2 * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
3 * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
4 * Copyright (C) 2013 Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 * SPDX-License-Identifier: GPL-2.0-only
10 #include "common/buffer-view.h"
11 #include "common/dynamic-buffer.h"
12 #include "common/sessiond-comm/sessiond-comm.h"
13 #include "lttng/lttng-error.h"
14 #include "lttng/tracker.h"
15 #include <common/compat/getenv.h>
16 #include <common/tracker.h>
17 #include <common/unix.h>
18 #include <common/utils.h>
19 #include <lttng/event-internal.h>
20 #include <lttng/session-descriptor-internal.h>
21 #include <lttng/session-internal.h>
22 #include <lttng/userspace-probe-internal.h>
29 #include "lttng-sessiond.h"
33 #include "health-sessiond.h"
34 #include "testpoint.h"
36 #include "manage-consumer.h"
38 #include "agent-thread.h"
42 static struct thread_state
{
48 static void set_thread_status(bool running
)
50 DBG("Marking client thread's state as %s", running
? "running" : "error");
51 thread_state
.running
= running
;
52 sem_post(&thread_state
.ready
);
55 static bool wait_thread_status(void)
57 DBG("Waiting for client thread to be ready");
58 sem_wait(&thread_state
.ready
);
59 if (thread_state
.running
) {
60 DBG("Client thread is ready");
62 ERR("Initialization of client thread failed");
65 return thread_state
.running
;
69 * Setup the outgoing data buffer for the response (llm) by allocating the
70 * right amount of memory and copying the original information from the lsm
73 * Return 0 on success, negative value on error.
75 static int setup_lttng_msg(struct command_ctx
*cmd_ctx
,
76 const void *payload_buf
, size_t payload_len
,
77 const void *cmd_header_buf
, size_t cmd_header_len
)
80 const size_t header_len
= sizeof(struct lttcomm_lttng_msg
);
81 const size_t cmd_header_offset
= header_len
;
82 const size_t payload_offset
= cmd_header_offset
+ cmd_header_len
;
83 const size_t total_msg_size
= header_len
+ cmd_header_len
+ payload_len
;
86 cmd_ctx
->llm
= zmalloc(total_msg_size
);
88 if (cmd_ctx
->llm
== NULL
) {
94 /* Copy common data */
95 cmd_ctx
->llm
->cmd_type
= cmd_ctx
->lsm
->cmd_type
;
96 cmd_ctx
->llm
->pid
= cmd_ctx
->lsm
->domain
.attr
.pid
;
97 cmd_ctx
->llm
->cmd_header_size
= cmd_header_len
;
98 cmd_ctx
->llm
->data_size
= payload_len
;
99 cmd_ctx
->lttng_msg_size
= total_msg_size
;
101 /* Copy command header */
102 if (cmd_header_len
) {
103 memcpy(((uint8_t *) cmd_ctx
->llm
) + cmd_header_offset
, cmd_header_buf
,
109 memcpy(((uint8_t *) cmd_ctx
->llm
) + payload_offset
, payload_buf
,
118 * Start the thread_manage_consumer. This must be done after a lttng-consumerd
119 * exec or it will fail.
121 static int spawn_consumer_thread(struct consumer_data
*consumer_data
)
123 return launch_consumer_management_thread(consumer_data
) ? 0 : -1;
127 * Fork and exec a consumer daemon (consumerd).
129 * Return pid if successful else -1.
131 static pid_t
spawn_consumerd(struct consumer_data
*consumer_data
)
135 const char *consumer_to_use
;
136 const char *verbosity
;
139 DBG("Spawning consumerd");
146 if (config
.verbose_consumer
) {
147 verbosity
= "--verbose";
148 } else if (lttng_opt_quiet
) {
149 verbosity
= "--quiet";
154 switch (consumer_data
->type
) {
155 case LTTNG_CONSUMER_KERNEL
:
157 * Find out which consumerd to execute. We will first try the
158 * 64-bit path, then the sessiond's installation directory, and
159 * fallback on the 32-bit one,
161 DBG3("Looking for a kernel consumer at these locations:");
162 DBG3(" 1) %s", config
.consumerd64_bin_path
.value
? : "NULL");
163 DBG3(" 2) %s/%s", INSTALL_BIN_PATH
, DEFAULT_CONSUMERD_FILE
);
164 DBG3(" 3) %s", config
.consumerd32_bin_path
.value
? : "NULL");
165 if (stat(config
.consumerd64_bin_path
.value
, &st
) == 0) {
166 DBG3("Found location #1");
167 consumer_to_use
= config
.consumerd64_bin_path
.value
;
168 } else if (stat(INSTALL_BIN_PATH
"/" DEFAULT_CONSUMERD_FILE
, &st
) == 0) {
169 DBG3("Found location #2");
170 consumer_to_use
= INSTALL_BIN_PATH
"/" DEFAULT_CONSUMERD_FILE
;
171 } else if (config
.consumerd32_bin_path
.value
&&
172 stat(config
.consumerd32_bin_path
.value
, &st
) == 0) {
173 DBG3("Found location #3");
174 consumer_to_use
= config
.consumerd32_bin_path
.value
;
176 DBG("Could not find any valid consumerd executable");
180 DBG("Using kernel consumer at: %s", consumer_to_use
);
181 (void) execl(consumer_to_use
,
182 "lttng-consumerd", verbosity
, "-k",
183 "--consumerd-cmd-sock", consumer_data
->cmd_unix_sock_path
,
184 "--consumerd-err-sock", consumer_data
->err_unix_sock_path
,
185 "--group", config
.tracing_group_name
.value
,
188 case LTTNG_CONSUMER64_UST
:
190 if (config
.consumerd64_lib_dir
.value
) {
195 tmp
= lttng_secure_getenv("LD_LIBRARY_PATH");
199 tmplen
= strlen(config
.consumerd64_lib_dir
.value
) + 1 /* : */ + strlen(tmp
);
200 tmpnew
= zmalloc(tmplen
+ 1 /* \0 */);
205 strcat(tmpnew
, config
.consumerd64_lib_dir
.value
);
206 if (tmp
[0] != '\0') {
210 ret
= setenv("LD_LIBRARY_PATH", tmpnew
, 1);
217 DBG("Using 64-bit UST consumer at: %s", config
.consumerd64_bin_path
.value
);
218 (void) execl(config
.consumerd64_bin_path
.value
, "lttng-consumerd", verbosity
, "-u",
219 "--consumerd-cmd-sock", consumer_data
->cmd_unix_sock_path
,
220 "--consumerd-err-sock", consumer_data
->err_unix_sock_path
,
221 "--group", config
.tracing_group_name
.value
,
225 case LTTNG_CONSUMER32_UST
:
227 if (config
.consumerd32_lib_dir
.value
) {
232 tmp
= lttng_secure_getenv("LD_LIBRARY_PATH");
236 tmplen
= strlen(config
.consumerd32_lib_dir
.value
) + 1 /* : */ + strlen(tmp
);
237 tmpnew
= zmalloc(tmplen
+ 1 /* \0 */);
242 strcat(tmpnew
, config
.consumerd32_lib_dir
.value
);
243 if (tmp
[0] != '\0') {
247 ret
= setenv("LD_LIBRARY_PATH", tmpnew
, 1);
254 DBG("Using 32-bit UST consumer at: %s", config
.consumerd32_bin_path
.value
);
255 (void) execl(config
.consumerd32_bin_path
.value
, "lttng-consumerd", verbosity
, "-u",
256 "--consumerd-cmd-sock", consumer_data
->cmd_unix_sock_path
,
257 "--consumerd-err-sock", consumer_data
->err_unix_sock_path
,
258 "--group", config
.tracing_group_name
.value
,
263 ERR("unknown consumer type");
267 PERROR("Consumer execl()");
269 /* Reaching this point, we got a failure on our execl(). */
271 } else if (pid
> 0) {
274 PERROR("start consumer fork");
282 * Spawn the consumerd daemon and session daemon thread.
284 static int start_consumerd(struct consumer_data
*consumer_data
)
289 * Set the listen() state on the socket since there is a possible race
290 * between the exec() of the consumer daemon and this call if place in the
291 * consumer thread. See bug #366 for more details.
293 ret
= lttcomm_listen_unix_sock(consumer_data
->err_sock
);
298 pthread_mutex_lock(&consumer_data
->pid_mutex
);
299 if (consumer_data
->pid
!= 0) {
300 pthread_mutex_unlock(&consumer_data
->pid_mutex
);
304 ret
= spawn_consumerd(consumer_data
);
306 ERR("Spawning consumerd failed");
307 pthread_mutex_unlock(&consumer_data
->pid_mutex
);
311 /* Setting up the consumer_data pid */
312 consumer_data
->pid
= ret
;
313 DBG2("Consumer pid %d", consumer_data
->pid
);
314 pthread_mutex_unlock(&consumer_data
->pid_mutex
);
316 DBG2("Spawning consumer control thread");
317 ret
= spawn_consumer_thread(consumer_data
);
319 ERR("Fatal error spawning consumer control thread");
327 /* Cleanup already created sockets on error. */
328 if (consumer_data
->err_sock
>= 0) {
331 err
= close(consumer_data
->err_sock
);
333 PERROR("close consumer data error socket");
340 * Copy consumer output from the tracing session to the domain session. The
341 * function also applies the right modification on a per domain basis for the
342 * trace files destination directory.
344 * Should *NOT* be called with RCU read-side lock held.
346 static int copy_session_consumer(int domain
, struct ltt_session
*session
)
349 const char *dir_name
;
350 struct consumer_output
*consumer
;
353 assert(session
->consumer
);
356 case LTTNG_DOMAIN_KERNEL
:
357 DBG3("Copying tracing session consumer output in kernel session");
359 * XXX: We should audit the session creation and what this function
360 * does "extra" in order to avoid a destroy since this function is used
361 * in the domain session creation (kernel and ust) only. Same for UST
364 if (session
->kernel_session
->consumer
) {
365 consumer_output_put(session
->kernel_session
->consumer
);
367 session
->kernel_session
->consumer
=
368 consumer_copy_output(session
->consumer
);
369 /* Ease our life a bit for the next part */
370 consumer
= session
->kernel_session
->consumer
;
371 dir_name
= DEFAULT_KERNEL_TRACE_DIR
;
373 case LTTNG_DOMAIN_JUL
:
374 case LTTNG_DOMAIN_LOG4J
:
375 case LTTNG_DOMAIN_PYTHON
:
376 case LTTNG_DOMAIN_UST
:
377 DBG3("Copying tracing session consumer output in UST session");
378 if (session
->ust_session
->consumer
) {
379 consumer_output_put(session
->ust_session
->consumer
);
381 session
->ust_session
->consumer
=
382 consumer_copy_output(session
->consumer
);
383 /* Ease our life a bit for the next part */
384 consumer
= session
->ust_session
->consumer
;
385 dir_name
= DEFAULT_UST_TRACE_DIR
;
388 ret
= LTTNG_ERR_UNKNOWN_DOMAIN
;
392 /* Append correct directory to subdir */
393 ret
= lttng_strncpy(consumer
->domain_subdir
, dir_name
,
394 sizeof(consumer
->domain_subdir
));
399 DBG3("Copy session consumer subdir %s", consumer
->domain_subdir
);
407 * Create an UST session and add it to the session ust list.
409 * Should *NOT* be called with RCU read-side lock held.
411 static int create_ust_session(struct ltt_session
*session
,
412 const struct lttng_domain
*domain
)
415 struct ltt_ust_session
*lus
= NULL
;
419 assert(session
->consumer
);
421 switch (domain
->type
) {
422 case LTTNG_DOMAIN_JUL
:
423 case LTTNG_DOMAIN_LOG4J
:
424 case LTTNG_DOMAIN_PYTHON
:
425 case LTTNG_DOMAIN_UST
:
428 ERR("Unknown UST domain on create session %d", domain
->type
);
429 ret
= LTTNG_ERR_UNKNOWN_DOMAIN
;
433 DBG("Creating UST session");
435 lus
= trace_ust_create_session(session
->id
);
437 ret
= LTTNG_ERR_UST_SESS_FAIL
;
441 lus
->uid
= session
->uid
;
442 lus
->gid
= session
->gid
;
443 lus
->output_traces
= session
->output_traces
;
444 lus
->snapshot_mode
= session
->snapshot_mode
;
445 lus
->live_timer_interval
= session
->live_timer
;
446 session
->ust_session
= lus
;
447 if (session
->shm_path
[0]) {
448 strncpy(lus
->root_shm_path
, session
->shm_path
,
449 sizeof(lus
->root_shm_path
));
450 lus
->root_shm_path
[sizeof(lus
->root_shm_path
) - 1] = '\0';
451 strncpy(lus
->shm_path
, session
->shm_path
,
452 sizeof(lus
->shm_path
));
453 lus
->shm_path
[sizeof(lus
->shm_path
) - 1] = '\0';
454 strncat(lus
->shm_path
, "/ust",
455 sizeof(lus
->shm_path
) - strlen(lus
->shm_path
) - 1);
457 /* Copy session output to the newly created UST session */
458 ret
= copy_session_consumer(domain
->type
, session
);
459 if (ret
!= LTTNG_OK
) {
467 session
->ust_session
= NULL
;
472 * Create a kernel tracer session then create the default channel.
474 static int create_kernel_session(struct ltt_session
*session
)
478 DBG("Creating kernel session");
480 ret
= kernel_create_session(session
);
482 ret
= LTTNG_ERR_KERN_SESS_FAIL
;
486 /* Code flow safety */
487 assert(session
->kernel_session
);
489 /* Copy session output to the newly created Kernel session */
490 ret
= copy_session_consumer(LTTNG_DOMAIN_KERNEL
, session
);
491 if (ret
!= LTTNG_OK
) {
495 session
->kernel_session
->uid
= session
->uid
;
496 session
->kernel_session
->gid
= session
->gid
;
497 session
->kernel_session
->output_traces
= session
->output_traces
;
498 session
->kernel_session
->snapshot_mode
= session
->snapshot_mode
;
499 session
->kernel_session
->is_live_session
= session
->live_timer
!= 0;
504 trace_kernel_destroy_session(session
->kernel_session
);
505 session
->kernel_session
= NULL
;
511 * Count number of session permitted by uid/gid.
513 static unsigned int lttng_sessions_count(uid_t uid
, gid_t gid
)
516 struct ltt_session
*session
;
517 const struct ltt_session_list
*session_list
= session_get_list();
519 DBG("Counting number of available session for UID %d GID %d",
521 cds_list_for_each_entry(session
, &session_list
->head
, list
) {
522 if (!session_get(session
)) {
525 session_lock(session
);
526 /* Only count the sessions the user can control. */
527 if (session_access_ok(session
, uid
, gid
) &&
528 !session
->destroyed
) {
531 session_unlock(session
);
532 session_put(session
);
537 static int receive_userspace_probe(struct command_ctx
*cmd_ctx
, int sock
,
538 int *sock_error
, struct lttng_event
*event
)
541 struct lttng_userspace_probe_location
*probe_location
;
542 struct lttng_dynamic_buffer probe_location_buffer
;
543 struct lttng_buffer_view buffer_view
;
546 * Create a buffer to store the serialized version of the probe
549 lttng_dynamic_buffer_init(&probe_location_buffer
);
550 ret
= lttng_dynamic_buffer_set_size(&probe_location_buffer
,
551 cmd_ctx
->lsm
->u
.enable
.userspace_probe_location_len
);
553 ret
= LTTNG_ERR_NOMEM
;
558 * Receive the probe location.
560 ret
= lttcomm_recv_unix_sock(sock
, probe_location_buffer
.data
,
561 probe_location_buffer
.size
);
563 DBG("Nothing recv() from client var len data... continuing");
565 lttng_dynamic_buffer_reset(&probe_location_buffer
);
566 ret
= LTTNG_ERR_PROBE_LOCATION_INVAL
;
570 buffer_view
= lttng_buffer_view_from_dynamic_buffer(
571 &probe_location_buffer
, 0, probe_location_buffer
.size
);
574 * Extract the probe location from the serialized version.
576 ret
= lttng_userspace_probe_location_create_from_buffer(
577 &buffer_view
, &probe_location
);
579 WARN("Failed to create a userspace probe location from the received buffer");
580 lttng_dynamic_buffer_reset( &probe_location_buffer
);
581 ret
= LTTNG_ERR_PROBE_LOCATION_INVAL
;
586 * Receive the file descriptor to the target binary from the client.
588 DBG("Receiving userspace probe target FD from client ...");
589 ret
= lttcomm_recv_fds_unix_sock(sock
, &fd
, 1);
591 DBG("Nothing recv() from client userspace probe fd... continuing");
593 ret
= LTTNG_ERR_PROBE_LOCATION_INVAL
;
598 * Set the file descriptor received from the client through the unix
599 * socket in the probe location.
601 ret
= lttng_userspace_probe_location_set_binary_fd(probe_location
, fd
);
603 ret
= LTTNG_ERR_PROBE_LOCATION_INVAL
;
607 /* Attach the probe location to the event. */
608 ret
= lttng_event_set_userspace_probe_location(event
, probe_location
);
610 ret
= LTTNG_ERR_PROBE_LOCATION_INVAL
;
614 lttng_dynamic_buffer_reset(&probe_location_buffer
);
620 * Version of setup_lttng_msg() without command header.
622 static int setup_lttng_msg_no_cmd_header(struct command_ctx
*cmd_ctx
,
623 void *payload_buf
, size_t payload_len
)
625 return setup_lttng_msg(cmd_ctx
, payload_buf
, payload_len
, NULL
, 0);
629 * Free memory of a command context structure.
631 static void clean_command_ctx(struct command_ctx
**cmd_ctx
)
633 DBG("Clean command context structure");
635 if ((*cmd_ctx
)->llm
) {
636 free((*cmd_ctx
)->llm
);
638 if ((*cmd_ctx
)->lsm
) {
639 free((*cmd_ctx
)->lsm
);
647 * Check if the current kernel tracer supports the session rotation feature.
648 * Return 1 if it does, 0 otherwise.
650 static int check_rotate_compatible(void)
654 if (kernel_tracer_version
.major
!= 2 || kernel_tracer_version
.minor
< 11) {
655 DBG("Kernel tracer version is not compatible with the rotation feature");
663 * Send data on a unix socket using the liblttsessiondcomm API.
665 * Return lttcomm error code.
667 static int send_unix_sock(int sock
, void *buf
, size_t len
)
669 /* Check valid length */
674 return lttcomm_send_unix_sock(sock
, buf
, len
);
678 * Process the command requested by the lttng client within the command
679 * context structure. This function make sure that the return structure (llm)
680 * is set and ready for transmission before returning.
682 * Return any error encountered or 0 for success.
684 * "sock" is only used for special-case var. len data.
685 * A command may assume the ownership of the socket, in which case its value
686 * should be set to -1.
688 * Should *NOT* be called with RCU read-side lock held.
690 static int process_client_msg(struct command_ctx
*cmd_ctx
, int *sock
,
694 int need_tracing_session
= 1;
696 int need_consumerd
= 1;
698 DBG("Processing client command %d", cmd_ctx
->lsm
->cmd_type
);
700 assert(!rcu_read_ongoing());
704 switch (cmd_ctx
->lsm
->cmd_type
) {
705 case LTTNG_CREATE_SESSION_EXT
:
706 case LTTNG_DESTROY_SESSION
:
707 case LTTNG_LIST_SESSIONS
:
708 case LTTNG_LIST_DOMAINS
:
709 case LTTNG_START_TRACE
:
710 case LTTNG_STOP_TRACE
:
711 case LTTNG_DATA_PENDING
:
712 case LTTNG_SNAPSHOT_ADD_OUTPUT
:
713 case LTTNG_SNAPSHOT_DEL_OUTPUT
:
714 case LTTNG_SNAPSHOT_LIST_OUTPUT
:
715 case LTTNG_SNAPSHOT_RECORD
:
716 case LTTNG_SAVE_SESSION
:
717 case LTTNG_SET_SESSION_SHM_PATH
:
718 case LTTNG_REGENERATE_METADATA
:
719 case LTTNG_REGENERATE_STATEDUMP
:
720 case LTTNG_ROTATE_SESSION
:
721 case LTTNG_ROTATION_GET_INFO
:
722 case LTTNG_ROTATION_SET_SCHEDULE
:
723 case LTTNG_SESSION_LIST_ROTATION_SCHEDULES
:
724 case LTTNG_CLEAR_SESSION
:
725 case LTTNG_LIST_TRIGGERS
:
732 /* Needs a functioning consumerd */
733 switch (cmd_ctx
->lsm
->cmd_type
) {
734 case LTTNG_REGISTER_TRIGGER
:
735 case LTTNG_UNREGISTER_TRIGGER
:
743 if (config
.no_kernel
&& need_domain
744 && cmd_ctx
->lsm
->domain
.type
== LTTNG_DOMAIN_KERNEL
) {
746 ret
= LTTNG_ERR_NEED_ROOT_SESSIOND
;
748 ret
= LTTNG_ERR_KERN_NA
;
753 /* Deny register consumer if we already have a spawned consumer. */
754 if (cmd_ctx
->lsm
->cmd_type
== LTTNG_REGISTER_CONSUMER
) {
755 pthread_mutex_lock(&kconsumer_data
.pid_mutex
);
756 if (kconsumer_data
.pid
> 0) {
757 ret
= LTTNG_ERR_KERN_CONSUMER_FAIL
;
758 pthread_mutex_unlock(&kconsumer_data
.pid_mutex
);
761 pthread_mutex_unlock(&kconsumer_data
.pid_mutex
);
765 * Check for command that don't needs to allocate a returned payload. We do
766 * this here so we don't have to make the call for no payload at each
769 switch(cmd_ctx
->lsm
->cmd_type
) {
770 case LTTNG_LIST_SESSIONS
:
771 case LTTNG_LIST_TRACEPOINTS
:
772 case LTTNG_LIST_TRACEPOINT_FIELDS
:
773 case LTTNG_LIST_DOMAINS
:
774 case LTTNG_LIST_CHANNELS
:
775 case LTTNG_LIST_EVENTS
:
776 case LTTNG_LIST_SYSCALLS
:
777 case LTTNG_SESSION_LIST_ROTATION_SCHEDULES
:
778 case LTTNG_PROCESS_ATTR_TRACKER_GET_POLICY
:
779 case LTTNG_PROCESS_ATTR_TRACKER_GET_INCLUSION_SET
:
780 case LTTNG_DATA_PENDING
:
781 case LTTNG_ROTATE_SESSION
:
782 case LTTNG_ROTATION_GET_INFO
:
783 case LTTNG_REGISTER_TRIGGER
:
784 case LTTNG_LIST_TRIGGERS
:
787 /* Setup lttng message with no payload */
788 ret
= setup_lttng_msg_no_cmd_header(cmd_ctx
, NULL
, 0);
790 /* This label does not try to unlock the session */
791 goto init_setup_error
;
795 /* Commands that DO NOT need a session. */
796 switch (cmd_ctx
->lsm
->cmd_type
) {
797 case LTTNG_CREATE_SESSION_EXT
:
798 case LTTNG_LIST_SESSIONS
:
799 case LTTNG_LIST_TRACEPOINTS
:
800 case LTTNG_LIST_SYSCALLS
:
801 case LTTNG_LIST_TRACEPOINT_FIELDS
:
802 case LTTNG_SAVE_SESSION
:
803 case LTTNG_REGISTER_TRIGGER
:
804 case LTTNG_UNREGISTER_TRIGGER
:
805 case LTTNG_LIST_TRIGGERS
:
806 need_tracing_session
= 0;
809 DBG("Getting session %s by name", cmd_ctx
->lsm
->session
.name
);
811 * We keep the session list lock across _all_ commands
812 * for now, because the per-session lock does not
813 * handle teardown properly.
816 cmd_ctx
->session
= session_find_by_name(cmd_ctx
->lsm
->session
.name
);
817 if (cmd_ctx
->session
== NULL
) {
818 ret
= LTTNG_ERR_SESS_NOT_FOUND
;
821 /* Acquire lock for the session */
822 session_lock(cmd_ctx
->session
);
828 * Commands that need a valid session but should NOT create one if none
829 * exists. Instead of creating one and destroying it when the command is
830 * handled, process that right before so we save some round trip in useless
833 switch (cmd_ctx
->lsm
->cmd_type
) {
834 case LTTNG_DISABLE_CHANNEL
:
835 case LTTNG_DISABLE_EVENT
:
836 switch (cmd_ctx
->lsm
->domain
.type
) {
837 case LTTNG_DOMAIN_KERNEL
:
838 if (!cmd_ctx
->session
->kernel_session
) {
839 ret
= LTTNG_ERR_NO_CHANNEL
;
843 case LTTNG_DOMAIN_JUL
:
844 case LTTNG_DOMAIN_LOG4J
:
845 case LTTNG_DOMAIN_PYTHON
:
846 case LTTNG_DOMAIN_UST
:
847 if (!cmd_ctx
->session
->ust_session
) {
848 ret
= LTTNG_ERR_NO_CHANNEL
;
853 ret
= LTTNG_ERR_UNKNOWN_DOMAIN
;
865 * Check domain type for specific "pre-action".
867 switch (cmd_ctx
->lsm
->domain
.type
) {
868 case LTTNG_DOMAIN_KERNEL
:
870 ret
= LTTNG_ERR_NEED_ROOT_SESSIOND
;
874 /* Kernel tracer check */
875 if (!kernel_tracer_is_initialized()) {
876 /* Basically, load kernel tracer modules */
877 ret
= init_kernel_tracer();
883 /* Consumer is in an ERROR state. Report back to client */
884 if (need_consumerd
&& uatomic_read(&kernel_consumerd_state
) ==
886 ret
= LTTNG_ERR_NO_KERNCONSUMERD
;
890 /* Need a session for kernel command */
891 if (need_tracing_session
) {
892 if (cmd_ctx
->session
->kernel_session
== NULL
) {
893 ret
= create_kernel_session(cmd_ctx
->session
);
894 if (ret
!= LTTNG_OK
) {
895 ret
= LTTNG_ERR_KERN_SESS_FAIL
;
900 /* Start the kernel consumer daemon */
901 pthread_mutex_lock(&kconsumer_data
.pid_mutex
);
902 if (kconsumer_data
.pid
== 0 &&
903 cmd_ctx
->lsm
->cmd_type
!= LTTNG_REGISTER_CONSUMER
) {
904 pthread_mutex_unlock(&kconsumer_data
.pid_mutex
);
905 ret
= start_consumerd(&kconsumer_data
);
907 ret
= LTTNG_ERR_KERN_CONSUMER_FAIL
;
910 uatomic_set(&kernel_consumerd_state
, CONSUMER_STARTED
);
912 pthread_mutex_unlock(&kconsumer_data
.pid_mutex
);
916 * The consumer was just spawned so we need to add the socket to
917 * the consumer output of the session if exist.
919 ret
= consumer_create_socket(&kconsumer_data
,
920 cmd_ctx
->session
->kernel_session
->consumer
);
927 case LTTNG_DOMAIN_JUL
:
928 case LTTNG_DOMAIN_LOG4J
:
929 case LTTNG_DOMAIN_PYTHON
:
930 if (!agent_tracing_is_enabled()) {
931 ret
= LTTNG_ERR_AGENT_TRACING_DISABLED
;
935 case LTTNG_DOMAIN_UST
:
937 if (!ust_app_supported()) {
938 ret
= LTTNG_ERR_NO_UST
;
942 /* Consumer is in an ERROR state. Report back to client */
943 if (need_consumerd
&& uatomic_read(&ust_consumerd_state
) ==
945 ret
= LTTNG_ERR_NO_USTCONSUMERD
;
949 if (need_tracing_session
) {
950 /* Create UST session if none exist. */
951 if (cmd_ctx
->session
->ust_session
== NULL
) {
952 ret
= create_ust_session(cmd_ctx
->session
,
953 ALIGNED_CONST_PTR(cmd_ctx
->lsm
->domain
));
954 if (ret
!= LTTNG_OK
) {
959 /* Start the UST consumer daemons */
961 pthread_mutex_lock(&ustconsumer64_data
.pid_mutex
);
962 if (config
.consumerd64_bin_path
.value
&&
963 ustconsumer64_data
.pid
== 0 &&
964 cmd_ctx
->lsm
->cmd_type
!= LTTNG_REGISTER_CONSUMER
) {
965 pthread_mutex_unlock(&ustconsumer64_data
.pid_mutex
);
966 ret
= start_consumerd(&ustconsumer64_data
);
968 ret
= LTTNG_ERR_UST_CONSUMER64_FAIL
;
969 uatomic_set(&ust_consumerd64_fd
, -EINVAL
);
973 uatomic_set(&ust_consumerd64_fd
, ustconsumer64_data
.cmd_sock
);
974 uatomic_set(&ust_consumerd_state
, CONSUMER_STARTED
);
976 pthread_mutex_unlock(&ustconsumer64_data
.pid_mutex
);
980 * Setup socket for consumer 64 bit. No need for atomic access
981 * since it was set above and can ONLY be set in this thread.
983 ret
= consumer_create_socket(&ustconsumer64_data
,
984 cmd_ctx
->session
->ust_session
->consumer
);
990 pthread_mutex_lock(&ustconsumer32_data
.pid_mutex
);
991 if (config
.consumerd32_bin_path
.value
&&
992 ustconsumer32_data
.pid
== 0 &&
993 cmd_ctx
->lsm
->cmd_type
!= LTTNG_REGISTER_CONSUMER
) {
994 pthread_mutex_unlock(&ustconsumer32_data
.pid_mutex
);
995 ret
= start_consumerd(&ustconsumer32_data
);
997 ret
= LTTNG_ERR_UST_CONSUMER32_FAIL
;
998 uatomic_set(&ust_consumerd32_fd
, -EINVAL
);
1002 uatomic_set(&ust_consumerd32_fd
, ustconsumer32_data
.cmd_sock
);
1003 uatomic_set(&ust_consumerd_state
, CONSUMER_STARTED
);
1005 pthread_mutex_unlock(&ustconsumer32_data
.pid_mutex
);
1009 * Setup socket for consumer 32 bit. No need for atomic access
1010 * since it was set above and can ONLY be set in this thread.
1012 ret
= consumer_create_socket(&ustconsumer32_data
,
1013 cmd_ctx
->session
->ust_session
->consumer
);
1025 /* Validate consumer daemon state when start/stop trace command */
1026 if (cmd_ctx
->lsm
->cmd_type
== LTTNG_START_TRACE
||
1027 cmd_ctx
->lsm
->cmd_type
== LTTNG_STOP_TRACE
) {
1028 switch (cmd_ctx
->lsm
->domain
.type
) {
1029 case LTTNG_DOMAIN_NONE
:
1031 case LTTNG_DOMAIN_JUL
:
1032 case LTTNG_DOMAIN_LOG4J
:
1033 case LTTNG_DOMAIN_PYTHON
:
1034 case LTTNG_DOMAIN_UST
:
1035 if (uatomic_read(&ust_consumerd_state
) != CONSUMER_STARTED
) {
1036 ret
= LTTNG_ERR_NO_USTCONSUMERD
;
1040 case LTTNG_DOMAIN_KERNEL
:
1041 if (uatomic_read(&kernel_consumerd_state
) != CONSUMER_STARTED
) {
1042 ret
= LTTNG_ERR_NO_KERNCONSUMERD
;
1047 ret
= LTTNG_ERR_UNKNOWN_DOMAIN
;
1053 * Check that the UID or GID match that of the tracing session.
1054 * The root user can interact with all sessions.
1056 if (need_tracing_session
) {
1057 if (!session_access_ok(cmd_ctx
->session
,
1058 LTTNG_SOCK_GET_UID_CRED(&cmd_ctx
->creds
),
1059 LTTNG_SOCK_GET_GID_CRED(&cmd_ctx
->creds
)) ||
1060 cmd_ctx
->session
->destroyed
) {
1061 ret
= LTTNG_ERR_EPERM
;
1067 * Send relayd information to consumer as soon as we have a domain and a
1070 if (cmd_ctx
->session
&& need_domain
) {
1072 * Setup relayd if not done yet. If the relayd information was already
1073 * sent to the consumer, this call will gracefully return.
1075 ret
= cmd_setup_relayd(cmd_ctx
->session
);
1076 if (ret
!= LTTNG_OK
) {
1081 /* Process by command type */
1082 switch (cmd_ctx
->lsm
->cmd_type
) {
1083 case LTTNG_ADD_CONTEXT
:
1086 * An LTTNG_ADD_CONTEXT command might have a supplementary
1087 * payload if the context being added is an application context.
1089 if (cmd_ctx
->lsm
->u
.context
.ctx
.ctx
==
1090 LTTNG_EVENT_CONTEXT_APP_CONTEXT
) {
1091 char *provider_name
= NULL
, *context_name
= NULL
;
1092 size_t provider_name_len
=
1093 cmd_ctx
->lsm
->u
.context
.provider_name_len
;
1094 size_t context_name_len
=
1095 cmd_ctx
->lsm
->u
.context
.context_name_len
;
1097 if (provider_name_len
== 0 || context_name_len
== 0) {
1099 * Application provider and context names MUST
1102 ret
= -LTTNG_ERR_INVALID
;
1106 provider_name
= zmalloc(provider_name_len
+ 1);
1107 if (!provider_name
) {
1108 ret
= -LTTNG_ERR_NOMEM
;
1111 cmd_ctx
->lsm
->u
.context
.ctx
.u
.app_ctx
.provider_name
=
1114 context_name
= zmalloc(context_name_len
+ 1);
1115 if (!context_name
) {
1116 ret
= -LTTNG_ERR_NOMEM
;
1117 goto error_add_context
;
1119 cmd_ctx
->lsm
->u
.context
.ctx
.u
.app_ctx
.ctx_name
=
1122 ret
= lttcomm_recv_unix_sock(*sock
, provider_name
,
1125 goto error_add_context
;
1128 ret
= lttcomm_recv_unix_sock(*sock
, context_name
,
1131 goto error_add_context
;
1136 * cmd_add_context assumes ownership of the provider and context
1139 ret
= cmd_add_context(cmd_ctx
->session
,
1140 cmd_ctx
->lsm
->domain
.type
,
1141 cmd_ctx
->lsm
->u
.context
.channel_name
,
1142 ALIGNED_CONST_PTR(cmd_ctx
->lsm
->u
.context
.ctx
),
1143 kernel_poll_pipe
[1]);
1145 cmd_ctx
->lsm
->u
.context
.ctx
.u
.app_ctx
.provider_name
= NULL
;
1146 cmd_ctx
->lsm
->u
.context
.ctx
.u
.app_ctx
.ctx_name
= NULL
;
1148 free(cmd_ctx
->lsm
->u
.context
.ctx
.u
.app_ctx
.provider_name
);
1149 free(cmd_ctx
->lsm
->u
.context
.ctx
.u
.app_ctx
.ctx_name
);
1155 case LTTNG_DISABLE_CHANNEL
:
1157 ret
= cmd_disable_channel(cmd_ctx
->session
, cmd_ctx
->lsm
->domain
.type
,
1158 cmd_ctx
->lsm
->u
.disable
.channel_name
);
1161 case LTTNG_DISABLE_EVENT
:
1165 * FIXME: handle filter; for now we just receive the filter's
1166 * bytecode along with the filter expression which are sent by
1167 * liblttng-ctl and discard them.
1169 * This fixes an issue where the client may block while sending
1170 * the filter payload and encounter an error because the session
1171 * daemon closes the socket without ever handling this data.
1173 size_t count
= cmd_ctx
->lsm
->u
.disable
.expression_len
+
1174 cmd_ctx
->lsm
->u
.disable
.bytecode_len
;
1177 char data
[LTTNG_FILTER_MAX_LEN
];
1179 DBG("Discarding disable event command payload of size %zu", count
);
1181 ret
= lttcomm_recv_unix_sock(*sock
, data
,
1182 count
> sizeof(data
) ? sizeof(data
) : count
);
1187 count
-= (size_t) ret
;
1190 ret
= cmd_disable_event(cmd_ctx
->session
, cmd_ctx
->lsm
->domain
.type
,
1191 cmd_ctx
->lsm
->u
.disable
.channel_name
,
1192 ALIGNED_CONST_PTR(cmd_ctx
->lsm
->u
.disable
.event
));
1195 case LTTNG_ENABLE_CHANNEL
:
1197 cmd_ctx
->lsm
->u
.channel
.chan
.attr
.extended
.ptr
=
1198 (struct lttng_channel_extended
*) &cmd_ctx
->lsm
->u
.channel
.extended
;
1199 ret
= cmd_enable_channel(cmd_ctx
->session
,
1200 ALIGNED_CONST_PTR(cmd_ctx
->lsm
->domain
),
1201 ALIGNED_CONST_PTR(cmd_ctx
->lsm
->u
.channel
.chan
),
1202 kernel_poll_pipe
[1]);
1205 case LTTNG_PROCESS_ATTR_TRACKER_ADD_INCLUDE_VALUE
:
1206 case LTTNG_PROCESS_ATTR_TRACKER_REMOVE_INCLUDE_VALUE
:
1208 struct lttng_dynamic_buffer payload
;
1209 struct lttng_buffer_view payload_view
;
1210 const bool add_value
=
1211 cmd_ctx
->lsm
->cmd_type
==
1212 LTTNG_PROCESS_ATTR_TRACKER_ADD_INCLUDE_VALUE
;
1213 const size_t name_len
=
1214 cmd_ctx
->lsm
->u
.process_attr_tracker_add_remove_include_value
1216 const enum lttng_domain_type domain_type
=
1217 (enum lttng_domain_type
)
1218 cmd_ctx
->lsm
->domain
.type
;
1219 const enum lttng_process_attr process_attr
=
1220 (enum lttng_process_attr
) cmd_ctx
->lsm
->u
1221 .process_attr_tracker_add_remove_include_value
1223 const enum lttng_process_attr_value_type value_type
=
1224 (enum lttng_process_attr_value_type
) cmd_ctx
1226 .process_attr_tracker_add_remove_include_value
1228 struct process_attr_value
*value
;
1229 enum lttng_error_code ret_code
;
1231 /* Receive remaining variable length payload if applicable. */
1232 if (name_len
> LOGIN_NAME_MAX
) {
1234 * POSIX mandates user and group names that are at least
1235 * 8 characters long. Note that although shadow-utils
1236 * (useradd, groupaadd, etc.) use 32 chars as their
1237 * limit (from bits/utmp.h, UT_NAMESIZE),
1238 * LOGIN_NAME_MAX is defined to 256.
1240 ERR("Rejecting process attribute tracker value %s as the provided exceeds the maximal allowed length: argument length = %zu, maximal length = %d",
1241 add_value
? "addition" : "removal",
1242 name_len
, LOGIN_NAME_MAX
);
1243 ret
= LTTNG_ERR_INVALID
;
1247 lttng_dynamic_buffer_init(&payload
);
1248 if (name_len
!= 0) {
1250 * Receive variable payload for user/group name
1253 ret
= lttng_dynamic_buffer_set_size(&payload
, name_len
);
1255 ERR("Failed to allocate buffer to receive payload of %s process attribute tracker value argument",
1256 add_value
? "add" : "remove");
1257 ret
= LTTNG_ERR_NOMEM
;
1258 goto error_add_remove_tracker_value
;
1261 ret
= lttcomm_recv_unix_sock(
1262 *sock
, payload
.data
, name_len
);
1264 ERR("Failed to receive payload of %s process attribute tracker value argument",
1265 add_value
? "add" : "remove");
1267 ret
= LTTNG_ERR_INVALID_PROTOCOL
;
1268 goto error_add_remove_tracker_value
;
1272 payload_view
= lttng_buffer_view_from_dynamic_buffer(
1273 &payload
, 0, name_len
);
1275 * Validate the value type and domains are legal for the process
1276 * attribute tracker that is specified and convert the value to
1277 * add/remove to the internal sessiond representation.
1279 ret_code
= process_attr_value_from_comm(domain_type
,
1280 process_attr
, value_type
,
1281 &cmd_ctx
->lsm
->u
.process_attr_tracker_add_remove_include_value
1283 &payload_view
, &value
);
1284 if (ret_code
!= LTTNG_OK
) {
1286 goto error_add_remove_tracker_value
;
1290 ret
= cmd_process_attr_tracker_inclusion_set_add_value(
1291 cmd_ctx
->session
, domain_type
,
1292 process_attr
, value
);
1294 ret
= cmd_process_attr_tracker_inclusion_set_remove_value(
1295 cmd_ctx
->session
, domain_type
,
1296 process_attr
, value
);
1298 process_attr_value_destroy(value
);
1299 error_add_remove_tracker_value
:
1300 lttng_dynamic_buffer_reset(&payload
);
1303 case LTTNG_PROCESS_ATTR_TRACKER_GET_POLICY
:
1305 enum lttng_tracking_policy tracking_policy
;
1306 const enum lttng_domain_type domain_type
=
1307 (enum lttng_domain_type
)
1308 cmd_ctx
->lsm
->domain
.type
;
1309 const enum lttng_process_attr process_attr
=
1310 (enum lttng_process_attr
) cmd_ctx
->lsm
->u
1311 .process_attr_tracker_get_tracking_policy
1314 ret
= cmd_process_attr_tracker_get_tracking_policy(
1315 cmd_ctx
->session
, domain_type
, process_attr
,
1317 if (ret
!= LTTNG_OK
) {
1321 ret
= setup_lttng_msg_no_cmd_header(cmd_ctx
,
1322 &(uint32_t){tracking_policy
}, sizeof(uint32_t));
1324 ret
= LTTNG_ERR_NOMEM
;
1330 case LTTNG_PROCESS_ATTR_TRACKER_SET_POLICY
:
1332 const enum lttng_tracking_policy tracking_policy
=
1333 (enum lttng_tracking_policy
) cmd_ctx
->lsm
->u
1334 .process_attr_tracker_set_tracking_policy
1336 const enum lttng_domain_type domain_type
=
1337 (enum lttng_domain_type
)
1338 cmd_ctx
->lsm
->domain
.type
;
1339 const enum lttng_process_attr process_attr
=
1340 (enum lttng_process_attr
) cmd_ctx
->lsm
->u
1341 .process_attr_tracker_set_tracking_policy
1344 ret
= cmd_process_attr_tracker_set_tracking_policy(
1345 cmd_ctx
->session
, domain_type
, process_attr
,
1347 if (ret
!= LTTNG_OK
) {
1352 case LTTNG_PROCESS_ATTR_TRACKER_GET_INCLUSION_SET
:
1354 struct lttng_process_attr_values
*values
;
1355 struct lttng_dynamic_buffer reply
;
1356 const enum lttng_domain_type domain_type
=
1357 (enum lttng_domain_type
)
1358 cmd_ctx
->lsm
->domain
.type
;
1359 const enum lttng_process_attr process_attr
=
1360 (enum lttng_process_attr
) cmd_ctx
->lsm
->u
1361 .process_attr_tracker_get_inclusion_set
1364 ret
= cmd_process_attr_tracker_get_inclusion_set(
1365 cmd_ctx
->session
, domain_type
, process_attr
,
1367 if (ret
!= LTTNG_OK
) {
1371 lttng_dynamic_buffer_init(&reply
);
1372 ret
= lttng_process_attr_values_serialize(values
, &reply
);
1374 goto error_tracker_get_inclusion_set
;
1377 ret
= setup_lttng_msg_no_cmd_header(
1378 cmd_ctx
, reply
.data
, reply
.size
);
1380 ret
= LTTNG_ERR_NOMEM
;
1381 goto error_tracker_get_inclusion_set
;
1385 error_tracker_get_inclusion_set
:
1386 lttng_process_attr_values_destroy(values
);
1387 lttng_dynamic_buffer_reset(&reply
);
1390 case LTTNG_ENABLE_EVENT
:
1392 struct lttng_event
*ev
= NULL
;
1393 struct lttng_event_exclusion
*exclusion
= NULL
;
1394 struct lttng_bytecode
*bytecode
= NULL
;
1395 char *filter_expression
= NULL
;
1397 /* Handle exclusion events and receive it from the client. */
1398 if (cmd_ctx
->lsm
->u
.enable
.exclusion_count
> 0) {
1399 size_t count
= cmd_ctx
->lsm
->u
.enable
.exclusion_count
;
1401 exclusion
= zmalloc(sizeof(struct lttng_event_exclusion
) +
1402 (count
* LTTNG_SYMBOL_NAME_LEN
));
1404 ret
= LTTNG_ERR_EXCLUSION_NOMEM
;
1408 DBG("Receiving var len exclusion event list from client ...");
1409 exclusion
->count
= count
;
1410 ret
= lttcomm_recv_unix_sock(*sock
, exclusion
->names
,
1411 count
* LTTNG_SYMBOL_NAME_LEN
);
1413 DBG("Nothing recv() from client var len data... continuing");
1416 ret
= LTTNG_ERR_EXCLUSION_INVAL
;
1421 /* Get filter expression from client. */
1422 if (cmd_ctx
->lsm
->u
.enable
.expression_len
> 0) {
1423 size_t expression_len
=
1424 cmd_ctx
->lsm
->u
.enable
.expression_len
;
1426 if (expression_len
> LTTNG_FILTER_MAX_LEN
) {
1427 ret
= LTTNG_ERR_FILTER_INVAL
;
1432 filter_expression
= zmalloc(expression_len
);
1433 if (!filter_expression
) {
1435 ret
= LTTNG_ERR_FILTER_NOMEM
;
1439 /* Receive var. len. data */
1440 DBG("Receiving var len filter's expression from client ...");
1441 ret
= lttcomm_recv_unix_sock(*sock
, filter_expression
,
1444 DBG("Nothing recv() from client var len data... continuing");
1446 free(filter_expression
);
1448 ret
= LTTNG_ERR_FILTER_INVAL
;
1453 /* Handle filter and get bytecode from client. */
1454 if (cmd_ctx
->lsm
->u
.enable
.bytecode_len
> 0) {
1455 size_t bytecode_len
= cmd_ctx
->lsm
->u
.enable
.bytecode_len
;
1457 if (bytecode_len
> LTTNG_FILTER_MAX_LEN
) {
1458 ret
= LTTNG_ERR_FILTER_INVAL
;
1459 free(filter_expression
);
1464 bytecode
= zmalloc(bytecode_len
);
1466 free(filter_expression
);
1468 ret
= LTTNG_ERR_FILTER_NOMEM
;
1472 /* Receive var. len. data */
1473 DBG("Receiving var len filter's bytecode from client ...");
1474 ret
= lttcomm_recv_unix_sock(*sock
, bytecode
, bytecode_len
);
1476 DBG("Nothing recv() from client var len data... continuing");
1478 free(filter_expression
);
1481 ret
= LTTNG_ERR_FILTER_INVAL
;
1485 if ((bytecode
->len
+ sizeof(*bytecode
)) != bytecode_len
) {
1486 free(filter_expression
);
1489 ret
= LTTNG_ERR_FILTER_INVAL
;
1494 ev
= lttng_event_copy(ALIGNED_CONST_PTR(cmd_ctx
->lsm
->u
.enable
.event
));
1496 DBG("Failed to copy event: %s",
1497 cmd_ctx
->lsm
->u
.enable
.event
.name
);
1498 free(filter_expression
);
1501 ret
= LTTNG_ERR_NOMEM
;
1506 if (cmd_ctx
->lsm
->u
.enable
.userspace_probe_location_len
> 0) {
1507 /* Expect a userspace probe description. */
1508 ret
= receive_userspace_probe(cmd_ctx
, *sock
, sock_error
, ev
);
1510 free(filter_expression
);
1513 lttng_event_destroy(ev
);
1518 ret
= cmd_enable_event(cmd_ctx
->session
,
1519 ALIGNED_CONST_PTR(cmd_ctx
->lsm
->domain
),
1520 cmd_ctx
->lsm
->u
.enable
.channel_name
,
1522 filter_expression
, bytecode
, exclusion
,
1523 kernel_poll_pipe
[1]);
1524 lttng_event_destroy(ev
);
1527 case LTTNG_LIST_TRACEPOINTS
:
1529 struct lttng_event
*events
;
1532 session_lock_list();
1533 nb_events
= cmd_list_tracepoints(cmd_ctx
->lsm
->domain
.type
, &events
);
1534 session_unlock_list();
1535 if (nb_events
< 0) {
1536 /* Return value is a negative lttng_error_code. */
1542 * Setup lttng message with payload size set to the event list size in
1543 * bytes and then copy list into the llm payload.
1545 ret
= setup_lttng_msg_no_cmd_header(cmd_ctx
, events
,
1546 sizeof(struct lttng_event
) * nb_events
);
1556 case LTTNG_LIST_TRACEPOINT_FIELDS
:
1558 struct lttng_event_field
*fields
;
1561 session_lock_list();
1562 nb_fields
= cmd_list_tracepoint_fields(cmd_ctx
->lsm
->domain
.type
,
1564 session_unlock_list();
1565 if (nb_fields
< 0) {
1566 /* Return value is a negative lttng_error_code. */
1572 * Setup lttng message with payload size set to the event list size in
1573 * bytes and then copy list into the llm payload.
1575 ret
= setup_lttng_msg_no_cmd_header(cmd_ctx
, fields
,
1576 sizeof(struct lttng_event_field
) * nb_fields
);
1586 case LTTNG_LIST_SYSCALLS
:
1588 struct lttng_event
*events
;
1591 nb_events
= cmd_list_syscalls(&events
);
1592 if (nb_events
< 0) {
1593 /* Return value is a negative lttng_error_code. */
1599 * Setup lttng message with payload size set to the event list size in
1600 * bytes and then copy list into the llm payload.
1602 ret
= setup_lttng_msg_no_cmd_header(cmd_ctx
, events
,
1603 sizeof(struct lttng_event
) * nb_events
);
1613 case LTTNG_SET_CONSUMER_URI
:
1616 struct lttng_uri
*uris
;
1618 nb_uri
= cmd_ctx
->lsm
->u
.uri
.size
;
1619 len
= nb_uri
* sizeof(struct lttng_uri
);
1622 ret
= LTTNG_ERR_INVALID
;
1626 uris
= zmalloc(len
);
1628 ret
= LTTNG_ERR_FATAL
;
1632 /* Receive variable len data */
1633 DBG("Receiving %zu URI(s) from client ...", nb_uri
);
1634 ret
= lttcomm_recv_unix_sock(*sock
, uris
, len
);
1636 DBG("No URIs received from client... continuing");
1638 ret
= LTTNG_ERR_SESSION_FAIL
;
1643 ret
= cmd_set_consumer_uri(cmd_ctx
->session
, nb_uri
, uris
);
1645 if (ret
!= LTTNG_OK
) {
1652 case LTTNG_START_TRACE
:
1655 * On the first start, if we have a kernel session and we have
1656 * enabled time or size-based rotations, we have to make sure
1657 * the kernel tracer supports it.
1659 if (!cmd_ctx
->session
->has_been_started
&& \
1660 cmd_ctx
->session
->kernel_session
&& \
1661 (cmd_ctx
->session
->rotate_timer_period
|| \
1662 cmd_ctx
->session
->rotate_size
) && \
1663 !check_rotate_compatible()) {
1664 DBG("Kernel tracer version is not compatible with the rotation feature");
1665 ret
= LTTNG_ERR_ROTATION_WRONG_VERSION
;
1668 ret
= cmd_start_trace(cmd_ctx
->session
);
1671 case LTTNG_STOP_TRACE
:
1673 ret
= cmd_stop_trace(cmd_ctx
->session
);
1676 case LTTNG_DESTROY_SESSION
:
1678 ret
= cmd_destroy_session(cmd_ctx
->session
,
1679 notification_thread_handle
,
1683 case LTTNG_LIST_DOMAINS
:
1686 struct lttng_domain
*domains
= NULL
;
1688 nb_dom
= cmd_list_domains(cmd_ctx
->session
, &domains
);
1690 /* Return value is a negative lttng_error_code. */
1695 ret
= setup_lttng_msg_no_cmd_header(cmd_ctx
, domains
,
1696 nb_dom
* sizeof(struct lttng_domain
));
1706 case LTTNG_LIST_CHANNELS
:
1708 ssize_t payload_size
;
1709 struct lttng_channel
*channels
= NULL
;
1711 payload_size
= cmd_list_channels(cmd_ctx
->lsm
->domain
.type
,
1712 cmd_ctx
->session
, &channels
);
1713 if (payload_size
< 0) {
1714 /* Return value is a negative lttng_error_code. */
1715 ret
= -payload_size
;
1719 ret
= setup_lttng_msg_no_cmd_header(cmd_ctx
, channels
,
1730 case LTTNG_LIST_EVENTS
:
1733 struct lttng_event
*events
= NULL
;
1734 struct lttcomm_event_command_header cmd_header
;
1737 memset(&cmd_header
, 0, sizeof(cmd_header
));
1738 /* Extended infos are included at the end of events */
1739 nb_event
= cmd_list_events(cmd_ctx
->lsm
->domain
.type
,
1740 cmd_ctx
->session
, cmd_ctx
->lsm
->u
.list
.channel_name
,
1741 &events
, &total_size
);
1744 /* Return value is a negative lttng_error_code. */
1749 cmd_header
.nb_events
= nb_event
;
1750 ret
= setup_lttng_msg(cmd_ctx
, events
, total_size
,
1751 &cmd_header
, sizeof(cmd_header
));
1761 case LTTNG_LIST_SESSIONS
:
1763 unsigned int nr_sessions
;
1764 void *sessions_payload
;
1767 session_lock_list();
1768 nr_sessions
= lttng_sessions_count(
1769 LTTNG_SOCK_GET_UID_CRED(&cmd_ctx
->creds
),
1770 LTTNG_SOCK_GET_GID_CRED(&cmd_ctx
->creds
));
1772 payload_len
= (sizeof(struct lttng_session
) * nr_sessions
) +
1773 (sizeof(struct lttng_session_extended
) * nr_sessions
);
1774 sessions_payload
= zmalloc(payload_len
);
1776 if (!sessions_payload
) {
1777 session_unlock_list();
1782 cmd_list_lttng_sessions(sessions_payload
, nr_sessions
,
1783 LTTNG_SOCK_GET_UID_CRED(&cmd_ctx
->creds
),
1784 LTTNG_SOCK_GET_GID_CRED(&cmd_ctx
->creds
));
1785 session_unlock_list();
1787 ret
= setup_lttng_msg_no_cmd_header(cmd_ctx
, sessions_payload
,
1789 free(sessions_payload
);
1798 case LTTNG_REGISTER_CONSUMER
:
1800 struct consumer_data
*cdata
;
1802 switch (cmd_ctx
->lsm
->domain
.type
) {
1803 case LTTNG_DOMAIN_KERNEL
:
1804 cdata
= &kconsumer_data
;
1807 ret
= LTTNG_ERR_UND
;
1811 ret
= cmd_register_consumer(cmd_ctx
->session
, cmd_ctx
->lsm
->domain
.type
,
1812 cmd_ctx
->lsm
->u
.reg
.path
, cdata
);
1815 case LTTNG_DATA_PENDING
:
1818 uint8_t pending_ret_byte
;
1820 pending_ret
= cmd_data_pending(cmd_ctx
->session
);
1825 * This function may returns 0 or 1 to indicate whether or not
1826 * there is data pending. In case of error, it should return an
1827 * LTTNG_ERR code. However, some code paths may still return
1828 * a nondescript error code, which we handle by returning an
1831 if (pending_ret
== 0 || pending_ret
== 1) {
1833 * ret will be set to LTTNG_OK at the end of
1836 } else if (pending_ret
< 0) {
1837 ret
= LTTNG_ERR_UNK
;
1844 pending_ret_byte
= (uint8_t) pending_ret
;
1846 /* 1 byte to return whether or not data is pending */
1847 ret
= setup_lttng_msg_no_cmd_header(cmd_ctx
,
1848 &pending_ret_byte
, 1);
1857 case LTTNG_SNAPSHOT_ADD_OUTPUT
:
1859 uint32_t snapshot_id
;
1860 struct lttcomm_lttng_output_id reply
;
1862 ret
= cmd_snapshot_add_output(cmd_ctx
->session
,
1863 ALIGNED_CONST_PTR(cmd_ctx
->lsm
->u
.snapshot_output
.output
),
1865 if (ret
!= LTTNG_OK
) {
1868 reply
.id
= snapshot_id
;
1870 ret
= setup_lttng_msg_no_cmd_header(cmd_ctx
, &reply
,
1876 /* Copy output list into message payload */
1880 case LTTNG_SNAPSHOT_DEL_OUTPUT
:
1882 ret
= cmd_snapshot_del_output(cmd_ctx
->session
,
1883 ALIGNED_CONST_PTR(cmd_ctx
->lsm
->u
.snapshot_output
.output
));
1886 case LTTNG_SNAPSHOT_LIST_OUTPUT
:
1889 struct lttng_snapshot_output
*outputs
= NULL
;
1891 nb_output
= cmd_snapshot_list_outputs(cmd_ctx
->session
, &outputs
);
1892 if (nb_output
< 0) {
1897 assert((nb_output
> 0 && outputs
) || nb_output
== 0);
1898 ret
= setup_lttng_msg_no_cmd_header(cmd_ctx
, outputs
,
1899 nb_output
* sizeof(struct lttng_snapshot_output
));
1909 case LTTNG_SNAPSHOT_RECORD
:
1911 ret
= cmd_snapshot_record(cmd_ctx
->session
,
1912 ALIGNED_CONST_PTR(cmd_ctx
->lsm
->u
.snapshot_record
.output
),
1913 cmd_ctx
->lsm
->u
.snapshot_record
.wait
);
1916 case LTTNG_CREATE_SESSION_EXT
:
1918 struct lttng_dynamic_buffer payload
;
1919 struct lttng_session_descriptor
*return_descriptor
= NULL
;
1921 lttng_dynamic_buffer_init(&payload
);
1922 ret
= cmd_create_session(cmd_ctx
, *sock
, &return_descriptor
);
1923 if (ret
!= LTTNG_OK
) {
1927 ret
= lttng_session_descriptor_serialize(return_descriptor
,
1930 ERR("Failed to serialize session descriptor in reply to \"create session\" command");
1931 lttng_session_descriptor_destroy(return_descriptor
);
1932 ret
= LTTNG_ERR_NOMEM
;
1935 ret
= setup_lttng_msg_no_cmd_header(cmd_ctx
, payload
.data
,
1938 lttng_session_descriptor_destroy(return_descriptor
);
1939 ret
= LTTNG_ERR_NOMEM
;
1942 lttng_dynamic_buffer_reset(&payload
);
1943 lttng_session_descriptor_destroy(return_descriptor
);
1947 case LTTNG_SAVE_SESSION
:
1949 ret
= cmd_save_sessions(&cmd_ctx
->lsm
->u
.save_session
.attr
,
1953 case LTTNG_SET_SESSION_SHM_PATH
:
1955 ret
= cmd_set_session_shm_path(cmd_ctx
->session
,
1956 cmd_ctx
->lsm
->u
.set_shm_path
.shm_path
);
1959 case LTTNG_REGENERATE_METADATA
:
1961 ret
= cmd_regenerate_metadata(cmd_ctx
->session
);
1964 case LTTNG_REGENERATE_STATEDUMP
:
1966 ret
= cmd_regenerate_statedump(cmd_ctx
->session
);
1969 case LTTNG_REGISTER_TRIGGER
:
1971 struct lttng_dynamic_buffer payload
;
1972 struct lttng_trigger
*return_trigger
;
1974 lttng_dynamic_buffer_init(&payload
);
1975 ret
= cmd_register_trigger(cmd_ctx
, *sock
,
1976 notification_thread_handle
, &return_trigger
);
1977 if (ret
!= LTTNG_OK
) {
1981 ret
= lttng_trigger_serialize(return_trigger
, &payload
, NULL
);
1983 ERR("Failed to serialize trigger in reply to \"register trigger\" command");
1984 ret
= LTTNG_ERR_NOMEM
;
1985 lttng_trigger_destroy(return_trigger
);
1988 ret
= setup_lttng_msg_no_cmd_header(cmd_ctx
, payload
.data
,
1991 lttng_trigger_destroy(return_trigger
);
1992 ret
= LTTNG_ERR_NOMEM
;
1995 lttng_trigger_destroy(return_trigger
);
1996 lttng_dynamic_buffer_reset(&payload
);
2000 case LTTNG_UNREGISTER_TRIGGER
:
2002 ret
= cmd_unregister_trigger(cmd_ctx
, *sock
,
2003 notification_thread_handle
);
2006 case LTTNG_ROTATE_SESSION
:
2008 struct lttng_rotate_session_return rotate_return
;
2010 DBG("Client rotate session \"%s\"", cmd_ctx
->session
->name
);
2012 memset(&rotate_return
, 0, sizeof(rotate_return
));
2013 if (cmd_ctx
->session
->kernel_session
&& !check_rotate_compatible()) {
2014 DBG("Kernel tracer version is not compatible with the rotation feature");
2015 ret
= LTTNG_ERR_ROTATION_WRONG_VERSION
;
2019 ret
= cmd_rotate_session(cmd_ctx
->session
, &rotate_return
,
2021 LTTNG_TRACE_CHUNK_COMMAND_TYPE_MOVE_TO_COMPLETED
);
2027 ret
= setup_lttng_msg_no_cmd_header(cmd_ctx
, &rotate_return
,
2028 sizeof(rotate_return
));
2037 case LTTNG_ROTATION_GET_INFO
:
2039 struct lttng_rotation_get_info_return get_info_return
;
2041 memset(&get_info_return
, 0, sizeof(get_info_return
));
2042 ret
= cmd_rotate_get_info(cmd_ctx
->session
, &get_info_return
,
2043 cmd_ctx
->lsm
->u
.get_rotation_info
.rotation_id
);
2049 ret
= setup_lttng_msg_no_cmd_header(cmd_ctx
, &get_info_return
,
2050 sizeof(get_info_return
));
2059 case LTTNG_ROTATION_SET_SCHEDULE
:
2062 enum lttng_rotation_schedule_type schedule_type
;
2065 if (cmd_ctx
->session
->kernel_session
&& !check_rotate_compatible()) {
2066 DBG("Kernel tracer version does not support session rotations");
2067 ret
= LTTNG_ERR_ROTATION_WRONG_VERSION
;
2071 set_schedule
= cmd_ctx
->lsm
->u
.rotation_set_schedule
.set
== 1;
2072 schedule_type
= (enum lttng_rotation_schedule_type
) cmd_ctx
->lsm
->u
.rotation_set_schedule
.type
;
2073 value
= cmd_ctx
->lsm
->u
.rotation_set_schedule
.value
;
2075 ret
= cmd_rotation_set_schedule(cmd_ctx
->session
,
2079 notification_thread_handle
);
2080 if (ret
!= LTTNG_OK
) {
2086 case LTTNG_SESSION_LIST_ROTATION_SCHEDULES
:
2088 struct lttng_session_list_schedules_return schedules
= {
2089 .periodic
.set
= !!cmd_ctx
->session
->rotate_timer_period
,
2090 .periodic
.value
= cmd_ctx
->session
->rotate_timer_period
,
2091 .size
.set
= !!cmd_ctx
->session
->rotate_size
,
2092 .size
.value
= cmd_ctx
->session
->rotate_size
,
2095 ret
= setup_lttng_msg_no_cmd_header(cmd_ctx
, &schedules
,
2105 case LTTNG_CLEAR_SESSION
:
2107 ret
= cmd_clear_session(cmd_ctx
->session
, sock
);
2110 case LTTNG_LIST_TRIGGERS
:
2112 struct lttng_dynamic_buffer payload
;
2113 struct lttng_triggers
*return_triggers
;
2115 lttng_dynamic_buffer_init(&payload
);
2116 ret
= cmd_list_triggers(cmd_ctx
, *sock
,
2117 notification_thread_handle
, &return_triggers
);
2118 if (ret
!= LTTNG_OK
) {
2122 ret
= lttng_triggers_serialize(return_triggers
, &payload
);
2124 ERR("Failed to serialize triggers in reply to \"list triggers\" command");
2125 ret
= LTTNG_ERR_NOMEM
;
2126 lttng_triggers_destroy(return_triggers
);
2129 ret
= setup_lttng_msg_no_cmd_header(cmd_ctx
, payload
.data
,
2132 ret
= LTTNG_ERR_NOMEM
;
2133 lttng_triggers_destroy(return_triggers
);
2136 lttng_dynamic_buffer_reset(&payload
);
2137 lttng_triggers_destroy(return_triggers
);
2142 ret
= LTTNG_ERR_UND
;
2147 if (cmd_ctx
->llm
== NULL
) {
2148 DBG("Missing llm structure. Allocating one.");
2149 if (setup_lttng_msg_no_cmd_header(cmd_ctx
, NULL
, 0) < 0) {
2153 /* Set return code */
2154 cmd_ctx
->llm
->ret_code
= ret
;
2156 if (cmd_ctx
->session
) {
2157 session_unlock(cmd_ctx
->session
);
2158 session_put(cmd_ctx
->session
);
2159 cmd_ctx
->session
= NULL
;
2161 if (need_tracing_session
) {
2162 session_unlock_list();
2165 assert(!rcu_read_ongoing());
2169 static int create_client_sock(void)
2171 int ret
, client_sock
;
2172 const mode_t old_umask
= umask(0);
2174 /* Create client tool unix socket */
2175 client_sock
= lttcomm_create_unix_sock(config
.client_unix_sock_path
.value
);
2176 if (client_sock
< 0) {
2177 ERR("Create unix sock failed: %s", config
.client_unix_sock_path
.value
);
2182 /* Set the cloexec flag */
2183 ret
= utils_set_fd_cloexec(client_sock
);
2185 ERR("Unable to set CLOEXEC flag to the client Unix socket (fd: %d). "
2186 "Continuing but note that the consumer daemon will have a "
2187 "reference to this socket on exec()", client_sock
);
2190 /* File permission MUST be 660 */
2191 ret
= chmod(config
.client_unix_sock_path
.value
, S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
);
2193 ERR("Set file permissions failed: %s",
2194 config
.client_unix_sock_path
.value
);
2196 (void) lttcomm_close_unix_sock(client_sock
);
2200 DBG("Created client socket (fd = %i)", client_sock
);
2207 static void cleanup_client_thread(void *data
)
2209 struct lttng_pipe
*quit_pipe
= data
;
2211 lttng_pipe_destroy(quit_pipe
);
2214 static void thread_init_cleanup(void *data
)
2216 set_thread_status(false);
2220 * This thread manage all clients request using the unix client socket for
2223 static void *thread_manage_clients(void *data
)
2225 int sock
= -1, ret
, i
, pollfd
, err
= -1;
2227 uint32_t revents
, nb_fd
;
2228 struct command_ctx
*cmd_ctx
= NULL
;
2229 struct lttng_poll_event events
;
2230 const int client_sock
= thread_state
.client_sock
;
2231 struct lttng_pipe
*quit_pipe
= data
;
2232 const int thread_quit_pipe_fd
= lttng_pipe_get_readfd(quit_pipe
);
2234 DBG("[thread] Manage client started");
2236 is_root
= (getuid() == 0);
2238 pthread_cleanup_push(thread_init_cleanup
, NULL
);
2240 rcu_register_thread();
2242 health_register(health_sessiond
, HEALTH_SESSIOND_TYPE_CMD
);
2244 health_code_update();
2246 ret
= lttcomm_listen_unix_sock(client_sock
);
2252 * Pass 2 as size here for the thread quit pipe and client_sock. Nothing
2253 * more will be added to this poll set.
2255 ret
= lttng_poll_create(&events
, 2, LTTNG_CLOEXEC
);
2257 goto error_create_poll
;
2260 /* Add the application registration socket */
2261 ret
= lttng_poll_add(&events
, client_sock
, LPOLLIN
| LPOLLPRI
);
2266 /* Add thread quit pipe */
2267 ret
= lttng_poll_add(&events
, thread_quit_pipe_fd
, LPOLLIN
| LPOLLERR
);
2272 /* Set state as running. */
2273 set_thread_status(true);
2274 pthread_cleanup_pop(0);
2276 /* This testpoint is after we signal readiness to the parent. */
2277 if (testpoint(sessiond_thread_manage_clients
)) {
2281 if (testpoint(sessiond_thread_manage_clients_before_loop
)) {
2285 health_code_update();
2288 const struct cmd_completion_handler
*cmd_completion_handler
;
2290 DBG("Accepting client command ...");
2292 /* Inifinite blocking call, waiting for transmission */
2294 health_poll_entry();
2295 ret
= lttng_poll_wait(&events
, -1);
2299 * Restart interrupted system call.
2301 if (errno
== EINTR
) {
2309 for (i
= 0; i
< nb_fd
; i
++) {
2310 revents
= LTTNG_POLL_GETEV(&events
, i
);
2311 pollfd
= LTTNG_POLL_GETFD(&events
, i
);
2313 health_code_update();
2315 if (pollfd
== thread_quit_pipe_fd
) {
2319 /* Event on the registration socket */
2320 if (revents
& LPOLLIN
) {
2322 } else if (revents
& (LPOLLERR
| LPOLLHUP
| LPOLLRDHUP
)) {
2323 ERR("Client socket poll error");
2326 ERR("Unexpected poll events %u for sock %d", revents
, pollfd
);
2332 DBG("Wait for client response");
2334 health_code_update();
2336 sock
= lttcomm_accept_unix_sock(client_sock
);
2342 * Set the CLOEXEC flag. Return code is useless because either way, the
2345 (void) utils_set_fd_cloexec(sock
);
2347 /* Set socket option for credentials retrieval */
2348 ret
= lttcomm_setsockopt_creds_unix_sock(sock
);
2353 /* Allocate context command to process the client request */
2354 cmd_ctx
= zmalloc(sizeof(struct command_ctx
));
2355 if (cmd_ctx
== NULL
) {
2356 PERROR("zmalloc cmd_ctx");
2360 /* Allocate data buffer for reception */
2361 cmd_ctx
->lsm
= zmalloc(sizeof(struct lttcomm_session_msg
));
2362 if (cmd_ctx
->lsm
== NULL
) {
2363 PERROR("zmalloc cmd_ctx->lsm");
2367 cmd_ctx
->llm
= NULL
;
2368 cmd_ctx
->session
= NULL
;
2370 health_code_update();
2373 * Data is received from the lttng client. The struct
2374 * lttcomm_session_msg (lsm) contains the command and data request of
2377 DBG("Receiving data from client ...");
2378 ret
= lttcomm_recv_creds_unix_sock(sock
, cmd_ctx
->lsm
,
2379 sizeof(struct lttcomm_session_msg
), &cmd_ctx
->creds
);
2381 DBG("Nothing recv() from client... continuing");
2387 clean_command_ctx(&cmd_ctx
);
2391 health_code_update();
2393 // TODO: Validate cmd_ctx including sanity check for
2394 // security purpose.
2396 rcu_thread_online();
2398 * This function dispatch the work to the kernel or userspace tracer
2399 * libs and fill the lttcomm_lttng_msg data structure of all the needed
2400 * informations for the client. The command context struct contains
2401 * everything this function may needs.
2403 ret
= process_client_msg(cmd_ctx
, &sock
, &sock_error
);
2404 rcu_thread_offline();
2414 * TODO: Inform client somehow of the fatal error. At
2415 * this point, ret < 0 means that a zmalloc failed
2416 * (ENOMEM). Error detected but still accept
2417 * command, unless a socket error has been
2420 clean_command_ctx(&cmd_ctx
);
2424 cmd_completion_handler
= cmd_pop_completion_handler();
2425 if (cmd_completion_handler
) {
2426 enum lttng_error_code completion_code
;
2428 completion_code
= cmd_completion_handler
->run(
2429 cmd_completion_handler
->data
);
2430 if (completion_code
!= LTTNG_OK
) {
2431 clean_command_ctx(&cmd_ctx
);
2436 health_code_update();
2439 DBG("Sending response (size: %d, retcode: %s (%d))",
2440 cmd_ctx
->lttng_msg_size
,
2441 lttng_strerror(-cmd_ctx
->llm
->ret_code
),
2442 cmd_ctx
->llm
->ret_code
);
2443 ret
= send_unix_sock(sock
, cmd_ctx
->llm
,
2444 cmd_ctx
->lttng_msg_size
);
2446 ERR("Failed to send data back to client");
2449 /* End of transmission */
2457 clean_command_ctx(&cmd_ctx
);
2459 health_code_update();
2471 lttng_poll_clean(&events
);
2472 clean_command_ctx(&cmd_ctx
);
2476 unlink(config
.client_unix_sock_path
.value
);
2477 ret
= close(client_sock
);
2484 ERR("Health error occurred in %s", __func__
);
2487 health_unregister(health_sessiond
);
2489 DBG("Client thread dying");
2491 rcu_unregister_thread();
2496 bool shutdown_client_thread(void *thread_data
)
2498 struct lttng_pipe
*client_quit_pipe
= thread_data
;
2499 const int write_fd
= lttng_pipe_get_writefd(client_quit_pipe
);
2501 return notify_thread_pipe(write_fd
) == 1;
2504 struct lttng_thread
*launch_client_thread(void)
2506 bool thread_running
;
2507 struct lttng_pipe
*client_quit_pipe
;
2508 struct lttng_thread
*thread
= NULL
;
2509 int client_sock_fd
= -1;
2511 sem_init(&thread_state
.ready
, 0, 0);
2512 client_quit_pipe
= lttng_pipe_open(FD_CLOEXEC
);
2513 if (!client_quit_pipe
) {
2517 client_sock_fd
= create_client_sock();
2518 if (client_sock_fd
< 0) {
2522 thread_state
.client_sock
= client_sock_fd
;
2523 thread
= lttng_thread_create("Client management",
2524 thread_manage_clients
,
2525 shutdown_client_thread
,
2526 cleanup_client_thread
,
2531 /* The client thread now owns the client sock fd and the quit pipe. */
2532 client_sock_fd
= -1;
2533 client_quit_pipe
= NULL
;
2536 * This thread is part of the threads that need to be fully
2537 * initialized before the session daemon is marked as "ready".
2539 thread_running
= wait_thread_status();
2540 if (!thread_running
) {
2545 if (client_sock_fd
>= 0) {
2546 if (close(client_sock_fd
)) {
2547 PERROR("Failed to close client socket");
2550 lttng_thread_put(thread
);
2551 cleanup_client_thread(client_quit_pipe
);