#include "lttng-sessiond.h"
#include "health-sessiond.h"
#include "thread.h"
+#include "testpoint.h"
+
+#include "kernel.h"
+#include <common/kernel-ctl/kernel-ctl.h>
#include <urcu.h>
#include <urcu/list.h>
#include <urcu/rculfhash.h>
+
+int notifier_consumption_paused;
/*
* Destroy the thread data previously created by the init function.
*/
PERROR("close kernel consumer channel monitoring pipe");
}
}
+
end:
free(handle);
}
} else {
handle->channel_monitoring_pipes.kernel_consumer = -1;
}
+
end:
return handle;
error:
if (getuid() == 0) {
gid_t gid;
- ret = utils_get_group_id(config.tracing_group_name.value, true,
- &gid);
+ ret = utils_get_group_id(the_config.tracing_group_name.value,
+ true, &gid);
if (ret) {
/* Default to root group. */
gid = 0;
ret = cds_lfht_destroy(state->sessions_ht, NULL);
assert(!ret);
}
+ if (state->triggers_by_name_uid_ht) {
+ ret = cds_lfht_destroy(state->triggers_by_name_uid_ht, NULL);
+ assert(!ret);
+ }
+ if (state->trigger_tokens_ht) {
+ ret = cds_lfht_destroy(state->trigger_tokens_ht, NULL);
+ assert(!ret);
+ }
/*
* Must be destroyed after all channels have been destroyed.
* See comment in struct lttng_session_trigger_list.
notification_channel_socket_destroy(
state->notification_channel_socket);
}
+
+ assert(cds_list_empty(&state->tracer_event_sources_list));
+
if (state->executor) {
action_executor_destroy(state->executor);
}
memset(state, 0, sizeof(*state));
state->notification_channel_socket = -1;
+ state->trigger_id.next_tracer_token = 1;
lttng_poll_init(&state->events);
ret = notification_channel_socket_create();
if (!state->triggers_ht) {
goto error;
}
+ state->triggers_by_name_uid_ht = cds_lfht_new(DEFAULT_HT_SIZE,
+ 1, 0, CDS_LFHT_AUTO_RESIZE | CDS_LFHT_ACCOUNTING, NULL);
+ if (!state->triggers_by_name_uid_ht) {
+ goto error;
+ }
+
+ state->trigger_tokens_ht = cds_lfht_new(DEFAULT_HT_SIZE,
+ 1, 0, CDS_LFHT_AUTO_RESIZE | CDS_LFHT_ACCOUNTING, NULL);
+ if (!state->trigger_tokens_ht) {
+ goto error;
+ }
+
+ CDS_INIT_LIST_HEAD(&state->tracer_event_sources_list);
state->executor = action_executor_create(handle);
if (!state->executor) {
goto error;
}
+
+ state->restart_poll = false;
+
mark_thread_as_ready(handle);
end:
return 0;
return ret;
}
+static int handle_event_notification_pipe(int event_source_fd,
+ enum lttng_domain_type domain,
+ uint32_t revents,
+ struct notification_thread_state *state)
+{
+ int ret = 0;
+
+ if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) {
+ ret = handle_notification_thread_remove_tracer_event_source_no_result(
+ state, event_source_fd);
+ if (ret) {
+ ERR("[notification-thread] Failed to remove event notification pipe from poll set: fd = %d",
+ event_source_fd);
+ }
+ goto end;
+ }
+
+ if (testpoint(sessiond_handle_notifier_event_pipe)) {
+ ret = 0;
+ goto end;
+ }
+
+ if (caa_unlikely(notifier_consumption_paused)) {
+ DBG("Event notifier notification consumption paused, sleeping...");
+ sleep(1);
+ goto end;
+ }
+
+ ret = handle_notification_thread_event_notification(
+ state, event_source_fd, domain);
+ if (ret) {
+ ERR("[notification-thread] Event notification handling error occurred for fd: %d",
+ event_source_fd);
+ ret = -1;
+ goto end;
+ }
+
+end:
+ return ret;
+}
+
+/*
+ * Return the event source domain type via parameter.
+ */
+static bool fd_is_event_notification_source(const struct notification_thread_state *state,
+ int fd,
+ enum lttng_domain_type *domain)
+{
+ struct notification_event_tracer_event_source_element *source_element;
+
+ assert(domain);
+
+ cds_list_for_each_entry(source_element,
+ &state->tracer_event_sources_list, node) {
+ if (source_element->fd != fd) {
+ continue;
+ }
+
+ *domain = source_element->domain;
+ return true;
+ }
+
+ return false;
+}
+
/*
* This thread services notification channel clients and commands received
* from various lttng-sessiond components over a command queue.
int ret;
struct notification_thread_handle *handle = data;
struct notification_thread_state state;
+ enum lttng_domain_type domain;
DBG("[notification-thread] Started notification thread");
- health_register(health_sessiond, HEALTH_SESSIOND_TYPE_NOTIFICATION);
+ health_register(the_health_sessiond, HEALTH_SESSIOND_TYPE_NOTIFICATION);
rcu_register_thread();
rcu_thread_online();
goto end;
}
+ if (testpoint(sessiond_thread_notification)) {
+ goto end;
+ }
+
while (true) {
int fd_count, i;
goto error;
}
+ /*
+ * Reset restart_poll flag so that calls below might turn it
+ * on.
+ */
+ state.restart_poll = false;
+
fd_count = ret;
for (i = 0; i < fd_count; i++) {
int fd = LTTNG_POLL_GETFD(&state.events, i);
if (ret) {
goto error;
}
+ } else if (fd_is_event_notification_source(&state, fd, &domain)) {
+ ret = handle_event_notification_pipe(fd, domain, revents, &state);
+ if (ret) {
+ goto error;
+ }
} else {
/* Activity on a client's socket. */
if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) {
}
}
}
+
+ /*
+ * Calls above might have changed the state of the
+ * FDs in `state.events`. Call _poll_wait() again to
+ * ensure we have a consistent state.
+ */
+ if (state.restart_poll) {
+ break;
+ }
}
}
exit:
end:
rcu_thread_offline();
rcu_unregister_thread();
- health_unregister(health_sessiond);
+ health_unregister(the_health_sessiond);
return NULL;
}
projects / lttng-tools.git / blobdiff