name_override
;
95 const char * const config_section_name
= "relayd";
98 * Quit pipe for all threads. This permits a single cancellation point
99 * for all threads when receiving an event on the pipe.
101 int thread_quit_pipe
[2] = { -1, -1 };
104 * This pipe is used to inform the worker thread that a command is queued and
105 * ready to be processed.
107 static int relay_conn_pipe
[2] = { -1, -1 };
109 /* Shared between threads */
110 static int dispatch_thread_exit
;
112 static pthread_t listener_thread
;
113 static pthread_t dispatcher_thread
;
114 static pthread_t worker_thread
;
115 static pthread_t health_thread
;
117 static uint64_t last_relay_stream_id
;
120 * Relay command queue.
122 * The relay_thread_listener and relay_thread_dispatcher communicate with this
125 static struct relay_conn_queue relay_conn_queue
;
127 /* buffer allocated at startup, used to store the trace data */
128 static char *data_buffer
;
129 static unsigned int data_buffer_size
;
131 /* We need those values for the file/dir creation. */
132 static uid_t relayd_uid
;
133 static gid_t relayd_gid
;
135 /* Global relay stream hash table. */
136 struct lttng_ht
*relay_streams_ht
;
138 /* Global relay viewer stream hash table. */
139 struct lttng_ht
*viewer_streams_ht
;
141 /* Global hash table that stores relay index object. */
142 struct lttng_ht
*indexes_ht
;
144 /* Relayd health monitoring */
145 struct health_app
*health_relayd
;
147 static struct option long_options
[] = {
148 { "control-port", 1, 0, 'C', },
149 { "data-port", 1, 0, 'D', },
150 { "live-port", 1, 0, 'L', },
151 { "daemonize", 0, 0, 'd', },
152 { "background", 0, 0, 'b', },
153 { "group", 1, 0, 'g', },
154 { "help", 0, 0, 'h', },
155 { "output", 1, 0, 'o', },
156 { "verbose", 0, 0, 'v', },
157 { "config", 1, 0, 'f' },
161 static const char *config_ignore_options
[] = { "help", "config" };
164 * usage function on stderr
169 fprintf(stderr
, "Usage: %s OPTIONS\n\nOptions:\n", progname
);
170 fprintf(stderr
, " -h, --help Display this usage.\n");
171 fprintf(stderr
, " -d, --daemonize Start as a daemon.\n");
172 fprintf(stderr
, " -b, --background Start as a daemon, keeping console open.\n");
173 fprintf(stderr
, " -C, --control-port URL Control port listening.\n");
174 fprintf(stderr
, " -D, --data-port URL Data port listening.\n");
175 fprintf(stderr
, " -L, --live-port URL Live view port listening.\n");
176 fprintf(stderr
, " -o, --output PATH Output path for traces. Must use an absolute path.\n");
177 fprintf(stderr
, " -v, --verbose Verbose mode. Activate DBG() macro.\n");
178 fprintf(stderr
, " -g, --group NAME Specify the tracing group name. (default: tracing)\n");
179 fprintf(stderr
, " -f --config Load daemon configuration file\n");
183 * Take an option from the getopt output and set it in the right variable to be
186 * Return 0 on success else a negative value.
189 int set_option(int opt
, const char *arg
, const char *optname
)
195 fprintf(stderr
, "option %s", optname
);
197 fprintf(stderr
, " with arg %s\n", arg
);
201 if (lttng_is_setuid_setgid()) {
202 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
203 "-C, --control-port");
205 ret
= uri_parse(arg
, &control_uri
);
207 ERR("Invalid control URI specified");
210 if (control_uri
->port
== 0) {
211 control_uri
->port
= DEFAULT_NETWORK_CONTROL_PORT
;
216 if (lttng_is_setuid_setgid()) {
217 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
220 ret
= uri_parse(arg
, &data_uri
);
222 ERR("Invalid data URI specified");
225 if (data_uri
->port
== 0) {
226 data_uri
->port
= DEFAULT_NETWORK_DATA_PORT
;
231 if (lttng_is_setuid_setgid()) {
232 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
235 ret
= uri_parse(arg
, &live_uri
);
237 ERR("Invalid live URI specified");
240 if (live_uri
->port
== 0) {
241 live_uri
->port
= DEFAULT_NETWORK_VIEWER_PORT
;
252 if (lttng_is_setuid_setgid()) {
253 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
256 tracing_group_name
= strdup(arg
);
257 if (tracing_group_name
== NULL
) {
262 tracing_group_name_override
= 1;
269 if (lttng_is_setuid_setgid()) {
270 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
273 ret
= asprintf(&opt_output_path
, "%s", arg
);
276 PERROR("asprintf opt_output_path");
282 /* Verbose level can increase using multiple -v */
284 lttng_opt_verbose
= config_parse_value(arg
);
286 /* Only 3 level of verbosity (-vvv). */
287 if (lttng_opt_verbose
< 3) {
288 lttng_opt_verbose
+= 1;
293 /* Unknown option or other error.
294 * Error is printed by getopt, just return */
307 * config_entry_handler_cb used to handle options read from a config file.
308 * See config_entry_handler_cb comment in common/config/config.h for the
309 * return value conventions.
312 int config_entry_handler(const struct config_entry
*entry
, void *unused
)
316 if (!entry
|| !entry
->name
|| !entry
->value
) {
321 /* Check if the option is to be ignored */
322 for (i
= 0; i
< sizeof(config_ignore_options
) / sizeof(char *); i
++) {
323 if (!strcmp(entry
->name
, config_ignore_options
[i
])) {
328 for (i
= 0; i
< (sizeof(long_options
) / sizeof(struct option
)) - 1; i
++) {
329 /* Ignore if entry name is not fully matched. */
330 if (strcmp(entry
->name
, long_options
[i
].name
)) {
335 * If the option takes no argument on the command line, we have to
336 * check if the value is "true". We support non-zero numeric values,
339 if (!long_options
[i
].has_arg
) {
340 ret
= config_parse_value(entry
->value
);
343 WARN("Invalid configuration value \"%s\" for option %s",
344 entry
->value
, entry
->name
);
346 /* False, skip boolean config option. */
351 ret
= set_option(long_options
[i
].val
, entry
->value
, entry
->name
);
355 WARN("Unrecognized option \"%s\" in daemon configuration file.",
363 int set_options(int argc
, char **argv
)
365 int c
, ret
= 0, option_index
= 0, retval
= 0;
366 int orig_optopt
= optopt
, orig_optind
= optind
;
367 char *default_address
, *optstring
;
368 const char *config_path
= NULL
;
370 optstring
= utils_generate_optstring(long_options
,
371 sizeof(long_options
) / sizeof(struct option
));
377 /* Check for the --config option */
379 while ((c
= getopt_long(argc
, argv
, optstring
, long_options
,
380 &option_index
)) != -1) {
384 } else if (c
!= 'f') {
388 if (lttng_is_setuid_setgid()) {
389 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
392 config_path
= utils_expand_path(optarg
);
394 ERR("Failed to resolve path: %s", optarg
);
399 ret
= config_get_section_entries(config_path
, config_section_name
,
400 config_entry_handler
, NULL
);
403 ERR("Invalid configuration option at line %i", ret
);
409 /* Reset getopt's global state */
410 optopt
= orig_optopt
;
411 optind
= orig_optind
;
413 c
= getopt_long(argc
, argv
, optstring
, long_options
, &option_index
);
418 ret
= set_option(c
, optarg
, long_options
[option_index
].name
);
425 /* assign default values */
426 if (control_uri
== NULL
) {
427 ret
= asprintf(&default_address
,
428 "tcp://" DEFAULT_NETWORK_CONTROL_BIND_ADDRESS
":%d",
429 DEFAULT_NETWORK_CONTROL_PORT
);
431 PERROR("asprintf default data address");
436 ret
= uri_parse(default_address
, &control_uri
);
437 free(default_address
);
439 ERR("Invalid control URI specified");
444 if (data_uri
== NULL
) {
445 ret
= asprintf(&default_address
,
446 "tcp://" DEFAULT_NETWORK_DATA_BIND_ADDRESS
":%d",
447 DEFAULT_NETWORK_DATA_PORT
);
449 PERROR("asprintf default data address");
454 ret
= uri_parse(default_address
, &data_uri
);
455 free(default_address
);
457 ERR("Invalid data URI specified");
462 if (live_uri
== NULL
) {
463 ret
= asprintf(&default_address
,
464 "tcp://" DEFAULT_NETWORK_VIEWER_BIND_ADDRESS
":%d",
465 DEFAULT_NETWORK_VIEWER_PORT
);
467 PERROR("asprintf default viewer control address");
472 ret
= uri_parse(default_address
, &live_uri
);
473 free(default_address
);
475 ERR("Invalid viewer control URI specified");
490 void relayd_cleanup(struct relay_local_data
*relay_ctx
)
494 if (viewer_streams_ht
)
495 lttng_ht_destroy(viewer_streams_ht
);
496 if (relay_streams_ht
)
497 lttng_ht_destroy(relay_streams_ht
);
498 if (relay_ctx
&& relay_ctx
->sessions_ht
)
499 lttng_ht_destroy(relay_ctx
->sessions_ht
);
502 /* free the dynamically allocated opt_output_path */
503 free(opt_output_path
);
505 /* Close thread quit pipes */
506 utils_close_pipe(thread_quit_pipe
);
508 uri_free(control_uri
);
510 /* Live URI is freed in the live thread. */
512 if (tracing_group_name_override
) {
513 free((void *) tracing_group_name
);
518 * Write to writable pipe used to notify a thread.
521 int notify_thread_pipe(int wpipe
)
525 ret
= lttng_write(wpipe
, "!", 1);
527 PERROR("write poll pipe");
536 int notify_health_quit_pipe(int *pipe
)
540 ret
= lttng_write(pipe
[1], "4", 1);
542 PERROR("write relay health quit");
551 * Stop all relayd and relayd-live threads.
553 int lttng_relay_stop_threads(void)
557 /* Stopping all threads */
558 DBG("Terminating all threads");
559 if (notify_thread_pipe(thread_quit_pipe
[1])) {
560 ERR("write error on thread quit pipe");
564 if (notify_health_quit_pipe(health_quit_pipe
)) {
565 ERR("write error on health quit pipe");
568 /* Dispatch thread */
569 CMM_STORE_SHARED(dispatch_thread_exit
, 1);
570 futex_nto1_wake(&relay_conn_queue
.futex
);
572 if (relayd_live_stop()) {
573 ERR("Error stopping live threads");
580 * Signal handler for the daemon
582 * Simply stop all worker threads, leaving main() return gracefully after
583 * joining all threads and calling cleanup().
586 void sighandler(int sig
)
590 DBG("SIGPIPE caught");
593 DBG("SIGINT caught");
594 if (lttng_relay_stop_threads()) {
595 ERR("Error stopping threads");
599 DBG("SIGTERM caught");
600 if (lttng_relay_stop_threads()) {
601 ERR("Error stopping threads");
605 CMM_STORE_SHARED(recv_child_signal
, 1);
613 * Setup signal handler for :
614 * SIGINT, SIGTERM, SIGPIPE
617 int set_signal_handler(void)
623 if ((ret
= sigemptyset(&sigset
)) < 0) {
624 PERROR("sigemptyset");
628 sa
.sa_handler
= sighandler
;
631 if ((ret
= sigaction(SIGTERM
, &sa
, NULL
)) < 0) {
636 if ((ret
= sigaction(SIGINT
, &sa
, NULL
)) < 0) {
641 if ((ret
= sigaction(SIGPIPE
, &sa
, NULL
)) < 0) {
646 if ((ret
= sigaction(SIGUSR1
, &sa
, NULL
)) < 0) {
651 DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT");
656 void lttng_relay_notify_ready(void)
658 /* Notify the parent of the fork() process that we are ready. */
659 if (opt_daemon
|| opt_background
) {
660 if (uatomic_sub_return(<tng_relay_ready
, 1) == 0) {
661 kill(child_ppid
, SIGUSR1
);
667 * Init thread quit pipe.
669 * Return -1 on error or 0 if all pipes are created.
672 int init_thread_quit_pipe(void)
676 ret
= utils_create_pipe_cloexec(thread_quit_pipe
);
682 * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set.
685 int create_thread_poll_set(struct lttng_poll_event
*events
, int size
)
689 if (events
== NULL
|| size
== 0) {
694 ret
= lttng_poll_create(events
, size
, LTTNG_CLOEXEC
);
700 ret
= lttng_poll_add(events
, thread_quit_pipe
[0], LPOLLIN
| LPOLLERR
);
712 * Check if the thread quit pipe was triggered.
714 * Return 1 if it was triggered else 0;
717 int check_thread_quit_pipe(int fd
, uint32_t events
)
719 if (fd
== thread_quit_pipe
[0] && (events
& LPOLLIN
)) {
727 * Create and init socket from uri.
730 struct lttcomm_sock
*relay_init_sock(struct lttng_uri
*uri
)
733 struct lttcomm_sock
*sock
= NULL
;
735 sock
= lttcomm_alloc_sock_from_uri(uri
);
737 ERR("Allocating socket");
741 ret
= lttcomm_create_sock(sock
);
745 DBG("Listening on sock %d", sock
->fd
);
747 ret
= sock
->ops
->bind(sock
);
752 ret
= sock
->ops
->listen(sock
, -1);
762 lttcomm_destroy_sock(sock
);
768 * Return nonzero if stream needs to be closed.
771 int close_stream_check(struct relay_stream
*stream
)
773 if (stream
->close_flag
&& stream
->prev_seq
== stream
->last_net_seq_num
) {
775 * We are about to close the stream so set the data pending flag to 1
776 * which will make the end data pending command skip the stream which
777 * is now closed and ready. Note that after proceeding to a file close,
778 * the written file is ready for reading.
780 stream
->data_pending_check_done
= 1;
786 static void try_close_stream(struct relay_session
*session
,
787 struct relay_stream
*stream
)
790 struct ctf_trace
*ctf_trace
;
795 if (!close_stream_check(stream
)) {
796 /* Can't close it, not ready for that. */
800 ctf_trace
= ctf_trace_find_by_path(session
->ctf_traces_ht
,
804 pthread_mutex_lock(&session
->viewer_ready_lock
);
805 ctf_trace
->invalid_flag
= 1;
806 pthread_mutex_unlock(&session
->viewer_ready_lock
);
808 ret
= stream_close(session
, stream
);
809 if (ret
|| session
->snapshot
) {
810 /* Already close thus the ctf trace is being or has been destroyed. */
814 ctf_trace_try_destroy(session
, ctf_trace
);
821 * This thread manages the listening for new connections on the network
824 void *relay_thread_listener(void *data
)
826 int i
, ret
, pollfd
, err
= -1;
827 uint32_t revents
, nb_fd
;
828 struct lttng_poll_event events
;
829 struct lttcomm_sock
*control_sock
, *data_sock
;
831 DBG("[thread] Relay listener started");
833 health_register(health_relayd
, HEALTH_RELAYD_TYPE_LISTENER
);
835 health_code_update();
837 control_sock
= relay_init_sock(control_uri
);
839 goto error_sock_control
;
842 data_sock
= relay_init_sock(data_uri
);
844 goto error_sock_relay
;
848 * Pass 3 as size here for the thread quit pipe, control and data socket.
850 ret
= create_thread_poll_set(&events
, 3);
852 goto error_create_poll
;
855 /* Add the control socket */
856 ret
= lttng_poll_add(&events
, control_sock
->fd
, LPOLLIN
| LPOLLRDHUP
);
861 /* Add the data socket */
862 ret
= lttng_poll_add(&events
, data_sock
->fd
, LPOLLIN
| LPOLLRDHUP
);
867 lttng_relay_notify_ready();
869 if (testpoint(relayd_thread_listener
)) {
870 goto error_testpoint
;
874 health_code_update();
876 DBG("Listener accepting connections");
880 ret
= lttng_poll_wait(&events
, -1);
884 * Restart interrupted system call.
886 if (errno
== EINTR
) {
894 DBG("Relay new connection received");
895 for (i
= 0; i
< nb_fd
; i
++) {
896 health_code_update();
898 /* Fetch once the poll data */
899 revents
= LTTNG_POLL_GETEV(&events
, i
);
900 pollfd
= LTTNG_POLL_GETFD(&events
, i
);
903 /* No activity for this FD (poll implementation). */
907 /* Thread quit pipe has been closed. Killing thread. */
908 ret
= check_thread_quit_pipe(pollfd
, revents
);
914 if (revents
& (LPOLLERR
| LPOLLHUP
| LPOLLRDHUP
)) {
915 ERR("socket poll error");
917 } else if (revents
& LPOLLIN
) {
919 * Get allocated in this thread, enqueued to a global queue,
920 * dequeued and freed in the worker thread.
923 struct relay_connection
*new_conn
;
924 struct lttcomm_sock
*newsock
;
926 new_conn
= connection_create();
931 if (pollfd
== data_sock
->fd
) {
932 new_conn
->type
= RELAY_DATA
;
933 newsock
= data_sock
->ops
->accept(data_sock
);
934 DBG("Relay data connection accepted, socket %d",
937 assert(pollfd
== control_sock
->fd
);
938 new_conn
->type
= RELAY_CONTROL
;
939 newsock
= control_sock
->ops
->accept(control_sock
);
940 DBG("Relay control connection accepted, socket %d",
944 PERROR("accepting sock");
945 connection_free(new_conn
);
949 ret
= setsockopt(newsock
->fd
, SOL_SOCKET
, SO_REUSEADDR
, &val
,
952 PERROR("setsockopt inet");
953 lttcomm_destroy_sock(newsock
);
954 connection_free(new_conn
);
957 new_conn
->sock
= newsock
;
959 /* Enqueue request for the dispatcher thread. */
960 cds_wfcq_enqueue(&relay_conn_queue
.head
, &relay_conn_queue
.tail
,
964 * Wake the dispatch queue futex. Implicit memory barrier with
965 * the exchange in cds_wfcq_enqueue.
967 futex_nto1_wake(&relay_conn_queue
.futex
);
976 lttng_poll_clean(&events
);
978 if (data_sock
->fd
>= 0) {
979 ret
= data_sock
->ops
->close(data_sock
);
984 lttcomm_destroy_sock(data_sock
);
986 if (control_sock
->fd
>= 0) {
987 ret
= control_sock
->ops
->close(control_sock
);
992 lttcomm_destroy_sock(control_sock
);
996 ERR("Health error occurred in %s", __func__
);
998 health_unregister(health_relayd
);
999 DBG("Relay listener thread cleanup complete");
1000 lttng_relay_stop_threads();
1005 * This thread manages the dispatching of the requests to worker threads
1008 void *relay_thread_dispatcher(void *data
)
1012 struct cds_wfcq_node
*node
;
1013 struct relay_connection
*new_conn
= NULL
;
1015 DBG("[thread] Relay dispatcher started");
1017 health_register(health_relayd
, HEALTH_RELAYD_TYPE_DISPATCHER
);
1019 if (testpoint(relayd_thread_dispatcher
)) {
1020 goto error_testpoint
;
1023 health_code_update();
1025 while (!CMM_LOAD_SHARED(dispatch_thread_exit
)) {
1026 health_code_update();
1028 /* Atomically prepare the queue futex */
1029 futex_nto1_prepare(&relay_conn_queue
.futex
);
1032 health_code_update();
1034 /* Dequeue commands */
1035 node
= cds_wfcq_dequeue_blocking(&relay_conn_queue
.head
,
1036 &relay_conn_queue
.tail
);
1038 DBG("Woken up but nothing in the relay command queue");
1039 /* Continue thread execution */
1042 new_conn
= caa_container_of(node
, struct relay_connection
, qnode
);
1044 DBG("Dispatching request waiting on sock %d", new_conn
->sock
->fd
);
1047 * Inform worker thread of the new request. This call is blocking
1048 * so we can be assured that the data will be read at some point in
1049 * time or wait to the end of the world :)
1051 ret
= lttng_write(relay_conn_pipe
[1], &new_conn
, sizeof(new_conn
));
1053 PERROR("write connection pipe");
1054 connection_destroy(new_conn
);
1057 } while (node
!= NULL
);
1059 /* Futex wait on queue. Blocking call on futex() */
1060 health_poll_entry();
1061 futex_nto1_wait(&relay_conn_queue
.futex
);
1065 /* Normal exit, no error */
1072 ERR("Health error occurred in %s", __func__
);
1074 health_unregister(health_relayd
);
1075 DBG("Dispatch thread dying");
1076 lttng_relay_stop_threads();
1080 static void try_close_streams(struct relay_session
*session
)
1082 struct ctf_trace
*ctf_trace
;
1083 struct lttng_ht_iter iter
;
1087 pthread_mutex_lock(&session
->viewer_ready_lock
);
1089 cds_lfht_for_each_entry(session
->ctf_traces_ht
->ht
, &iter
.iter
, ctf_trace
,
1091 struct relay_stream
*stream
;
1093 /* Close streams. */
1094 cds_list_for_each_entry(stream
, &ctf_trace
->stream_list
, trace_list
) {
1095 stream_close(session
, stream
);
1098 ctf_trace
->invalid_flag
= 1;
1099 ctf_trace_try_destroy(session
, ctf_trace
);
1102 pthread_mutex_unlock(&session
->viewer_ready_lock
);
1106 * Try to destroy a session within a connection.
1108 static void destroy_session(struct relay_session
*session
,
1109 struct lttng_ht
*sessions_ht
)
1112 assert(sessions_ht
);
1114 /* Indicate that this session can be destroyed from now on. */
1115 session
->close_flag
= 1;
1117 try_close_streams(session
);
1120 * This will try to delete and destroy the session if no viewer is attached
1121 * to it meaning the refcount is down to zero.
1123 session_try_destroy(sessions_ht
, session
);
1127 * Copy index data from the control port to a given index object.
1129 static void copy_index_control_data(struct relay_index
*index
,
1130 struct lttcomm_relayd_index
*data
)
1136 * The index on disk is encoded in big endian, so we don't need to convert
1137 * the data received on the network. The data_offset value is NEVER
1138 * modified here and is updated by the data thread.
1140 index
->index_data
.packet_size
= data
->packet_size
;
1141 index
->index_data
.content_size
= data
->content_size
;
1142 index
->index_data
.timestamp_begin
= data
->timestamp_begin
;
1143 index
->index_data
.timestamp_end
= data
->timestamp_end
;
1144 index
->index_data
.events_discarded
= data
->events_discarded
;
1145 index
->index_data
.stream_id
= data
->stream_id
;
1149 * Handle the RELAYD_CREATE_SESSION command.
1151 * On success, send back the session id or else return a negative value.
1154 int relay_create_session(struct lttcomm_relayd_hdr
*recv_hdr
,
1155 struct relay_connection
*conn
)
1157 int ret
= 0, send_ret
;
1158 struct relay_session
*session
;
1159 struct lttcomm_relayd_status_session reply
;
1164 memset(&reply
, 0, sizeof(reply
));
1166 session
= session_create();
1171 session
->minor
= conn
->minor
;
1172 session
->major
= conn
->major
;
1173 conn
->session_id
= session
->id
;
1174 conn
->session
= session
;
1176 reply
.session_id
= htobe64(session
->id
);
1178 switch (conn
->minor
) {
1183 case 4: /* LTTng sessiond 2.4 */
1185 ret
= cmd_create_session_2_4(conn
, session
);
1188 lttng_ht_add_unique_u64(conn
->sessions_ht
, &session
->session_n
);
1189 DBG("Created session %" PRIu64
, session
->id
);
1193 reply
.ret_code
= htobe32(LTTNG_ERR_FATAL
);
1195 reply
.ret_code
= htobe32(LTTNG_OK
);
1198 send_ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
1200 ERR("Relayd sending session id");
1208 * When we have received all the streams and the metadata for a channel,
1209 * we make them visible to the viewer threads.
1212 void set_viewer_ready_flag(struct relay_connection
*conn
)
1214 struct relay_stream
*stream
, *tmp_stream
;
1216 pthread_mutex_lock(&conn
->session
->viewer_ready_lock
);
1217 cds_list_for_each_entry_safe(stream
, tmp_stream
, &conn
->recv_head
,
1219 stream
->viewer_ready
= 1;
1220 cds_list_del(&stream
->recv_list
);
1222 pthread_mutex_unlock(&conn
->session
->viewer_ready_lock
);
1227 * Add a recv handle node to the connection recv list with the given stream
1228 * handle. A new node is allocated thus must be freed when the node is deleted
1231 static void queue_stream(struct relay_stream
*stream
,
1232 struct relay_connection
*conn
)
1237 cds_list_add(&stream
->recv_list
, &conn
->recv_head
);
1241 * relay_add_stream: allocate a new stream for a session
1244 int relay_add_stream(struct lttcomm_relayd_hdr
*recv_hdr
,
1245 struct relay_connection
*conn
)
1248 struct relay_session
*session
= conn
->session
;
1249 struct relay_stream
*stream
= NULL
;
1250 struct lttcomm_relayd_status_stream reply
;
1251 struct ctf_trace
*trace
= NULL
;
1253 if (!session
|| conn
->version_check_done
== 0) {
1254 ERR("Trying to add a stream before version check");
1256 goto end_no_session
;
1259 stream
= zmalloc(sizeof(struct relay_stream
));
1260 if (stream
== NULL
) {
1261 PERROR("relay stream zmalloc");
1263 goto end_no_session
;
1266 switch (conn
->minor
) {
1267 case 1: /* LTTng sessiond 2.1 */
1268 ret
= cmd_recv_stream_2_1(conn
, stream
);
1270 case 2: /* LTTng sessiond 2.2 */
1272 ret
= cmd_recv_stream_2_2(conn
, stream
);
1276 goto err_free_stream
;
1279 stream
->stream_handle
= ++last_relay_stream_id
;
1280 stream
->prev_seq
= -1ULL;
1281 stream
->session_id
= session
->id
;
1282 stream
->index_fd
= -1;
1283 stream
->read_index_fd
= -1;
1284 stream
->ctf_stream_id
= -1ULL;
1285 lttng_ht_node_init_u64(&stream
->node
, stream
->stream_handle
);
1286 pthread_mutex_init(&stream
->lock
, NULL
);
1288 ret
= utils_mkdir_recursive(stream
->path_name
, S_IRWXU
| S_IRWXG
);
1290 ERR("relay creating output directory");
1291 goto err_free_stream
;
1295 * No need to use run_as API here because whatever we receives, the relayd
1296 * uses its own credentials for the stream files.
1298 ret
= utils_create_stream_file(stream
->path_name
, stream
->channel_name
,
1299 stream
->tracefile_size
, 0, relayd_uid
, relayd_gid
, NULL
);
1301 ERR("Create output file");
1302 goto err_free_stream
;
1305 if (stream
->tracefile_size
) {
1306 DBG("Tracefile %s/%s_0 created", stream
->path_name
, stream
->channel_name
);
1308 DBG("Tracefile %s/%s created", stream
->path_name
, stream
->channel_name
);
1311 /* Protect access to "trace" */
1313 trace
= ctf_trace_find_by_path(session
->ctf_traces_ht
, stream
->path_name
);
1315 trace
= ctf_trace_create(stream
->path_name
);
1320 ctf_trace_add(session
->ctf_traces_ht
, trace
);
1322 ctf_trace_get_ref(trace
);
1324 if (!strncmp(stream
->channel_name
, DEFAULT_METADATA_NAME
, NAME_MAX
)) {
1325 stream
->metadata_flag
= 1;
1326 /* Assign quick reference to the metadata stream in the trace. */
1327 trace
->metadata_stream
= stream
;
1331 * Add the stream in the recv list of the connection. Once the end stream
1332 * message is received, this list is emptied and streams are set with the
1333 * viewer ready flag.
1335 queue_stream(stream
, conn
);
1338 * Both in the ctf_trace object and the global stream ht since the data
1339 * side of the relayd does not have the concept of session.
1341 * rcu_read_lock() is kept to protect the stream which is now part of
1342 * the relay_streams_ht.
1344 lttng_ht_add_unique_u64(relay_streams_ht
, &stream
->node
);
1345 cds_list_add_tail(&stream
->trace_list
, &trace
->stream_list
);
1347 session
->stream_count
++;
1349 DBG("Relay new stream added %s with ID %" PRIu64
, stream
->channel_name
,
1350 stream
->stream_handle
);
1353 memset(&reply
, 0, sizeof(reply
));
1354 reply
.handle
= htobe64(stream
->stream_handle
);
1355 /* send the session id to the client or a negative return code on error */
1357 reply
.ret_code
= htobe32(LTTNG_ERR_UNK
);
1358 /* stream was not properly added to the ht, so free it */
1359 stream_destroy(stream
);
1361 reply
.ret_code
= htobe32(LTTNG_OK
);
1364 send_ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
,
1365 sizeof(struct lttcomm_relayd_status_stream
), 0);
1367 ERR("Relay sending stream id");
1371 * rcu_read_lock() was held to protect either "trace" OR the "stream" at
1382 stream_destroy(stream
);
1387 * relay_close_stream: close a specific stream
1390 int relay_close_stream(struct lttcomm_relayd_hdr
*recv_hdr
,
1391 struct relay_connection
*conn
)
1394 struct relay_session
*session
= conn
->session
;
1395 struct lttcomm_relayd_close_stream stream_info
;
1396 struct lttcomm_relayd_generic_reply reply
;
1397 struct relay_stream
*stream
;
1399 DBG("Close stream received");
1401 if (!session
|| conn
->version_check_done
== 0) {
1402 ERR("Trying to close a stream before version check");
1404 goto end_no_session
;
1407 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &stream_info
,
1408 sizeof(struct lttcomm_relayd_close_stream
), 0);
1409 if (ret
< sizeof(struct lttcomm_relayd_close_stream
)) {
1411 /* Orderly shutdown. Not necessary to print an error. */
1412 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1414 ERR("Relay didn't receive valid add_stream struct size : %d", ret
);
1417 goto end_no_session
;
1421 stream
= stream_find_by_id(relay_streams_ht
,
1422 be64toh(stream_info
.stream_id
));
1428 stream
->last_net_seq_num
= be64toh(stream_info
.last_net_seq_num
);
1429 stream
->close_flag
= 1;
1430 session
->stream_count
--;
1432 /* Check if we can close it or else the data will do it. */
1433 try_close_stream(session
, stream
);
1438 memset(&reply
, 0, sizeof(reply
));
1440 reply
.ret_code
= htobe32(LTTNG_ERR_UNK
);
1442 reply
.ret_code
= htobe32(LTTNG_OK
);
1444 send_ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
,
1445 sizeof(struct lttcomm_relayd_generic_reply
), 0);
1447 ERR("Relay sending stream id");
1456 * relay_unknown_command: send -1 if received unknown command
1459 void relay_unknown_command(struct relay_connection
*conn
)
1461 struct lttcomm_relayd_generic_reply reply
;
1464 memset(&reply
, 0, sizeof(reply
));
1465 reply
.ret_code
= htobe32(LTTNG_ERR_UNK
);
1466 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
,
1467 sizeof(struct lttcomm_relayd_generic_reply
), 0);
1469 ERR("Relay sending unknown command");
1474 * relay_start: send an acknowledgment to the client to tell if we are
1475 * ready to receive data. We are ready if a session is established.
1478 int relay_start(struct lttcomm_relayd_hdr
*recv_hdr
,
1479 struct relay_connection
*conn
)
1481 int ret
= htobe32(LTTNG_OK
);
1482 struct lttcomm_relayd_generic_reply reply
;
1483 struct relay_session
*session
= conn
->session
;
1486 DBG("Trying to start the streaming without a session established");
1487 ret
= htobe32(LTTNG_ERR_UNK
);
1490 memset(&reply
, 0, sizeof(reply
));
1491 reply
.ret_code
= ret
;
1492 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
,
1493 sizeof(struct lttcomm_relayd_generic_reply
), 0);
1495 ERR("Relay sending start ack");
1502 * Append padding to the file pointed by the file descriptor fd.
1504 static int write_padding_to_file(int fd
, uint32_t size
)
1513 zeros
= zmalloc(size
);
1514 if (zeros
== NULL
) {
1515 PERROR("zmalloc zeros for padding");
1520 ret
= lttng_write(fd
, zeros
, size
);
1522 PERROR("write padding to file");
1532 * relay_recv_metadata: receive the metada for the session.
1535 int relay_recv_metadata(struct lttcomm_relayd_hdr
*recv_hdr
,
1536 struct relay_connection
*conn
)
1538 int ret
= htobe32(LTTNG_OK
);
1540 struct relay_session
*session
= conn
->session
;
1541 struct lttcomm_relayd_metadata_payload
*metadata_struct
;
1542 struct relay_stream
*metadata_stream
;
1543 uint64_t data_size
, payload_size
;
1544 struct ctf_trace
*ctf_trace
;
1547 ERR("Metadata sent before version check");
1552 data_size
= payload_size
= be64toh(recv_hdr
->data_size
);
1553 if (data_size
< sizeof(struct lttcomm_relayd_metadata_payload
)) {
1554 ERR("Incorrect data size");
1558 payload_size
-= sizeof(struct lttcomm_relayd_metadata_payload
);
1560 if (data_buffer_size
< data_size
) {
1561 /* In case the realloc fails, we can free the memory */
1564 tmp_data_ptr
= realloc(data_buffer
, data_size
);
1565 if (!tmp_data_ptr
) {
1566 ERR("Allocating data buffer");
1571 data_buffer
= tmp_data_ptr
;
1572 data_buffer_size
= data_size
;
1574 memset(data_buffer
, 0, data_size
);
1575 DBG2("Relay receiving metadata, waiting for %" PRIu64
" bytes", data_size
);
1576 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, data_buffer
, data_size
, 0);
1577 if (ret
< 0 || ret
!= data_size
) {
1579 /* Orderly shutdown. Not necessary to print an error. */
1580 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1582 ERR("Relay didn't receive the whole metadata");
1587 metadata_struct
= (struct lttcomm_relayd_metadata_payload
*) data_buffer
;
1590 metadata_stream
= stream_find_by_id(relay_streams_ht
,
1591 be64toh(metadata_struct
->stream_id
));
1592 if (!metadata_stream
) {
1597 size_ret
= lttng_write(metadata_stream
->fd
, metadata_struct
->payload
,
1599 if (size_ret
< payload_size
) {
1600 ERR("Relay error writing metadata on file");
1605 ret
= write_padding_to_file(metadata_stream
->fd
,
1606 be32toh(metadata_struct
->padding_size
));
1611 ctf_trace
= ctf_trace_find_by_path(session
->ctf_traces_ht
,
1612 metadata_stream
->path_name
);
1614 ctf_trace
->metadata_received
+=
1615 payload_size
+ be32toh(metadata_struct
->padding_size
);
1617 DBG2("Relay metadata written");
1626 * relay_send_version: send relayd version number
1629 int relay_send_version(struct lttcomm_relayd_hdr
*recv_hdr
,
1630 struct relay_connection
*conn
)
1633 struct lttcomm_relayd_version reply
, msg
;
1637 conn
->version_check_done
= 1;
1639 /* Get version from the other side. */
1640 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &msg
, sizeof(msg
), 0);
1641 if (ret
< 0 || ret
!= sizeof(msg
)) {
1643 /* Orderly shutdown. Not necessary to print an error. */
1644 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1646 ERR("Relay failed to receive the version values.");
1652 memset(&reply
, 0, sizeof(reply
));
1653 reply
.major
= RELAYD_VERSION_COMM_MAJOR
;
1654 reply
.minor
= RELAYD_VERSION_COMM_MINOR
;
1656 /* Major versions must be the same */
1657 if (reply
.major
!= be32toh(msg
.major
)) {
1658 DBG("Incompatible major versions (%u vs %u), deleting session",
1659 reply
.major
, be32toh(msg
.major
));
1660 destroy_session(conn
->session
, conn
->sessions_ht
);
1665 conn
->major
= reply
.major
;
1666 /* We adapt to the lowest compatible version */
1667 if (reply
.minor
<= be32toh(msg
.minor
)) {
1668 conn
->minor
= reply
.minor
;
1670 conn
->minor
= be32toh(msg
.minor
);
1673 reply
.major
= htobe32(reply
.major
);
1674 reply
.minor
= htobe32(reply
.minor
);
1675 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
,
1676 sizeof(struct lttcomm_relayd_version
), 0);
1678 ERR("Relay sending version");
1681 DBG("Version check done using protocol %u.%u", conn
->major
,
1689 * Check for data pending for a given stream id from the session daemon.
1692 int relay_data_pending(struct lttcomm_relayd_hdr
*recv_hdr
,
1693 struct relay_connection
*conn
)
1695 struct relay_session
*session
= conn
->session
;
1696 struct lttcomm_relayd_data_pending msg
;
1697 struct lttcomm_relayd_generic_reply reply
;
1698 struct relay_stream
*stream
;
1700 uint64_t last_net_seq_num
, stream_id
;
1702 DBG("Data pending command received");
1704 if (!session
|| conn
->version_check_done
== 0) {
1705 ERR("Trying to check for data before version check");
1707 goto end_no_session
;
1710 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &msg
, sizeof(msg
), 0);
1711 if (ret
< sizeof(msg
)) {
1713 /* Orderly shutdown. Not necessary to print an error. */
1714 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1716 ERR("Relay didn't receive valid data_pending struct size : %d",
1720 goto end_no_session
;
1723 stream_id
= be64toh(msg
.stream_id
);
1724 last_net_seq_num
= be64toh(msg
.last_net_seq_num
);
1727 stream
= stream_find_by_id(relay_streams_ht
, stream_id
);
1728 if (stream
== NULL
) {
1733 DBG("Data pending for stream id %" PRIu64
" prev_seq %" PRIu64
1734 " and last_seq %" PRIu64
, stream_id
, stream
->prev_seq
,
1737 /* Avoid wrapping issue */
1738 if (((int64_t) (stream
->prev_seq
- last_net_seq_num
)) >= 0) {
1739 /* Data has in fact been written and is NOT pending */
1742 /* Data still being streamed thus pending */
1746 /* Pending check is now done. */
1747 stream
->data_pending_check_done
= 1;
1752 memset(&reply
, 0, sizeof(reply
));
1753 reply
.ret_code
= htobe32(ret
);
1754 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
1756 ERR("Relay data pending ret code failed");
1764 * Wait for the control socket to reach a quiescent state.
1766 * Note that for now, when receiving this command from the session daemon, this
1767 * means that every subsequent commands or data received on the control socket
1768 * has been handled. So, this is why we simply return OK here.
1771 int relay_quiescent_control(struct lttcomm_relayd_hdr
*recv_hdr
,
1772 struct relay_connection
*conn
)
1776 struct relay_stream
*stream
;
1777 struct lttng_ht_iter iter
;
1778 struct lttcomm_relayd_quiescent_control msg
;
1779 struct lttcomm_relayd_generic_reply reply
;
1781 DBG("Checking quiescent state on control socket");
1783 if (!conn
->session
|| conn
->version_check_done
== 0) {
1784 ERR("Trying to check for data before version check");
1786 goto end_no_session
;
1789 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &msg
, sizeof(msg
), 0);
1790 if (ret
< sizeof(msg
)) {
1792 /* Orderly shutdown. Not necessary to print an error. */
1793 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1795 ERR("Relay didn't receive valid begin data_pending struct size: %d",
1799 goto end_no_session
;
1802 stream_id
= be64toh(msg
.stream_id
);
1805 cds_lfht_for_each_entry(relay_streams_ht
->ht
, &iter
.iter
, stream
,
1807 if (stream
->stream_handle
== stream_id
) {
1808 stream
->data_pending_check_done
= 1;
1809 DBG("Relay quiescent control pending flag set to %" PRIu64
,
1816 memset(&reply
, 0, sizeof(reply
));
1817 reply
.ret_code
= htobe32(LTTNG_OK
);
1818 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
1820 ERR("Relay data quiescent control ret code failed");
1828 * Initialize a data pending command. This means that a client is about to ask
1829 * for data pending for each stream he/she holds. Simply iterate over all
1830 * streams of a session and set the data_pending_check_done flag.
1832 * This command returns to the client a LTTNG_OK code.
1835 int relay_begin_data_pending(struct lttcomm_relayd_hdr
*recv_hdr
,
1836 struct relay_connection
*conn
)
1839 struct lttng_ht_iter iter
;
1840 struct lttcomm_relayd_begin_data_pending msg
;
1841 struct lttcomm_relayd_generic_reply reply
;
1842 struct relay_stream
*stream
;
1843 uint64_t session_id
;
1848 DBG("Init streams for data pending");
1850 if (!conn
->session
|| conn
->version_check_done
== 0) {
1851 ERR("Trying to check for data before version check");
1853 goto end_no_session
;
1856 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &msg
, sizeof(msg
), 0);
1857 if (ret
< sizeof(msg
)) {
1859 /* Orderly shutdown. Not necessary to print an error. */
1860 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1862 ERR("Relay didn't receive valid begin data_pending struct size: %d",
1866 goto end_no_session
;
1869 session_id
= be64toh(msg
.session_id
);
1872 * Iterate over all streams to set the begin data pending flag. For now, the
1873 * streams are indexed by stream handle so we have to iterate over all
1874 * streams to find the one associated with the right session_id.
1877 cds_lfht_for_each_entry(relay_streams_ht
->ht
, &iter
.iter
, stream
,
1879 if (stream
->session_id
== session_id
) {
1880 stream
->data_pending_check_done
= 0;
1881 DBG("Set begin data pending flag to stream %" PRIu64
,
1882 stream
->stream_handle
);
1887 memset(&reply
, 0, sizeof(reply
));
1888 /* All good, send back reply. */
1889 reply
.ret_code
= htobe32(LTTNG_OK
);
1891 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
1893 ERR("Relay begin data pending send reply failed");
1901 * End data pending command. This will check, for a given session id, if each
1902 * stream associated with it has its data_pending_check_done flag set. If not,
1903 * this means that the client lost track of the stream but the data is still
1904 * being streamed on our side. In this case, we inform the client that data is
1907 * Return to the client if there is data in flight or not with a ret_code.
1910 int relay_end_data_pending(struct lttcomm_relayd_hdr
*recv_hdr
,
1911 struct relay_connection
*conn
)
1914 struct lttng_ht_iter iter
;
1915 struct lttcomm_relayd_end_data_pending msg
;
1916 struct lttcomm_relayd_generic_reply reply
;
1917 struct relay_stream
*stream
;
1918 uint64_t session_id
;
1919 uint32_t is_data_inflight
= 0;
1924 DBG("End data pending command");
1926 if (!conn
->session
|| conn
->version_check_done
== 0) {
1927 ERR("Trying to check for data before version check");
1929 goto end_no_session
;
1932 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &msg
, sizeof(msg
), 0);
1933 if (ret
< sizeof(msg
)) {
1935 /* Orderly shutdown. Not necessary to print an error. */
1936 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
1938 ERR("Relay didn't receive valid end data_pending struct size: %d",
1942 goto end_no_session
;
1945 session_id
= be64toh(msg
.session_id
);
1947 /* Iterate over all streams to see if the begin data pending flag is set. */
1949 cds_lfht_for_each_entry(relay_streams_ht
->ht
, &iter
.iter
, stream
,
1951 if (stream
->session_id
== session_id
&&
1952 !stream
->data_pending_check_done
&& !stream
->terminated_flag
) {
1953 is_data_inflight
= 1;
1954 DBG("Data is still in flight for stream %" PRIu64
,
1955 stream
->stream_handle
);
1961 memset(&reply
, 0, sizeof(reply
));
1962 /* All good, send back reply. */
1963 reply
.ret_code
= htobe32(is_data_inflight
);
1965 ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
1967 ERR("Relay end data pending send reply failed");
1975 * Receive an index for a specific stream.
1977 * Return 0 on success else a negative value.
1980 int relay_recv_index(struct lttcomm_relayd_hdr
*recv_hdr
,
1981 struct relay_connection
*conn
)
1983 int ret
, send_ret
, index_created
= 0;
1984 struct relay_session
*session
= conn
->session
;
1985 struct lttcomm_relayd_index index_info
;
1986 struct relay_index
*index
, *wr_index
= NULL
;
1987 struct lttcomm_relayd_generic_reply reply
;
1988 struct relay_stream
*stream
;
1989 uint64_t net_seq_num
;
1993 DBG("Relay receiving index");
1995 if (!session
|| conn
->version_check_done
== 0) {
1996 ERR("Trying to close a stream before version check");
1998 goto end_no_session
;
2001 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &index_info
,
2002 sizeof(index_info
), 0);
2003 if (ret
< sizeof(index_info
)) {
2005 /* Orderly shutdown. Not necessary to print an error. */
2006 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
2008 ERR("Relay didn't receive valid index struct size : %d", ret
);
2011 goto end_no_session
;
2014 net_seq_num
= be64toh(index_info
.net_seq_num
);
2017 stream
= stream_find_by_id(relay_streams_ht
,
2018 be64toh(index_info
.relay_stream_id
));
2021 goto end_rcu_unlock
;
2024 /* Live beacon handling */
2025 if (index_info
.packet_size
== 0) {
2026 DBG("Received live beacon for stream %" PRIu64
, stream
->stream_handle
);
2029 * Only flag a stream inactive when it has already received data
2030 * and no indexes are in flight.
2032 if (stream
->total_index_received
> 0 && stream
->indexes_in_flight
== 0) {
2033 stream
->beacon_ts_end
= be64toh(index_info
.timestamp_end
);
2036 goto end_rcu_unlock
;
2038 stream
->beacon_ts_end
= -1ULL;
2041 index
= relay_index_find(stream
->stream_handle
, net_seq_num
);
2043 /* A successful creation will add the object to the HT. */
2044 index
= relay_index_create(stream
->stream_handle
, net_seq_num
);
2046 goto end_rcu_unlock
;
2049 stream
->indexes_in_flight
++;
2052 copy_index_control_data(index
, &index_info
);
2053 if (stream
->ctf_stream_id
== -1ULL) {
2054 stream
->ctf_stream_id
= be64toh(index_info
.stream_id
);
2057 if (index_created
) {
2059 * Try to add the relay index object to the hash table. If an object
2060 * already exist, destroy back the index created, set the data in this
2061 * object and write it on disk.
2063 relay_index_add(index
, &wr_index
);
2065 copy_index_control_data(wr_index
, &index_info
);
2069 /* The index already exists so write it on disk. */
2073 /* Do we have a writable ready index to write on disk. */
2075 ret
= relay_index_write(wr_index
->fd
, wr_index
);
2077 goto end_rcu_unlock
;
2079 stream
->total_index_received
++;
2080 stream
->indexes_in_flight
--;
2081 assert(stream
->indexes_in_flight
>= 0);
2087 memset(&reply
, 0, sizeof(reply
));
2089 reply
.ret_code
= htobe32(LTTNG_ERR_UNK
);
2091 reply
.ret_code
= htobe32(LTTNG_OK
);
2093 send_ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
2095 ERR("Relay sending close index id reply");
2104 * Receive the streams_sent message.
2106 * Return 0 on success else a negative value.
2109 int relay_streams_sent(struct lttcomm_relayd_hdr
*recv_hdr
,
2110 struct relay_connection
*conn
)
2113 struct lttcomm_relayd_generic_reply reply
;
2117 DBG("Relay receiving streams_sent");
2119 if (!conn
->session
|| conn
->version_check_done
== 0) {
2120 ERR("Trying to close a stream before version check");
2122 goto end_no_session
;
2126 * Flag every pending stream in the connection recv list that they are
2127 * ready to be used by the viewer.
2129 set_viewer_ready_flag(conn
);
2132 * Inform the viewer that there are new streams in the session.
2134 if (conn
->session
->viewer_refcount
) {
2135 uatomic_set(&conn
->session
->new_streams
, 1);
2138 memset(&reply
, 0, sizeof(reply
));
2139 reply
.ret_code
= htobe32(LTTNG_OK
);
2140 send_ret
= conn
->sock
->ops
->sendmsg(conn
->sock
, &reply
, sizeof(reply
), 0);
2142 ERR("Relay sending sent_stream reply");
2154 * Process the commands received on the control socket
2157 int relay_process_control(struct lttcomm_relayd_hdr
*recv_hdr
,
2158 struct relay_connection
*conn
)
2162 switch (be32toh(recv_hdr
->cmd
)) {
2163 case RELAYD_CREATE_SESSION
:
2164 ret
= relay_create_session(recv_hdr
, conn
);
2166 case RELAYD_ADD_STREAM
:
2167 ret
= relay_add_stream(recv_hdr
, conn
);
2169 case RELAYD_START_DATA
:
2170 ret
= relay_start(recv_hdr
, conn
);
2172 case RELAYD_SEND_METADATA
:
2173 ret
= relay_recv_metadata(recv_hdr
, conn
);
2175 case RELAYD_VERSION
:
2176 ret
= relay_send_version(recv_hdr
, conn
);
2178 case RELAYD_CLOSE_STREAM
:
2179 ret
= relay_close_stream(recv_hdr
, conn
);
2181 case RELAYD_DATA_PENDING
:
2182 ret
= relay_data_pending(recv_hdr
, conn
);
2184 case RELAYD_QUIESCENT_CONTROL
:
2185 ret
= relay_quiescent_control(recv_hdr
, conn
);
2187 case RELAYD_BEGIN_DATA_PENDING
:
2188 ret
= relay_begin_data_pending(recv_hdr
, conn
);
2190 case RELAYD_END_DATA_PENDING
:
2191 ret
= relay_end_data_pending(recv_hdr
, conn
);
2193 case RELAYD_SEND_INDEX
:
2194 ret
= relay_recv_index(recv_hdr
, conn
);
2196 case RELAYD_STREAMS_SENT
:
2197 ret
= relay_streams_sent(recv_hdr
, conn
);
2199 case RELAYD_UPDATE_SYNC_INFO
:
2201 ERR("Received unknown command (%u)", be32toh(recv_hdr
->cmd
));
2202 relay_unknown_command(conn
);
2212 * Handle index for a data stream.
2214 * RCU read side lock MUST be acquired.
2216 * Return 0 on success else a negative value.
2218 static int handle_index_data(struct relay_stream
*stream
, uint64_t net_seq_num
,
2221 int ret
= 0, index_created
= 0;
2222 uint64_t stream_id
, data_offset
;
2223 struct relay_index
*index
, *wr_index
= NULL
;
2227 stream_id
= stream
->stream_handle
;
2228 /* Get data offset because we are about to update the index. */
2229 data_offset
= htobe64(stream
->tracefile_size_current
);
2232 * Lookup for an existing index for that stream id/sequence number. If on
2233 * exists, the control thread already received the data for it thus we need
2234 * to write it on disk.
2236 index
= relay_index_find(stream_id
, net_seq_num
);
2238 /* A successful creation will add the object to the HT. */
2239 index
= relay_index_create(stream_id
, net_seq_num
);
2245 stream
->indexes_in_flight
++;
2248 if (rotate_index
|| stream
->index_fd
< 0) {
2249 index
->to_close_fd
= stream
->index_fd
;
2250 ret
= index_create_file(stream
->path_name
, stream
->channel_name
,
2251 relayd_uid
, relayd_gid
, stream
->tracefile_size
,
2252 stream
->tracefile_count_current
);
2254 /* This will close the stream's index fd if one. */
2255 relay_index_free_safe(index
);
2258 stream
->index_fd
= ret
;
2260 index
->fd
= stream
->index_fd
;
2261 index
->index_data
.offset
= data_offset
;
2263 if (index_created
) {
2265 * Try to add the relay index object to the hash table. If an object
2266 * already exist, destroy back the index created and set the data.
2268 relay_index_add(index
, &wr_index
);
2270 /* Copy back data from the created index. */
2271 wr_index
->fd
= index
->fd
;
2272 wr_index
->to_close_fd
= index
->to_close_fd
;
2273 wr_index
->index_data
.offset
= data_offset
;
2277 /* The index already exists so write it on disk. */
2281 /* Do we have a writable ready index to write on disk. */
2283 ret
= relay_index_write(wr_index
->fd
, wr_index
);
2287 stream
->total_index_received
++;
2288 stream
->indexes_in_flight
--;
2289 assert(stream
->indexes_in_flight
>= 0);
2297 * relay_process_data: Process the data received on the data socket
2300 int relay_process_data(struct relay_connection
*conn
)
2302 int ret
= 0, rotate_index
= 0;
2304 struct relay_stream
*stream
;
2305 struct lttcomm_relayd_data_hdr data_hdr
;
2307 uint64_t net_seq_num
;
2309 struct relay_session
*session
;
2313 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, &data_hdr
,
2314 sizeof(struct lttcomm_relayd_data_hdr
), 0);
2317 /* Orderly shutdown. Not necessary to print an error. */
2318 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
2320 ERR("Unable to receive data header on sock %d", conn
->sock
->fd
);
2326 stream_id
= be64toh(data_hdr
.stream_id
);
2329 stream
= stream_find_by_id(relay_streams_ht
, stream_id
);
2332 goto end_rcu_unlock
;
2335 session
= session_find_by_id(conn
->sessions_ht
, stream
->session_id
);
2338 data_size
= be32toh(data_hdr
.data_size
);
2339 if (data_buffer_size
< data_size
) {
2342 tmp_data_ptr
= realloc(data_buffer
, data_size
);
2343 if (!tmp_data_ptr
) {
2344 ERR("Allocating data buffer");
2347 goto end_rcu_unlock
;
2349 data_buffer
= tmp_data_ptr
;
2350 data_buffer_size
= data_size
;
2352 memset(data_buffer
, 0, data_size
);
2354 net_seq_num
= be64toh(data_hdr
.net_seq_num
);
2356 DBG3("Receiving data of size %u for stream id %" PRIu64
" seqnum %" PRIu64
,
2357 data_size
, stream_id
, net_seq_num
);
2358 ret
= conn
->sock
->ops
->recvmsg(conn
->sock
, data_buffer
, data_size
, 0);
2361 /* Orderly shutdown. Not necessary to print an error. */
2362 DBG("Socket %d did an orderly shutdown", conn
->sock
->fd
);
2365 goto end_rcu_unlock
;
2368 /* Check if a rotation is needed. */
2369 if (stream
->tracefile_size
> 0 &&
2370 (stream
->tracefile_size_current
+ data_size
) >
2371 stream
->tracefile_size
) {
2372 struct relay_viewer_stream
*vstream
;
2375 new_id
= (stream
->tracefile_count_current
+ 1) %
2376 stream
->tracefile_count
;
2378 * When we wrap-around back to 0, we start overwriting old
2381 if (!stream
->tracefile_overwrite
&& new_id
== 0) {
2382 stream
->tracefile_overwrite
= 1;
2384 pthread_mutex_lock(&stream
->viewer_stream_rotation_lock
);
2385 if (stream
->tracefile_overwrite
) {
2386 stream
->oldest_tracefile_id
=
2387 (stream
->oldest_tracefile_id
+ 1) %
2388 stream
->tracefile_count
;
2390 vstream
= viewer_stream_find_by_id(stream
->stream_handle
);
2393 * The viewer is reading a file about to be
2394 * overwritten. Close the FDs it is
2395 * currently using and let it handle the fault.
2397 if (vstream
->tracefile_count_current
== new_id
) {
2398 pthread_mutex_lock(&vstream
->overwrite_lock
);
2399 vstream
->abort_flag
= 1;
2400 pthread_mutex_unlock(&vstream
->overwrite_lock
);
2401 DBG("Streaming side setting abort_flag on stream %s_%" PRIu64
"\n",
2402 stream
->channel_name
, new_id
);
2403 } else if (vstream
->tracefile_count_current
==
2404 stream
->tracefile_count_current
) {
2406 * The reader and writer were in the
2407 * same trace file, inform the viewer
2408 * that no new index will ever be added
2411 vstream
->close_write_flag
= 1;
2414 ret
= utils_rotate_stream_file(stream
->path_name
, stream
->channel_name
,
2415 stream
->tracefile_size
, stream
->tracefile_count
,
2416 relayd_uid
, relayd_gid
, stream
->fd
,
2417 &(stream
->tracefile_count_current
), &stream
->fd
);
2418 pthread_mutex_unlock(&stream
->viewer_stream_rotation_lock
);
2420 ERR("Rotating stream output file");
2421 goto end_rcu_unlock
;
2423 /* Reset current size because we just perform a stream rotation. */
2424 stream
->tracefile_size_current
= 0;
2429 * Index are handled in protocol version 2.4 and above. Also, snapshot and
2430 * index are NOT supported.
2432 if (session
->minor
>= 4 && !session
->snapshot
) {
2433 ret
= handle_index_data(stream
, net_seq_num
, rotate_index
);
2435 goto end_rcu_unlock
;
2439 /* Write data to stream output fd. */
2440 size_ret
= lttng_write(stream
->fd
, data_buffer
, data_size
);
2441 if (size_ret
< data_size
) {
2442 ERR("Relay error writing data to file");
2444 goto end_rcu_unlock
;
2447 DBG2("Relay wrote %d bytes to tracefile for stream id %" PRIu64
,
2448 ret
, stream
->stream_handle
);
2450 ret
= write_padding_to_file(stream
->fd
, be32toh(data_hdr
.padding_size
));
2452 goto end_rcu_unlock
;
2454 stream
->tracefile_size_current
+= data_size
+ be32toh(data_hdr
.padding_size
);
2456 stream
->prev_seq
= net_seq_num
;
2458 try_close_stream(session
, stream
);
2467 void cleanup_connection_pollfd(struct lttng_poll_event
*events
, int pollfd
)
2473 (void) lttng_poll_del(events
, pollfd
);
2475 ret
= close(pollfd
);
2477 ERR("Closing pollfd %d", pollfd
);
2481 static void destroy_connection(struct lttng_ht
*relay_connections_ht
,
2482 struct relay_connection
*conn
)
2484 assert(relay_connections_ht
);
2487 connection_delete(relay_connections_ht
, conn
);
2489 /* For the control socket, we try to destroy the session. */
2490 if (conn
->type
== RELAY_CONTROL
&& conn
->session
) {
2491 destroy_session(conn
->session
, conn
->sessions_ht
);
2494 connection_destroy(conn
);
2498 * This thread does the actual work
2501 void *relay_thread_worker(void *data
)
2503 int ret
, err
= -1, last_seen_data_fd
= -1;
2505 struct lttng_poll_event events
;
2506 struct lttng_ht
*relay_connections_ht
;
2507 struct lttng_ht_iter iter
;
2508 struct lttcomm_relayd_hdr recv_hdr
;
2509 struct relay_local_data
*relay_ctx
= (struct relay_local_data
*) data
;
2510 struct lttng_ht
*sessions_ht
= relay_ctx
->sessions_ht
;
2511 struct relay_index
*index
;
2512 struct relay_connection
*destroy_conn
= NULL
;
2514 DBG("[thread] Relay worker started");
2516 rcu_register_thread();
2518 health_register(health_relayd
, HEALTH_RELAYD_TYPE_WORKER
);
2520 if (testpoint(relayd_thread_worker
)) {
2521 goto error_testpoint
;
2524 health_code_update();
2526 /* table of connections indexed on socket */
2527 relay_connections_ht
= lttng_ht_new(0, LTTNG_HT_TYPE_ULONG
);
2528 if (!relay_connections_ht
) {
2529 goto relay_connections_ht_error
;
2532 /* Tables of received indexes indexed by index handle and net_seq_num. */
2533 indexes_ht
= lttng_ht_new(0, LTTNG_HT_TYPE_TWO_U64
);
2535 goto indexes_ht_error
;
2538 ret
= create_thread_poll_set(&events
, 2);
2540 goto error_poll_create
;
2543 ret
= lttng_poll_add(&events
, relay_conn_pipe
[0], LPOLLIN
| LPOLLRDHUP
);
2550 int idx
= -1, i
, seen_control
= 0, last_notdel_data_fd
= -1;
2552 health_code_update();
2554 /* Infinite blocking call, waiting for transmission */
2555 DBG3("Relayd worker thread polling...");
2556 health_poll_entry();
2557 ret
= lttng_poll_wait(&events
, -1);
2561 * Restart interrupted system call.
2563 if (errno
== EINTR
) {
2572 * Process control. The control connection is prioritised so we don't
2573 * starve it with high throughout put tracing data on the data
2576 for (i
= 0; i
< nb_fd
; i
++) {
2577 /* Fetch once the poll data */
2578 uint32_t revents
= LTTNG_POLL_GETEV(&events
, i
);
2579 int pollfd
= LTTNG_POLL_GETFD(&events
, i
);
2581 health_code_update();
2584 /* No activity for this FD (poll implementation). */
2588 /* Thread quit pipe has been closed. Killing thread. */
2589 ret
= check_thread_quit_pipe(pollfd
, revents
);
2595 /* Inspect the relay conn pipe for new connection */
2596 if (pollfd
== relay_conn_pipe
[0]) {
2597 if (revents
& (LPOLLERR
| LPOLLHUP
| LPOLLRDHUP
)) {
2598 ERR("Relay connection pipe error");
2600 } else if (revents
& LPOLLIN
) {
2601 struct relay_connection
*conn
;
2603 ret
= lttng_read(relay_conn_pipe
[0], &conn
, sizeof(conn
));
2607 conn
->sessions_ht
= sessions_ht
;
2608 connection_init(conn
);
2609 lttng_poll_add(&events
, conn
->sock
->fd
,
2610 LPOLLIN
| LPOLLRDHUP
);
2612 lttng_ht_add_unique_ulong(relay_connections_ht
,
2615 DBG("Connection socket %d added", conn
->sock
->fd
);
2618 struct relay_connection
*ctrl_conn
;
2621 ctrl_conn
= connection_find_by_sock(relay_connections_ht
, pollfd
);
2622 /* If not found, there is a synchronization issue. */
2625 if (revents
& (LPOLLERR
| LPOLLHUP
| LPOLLRDHUP
)) {
2626 cleanup_connection_pollfd(&events
, pollfd
);
2627 destroy_connection(relay_connections_ht
, ctrl_conn
);
2628 if (last_seen_data_fd
== pollfd
) {
2629 last_seen_data_fd
= last_notdel_data_fd
;
2631 } else if (revents
& LPOLLIN
) {
2632 if (ctrl_conn
->type
== RELAY_CONTROL
) {
2633 ret
= ctrl_conn
->sock
->ops
->recvmsg(ctrl_conn
->sock
, &recv_hdr
,
2634 sizeof(recv_hdr
), 0);
2636 /* Connection closed */
2637 cleanup_connection_pollfd(&events
, pollfd
);
2638 destroy_connection(relay_connections_ht
, ctrl_conn
);
2639 DBG("Control connection closed with %d", pollfd
);
2641 ret
= relay_process_control(&recv_hdr
, ctrl_conn
);
2643 /* Clear the session on error. */
2644 cleanup_connection_pollfd(&events
, pollfd
);
2645 destroy_connection(relay_connections_ht
, ctrl_conn
);
2646 DBG("Connection closed with %d", pollfd
);
2652 * Flag the last seen data fd not deleted. It will be
2653 * used as the last seen fd if any fd gets deleted in
2656 last_notdel_data_fd
= pollfd
;
2659 ERR("Unknown poll events %u for sock %d", revents
, pollfd
);
2666 * The last loop handled a control request, go back to poll to make
2667 * sure we prioritise the control socket.
2673 if (last_seen_data_fd
>= 0) {
2674 for (i
= 0; i
< nb_fd
; i
++) {
2675 int pollfd
= LTTNG_POLL_GETFD(&events
, i
);
2677 health_code_update();
2679 if (last_seen_data_fd
== pollfd
) {
2686 /* Process data connection. */
2687 for (i
= idx
+ 1; i
< nb_fd
; i
++) {
2688 /* Fetch the poll data. */
2689 uint32_t revents
= LTTNG_POLL_GETEV(&events
, i
);
2690 int pollfd
= LTTNG_POLL_GETFD(&events
, i
);
2691 struct relay_connection
*data_conn
;
2693 health_code_update();
2696 /* No activity for this FD (poll implementation). */
2700 /* Skip the command pipe. It's handled in the first loop. */
2701 if (pollfd
== relay_conn_pipe
[0]) {
2706 data_conn
= connection_find_by_sock(relay_connections_ht
, pollfd
);
2708 /* Skip it. Might be removed before. */
2713 if (revents
& LPOLLIN
) {
2714 if (data_conn
->type
!= RELAY_DATA
) {
2719 ret
= relay_process_data(data_conn
);
2720 /* Connection closed */
2722 cleanup_connection_pollfd(&events
, pollfd
);
2723 destroy_connection(relay_connections_ht
, data_conn
);
2724 DBG("Data connection closed with %d", pollfd
);
2726 * Every goto restart call sets the last seen fd where
2727 * here we don't really care since we gracefully
2728 * continue the loop after the connection is deleted.
2731 /* Keep last seen port. */
2732 last_seen_data_fd
= pollfd
;
2739 last_seen_data_fd
= -1;
2742 /* Normal exit, no error */
2747 lttng_poll_clean(&events
);
2749 /* Cleanup reamaining connection object. */
2751 cds_lfht_for_each_entry(relay_connections_ht
->ht
, &iter
.iter
,
2754 health_code_update();
2755 destroy_connection(relay_connections_ht
, destroy_conn
);
2760 cds_lfht_for_each_entry(indexes_ht
->ht
, &iter
.iter
, index
,
2762 health_code_update();
2763 relay_index_delete(index
);
2764 relay_index_free_safe(index
);
2767 lttng_ht_destroy(indexes_ht
);
2769 lttng_ht_destroy(relay_connections_ht
);
2770 relay_connections_ht_error
:
2771 /* Close relay conn pipes */
2772 utils_close_pipe(relay_conn_pipe
);
2774 DBG("Thread exited with error");
2776 DBG("Worker thread cleanup complete");
2781 ERR("Health error occurred in %s", __func__
);
2783 health_unregister(health_relayd
);
2784 rcu_unregister_thread();
2785 lttng_relay_stop_threads();
2790 * Create the relay command pipe to wake thread_manage_apps.
2791 * Closed in cleanup().
2793 static int create_relay_conn_pipe(void)
2797 ret
= utils_create_pipe_cloexec(relay_conn_pipe
);
2805 int main(int argc
, char **argv
)
2807 int ret
= 0, retval
= 0;
2809 struct relay_local_data
*relay_ctx
= NULL
;
2811 /* Parse arguments */
2813 if (set_options(argc
, argv
)) {
2818 if (set_signal_handler()) {
2823 /* Try to create directory if -o, --output is specified. */
2824 if (opt_output_path
) {
2825 if (*opt_output_path
!= '/') {
2826 ERR("Please specify an absolute path for -o, --output PATH");
2831 ret
= utils_mkdir_recursive(opt_output_path
, S_IRWXU
| S_IRWXG
);
2833 ERR("Unable to create %s", opt_output_path
);
2840 if (opt_daemon
|| opt_background
) {
2843 ret
= lttng_daemonize(&child_ppid
, &recv_child_signal
,
2851 * We are in the child. Make sure all other file
2852 * descriptors are closed, in case we are called with
2853 * more opened file descriptors than the standard ones.
2855 for (i
= 3; i
< sysconf(_SC_OPEN_MAX
); i
++) {
2861 /* Initialize thread health monitoring */
2862 health_relayd
= health_app_create(NR_HEALTH_RELAYD_TYPES
);
2863 if (!health_relayd
) {
2864 PERROR("health_app_create error");
2866 goto exit_health_app_create
;
2869 /* Create thread quit pipe */
2870 if (init_thread_quit_pipe()) {
2872 goto exit_init_data
;
2875 /* We need those values for the file/dir creation. */
2876 relayd_uid
= getuid();
2877 relayd_gid
= getgid();
2879 /* Check if daemon is UID = 0 */
2880 if (relayd_uid
== 0) {
2881 if (control_uri
->port
< 1024 || data_uri
->port
< 1024 || live_uri
->port
< 1024) {
2882 ERR("Need to be root to use ports < 1024");
2884 goto exit_init_data
;
2888 /* Setup the thread apps communication pipe. */
2889 if (create_relay_conn_pipe()) {
2891 goto exit_init_data
;
2894 /* Init relay command queue. */
2895 cds_wfcq_init(&relay_conn_queue
.head
, &relay_conn_queue
.tail
);
2897 /* Set up max poll set size */
2898 if (lttng_poll_set_max_size()) {
2900 goto exit_init_data
;
2903 /* Initialize communication library */
2905 lttcomm_inet_init();
2907 relay_ctx
= zmalloc(sizeof(struct relay_local_data
));
2909 PERROR("relay_ctx");
2911 goto exit_init_data
;
2914 /* tables of sessions indexed by session ID */
2915 relay_ctx
->sessions_ht
= lttng_ht_new(0, LTTNG_HT_TYPE_U64
);
2916 if (!relay_ctx
->sessions_ht
) {
2918 goto exit_init_data
;
2921 /* tables of streams indexed by stream ID */
2922 relay_streams_ht
= lttng_ht_new(0, LTTNG_HT_TYPE_U64
);
2923 if (!relay_streams_ht
) {
2925 goto exit_init_data
;
2928 /* tables of streams indexed by stream ID */
2929 viewer_streams_ht
= lttng_ht_new(0, LTTNG_HT_TYPE_U64
);
2930 if (!viewer_streams_ht
) {
2932 goto exit_init_data
;
2935 ret
= utils_create_pipe(health_quit_pipe
);
2938 goto exit_health_quit_pipe
;
2941 /* Create thread to manage the client socket */
2942 ret
= pthread_create(&health_thread
, NULL
,
2943 thread_manage_health
, (void *) NULL
);
2946 PERROR("pthread_create health");
2948 goto exit_health_thread
;
2951 /* Setup the dispatcher thread */
2952 ret
= pthread_create(&dispatcher_thread
, NULL
,
2953 relay_thread_dispatcher
, (void *) NULL
);
2956 PERROR("pthread_create dispatcher");
2958 goto exit_dispatcher_thread
;
2961 /* Setup the worker thread */
2962 ret
= pthread_create(&worker_thread
, NULL
,
2963 relay_thread_worker
, (void *) relay_ctx
);
2966 PERROR("pthread_create worker");
2968 goto exit_worker_thread
;
2971 /* Setup the listener thread */
2972 ret
= pthread_create(&listener_thread
, NULL
,
2973 relay_thread_listener
, (void *) NULL
);
2976 PERROR("pthread_create listener");
2978 goto exit_listener_thread
;
2981 ret
= relayd_live_create(live_uri
, relay_ctx
);
2983 ERR("Starting live viewer threads");
2989 * This is where we start awaiting program completion (e.g. through
2990 * signal that asks threads to teardown).
2993 ret
= relayd_live_join();
2999 ret
= pthread_join(listener_thread
, &status
);
3002 PERROR("pthread_join listener_thread");
3006 exit_listener_thread
:
3007 ret
= pthread_join(worker_thread
, &status
);
3010 PERROR("pthread_join worker_thread");
3015 ret
= pthread_join(dispatcher_thread
, &status
);
3018 PERROR("pthread_join dispatcher_thread");
3021 exit_dispatcher_thread
:
3023 ret
= pthread_join(health_thread
, &status
);
3026 PERROR("pthread_join health_thread");
3031 utils_close_pipe(health_quit_pipe
);
3032 exit_health_quit_pipe
:
3035 health_app_destroy(health_relayd
);
3036 exit_health_app_create
:
3038 relayd_cleanup(relay_ctx
);