X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fnotification-thread.cpp;h=7d9f4ed12dd72bae638db763f757ee8ffa7021a0;hb=319dcddc7409961e156af76666fe70d31baec55a;hp=e8a2adec9871eb07d68a37010bb479f8602a31c2;hpb=7966af5763c4aaca39df9bbfa9277ff15715c720;p=lttng-tools.git

diff --git a/src/bin/lttng-sessiond/notification-thread.cpp b/src/bin/lttng-sessiond/notification-thread.cpp
index e8a2adec9..7d9f4ed12 100644
--- a/src/bin/lttng-sessiond/notification-thread.cpp
+++ b/src/bin/lttng-sessiond/notification-thread.cpp
@@ -7,37 +7,43 @@
 
 #define _LGPL_SOURCE
 #include <lttng/trigger/trigger.h>
-#include <lttng/notification/channel-internal.h>
-#include <lttng/notification/notification-internal.h>
-#include <lttng/condition/condition-internal.h>
-#include <lttng/condition/buffer-usage-internal.h>
-#include <common/error.h>
-#include <common/config/session-config.h>
-#include <common/defaults.h>
-#include <common/utils.h>
-#include <common/align.h>
-#include <common/time.h>
+#include <lttng/notification/channel-internal.hpp>
+#include <lttng/notification/notification-internal.hpp>
+#include <lttng/condition/condition-internal.hpp>
+#include <lttng/condition/buffer-usage-internal.hpp>
+#include <common/error.hpp>
+#include <common/config/session-config.hpp>
+#include <common/defaults.hpp>
+#include <common/utils.hpp>
+#include <common/align.hpp>
+#include <common/time.hpp>
 #include <sys/stat.h>
+#include <sys/eventfd.h>
 #include <time.h>
 #include <signal.h>
 
-#include "notification-thread.h"
-#include "notification-thread-events.h"
-#include "notification-thread-commands.h"
-#include "lttng-sessiond.h"
-#include "health-sessiond.h"
-#include "thread.h"
-#include "testpoint.h"
+#include "notification-thread.hpp"
+#include "notification-thread-events.hpp"
+#include "notification-thread-commands.hpp"
+#include "lttng-sessiond.hpp"
+#include "health-sessiond.hpp"
+#include "thread.hpp"
+#include "testpoint.hpp"
 
-#include "kernel.h"
-#include <common/kernel-ctl/kernel-ctl.h>
+#include "kernel.hpp"
+#include <common/kernel-ctl/kernel-ctl.hpp>
 
 #include <urcu.h>
 #include <urcu/list.h>
 #include <urcu/rculfhash.h>
 
+/*
+ * Flag used to temporarily pause data consumption from testpoints.
+ *
+ * This variable is dlsym-ed from a test, so needs to be exported.
+ */
+LTTNG_EXPORT int notifier_consumption_paused;
 
-int notifier_consumption_paused;
 /*
  * Destroy the thread data previously created by the init function.
  */
@@ -54,8 +60,11 @@ void notification_thread_handle_destroy(
 	pthread_mutex_destroy(&handle->cmd_queue.lock);
 	sem_destroy(&handle->ready);
 
-	if (handle->cmd_queue.event_pipe) {
-		lttng_pipe_destroy(handle->cmd_queue.event_pipe);
+	if (handle->cmd_queue.event_fd >= 0) {
+		ret = close(handle->cmd_queue.event_fd);
+		if (ret < 0) {
+			PERROR("Failed to close notification command queue event fd");
+		}
 	}
 	if (handle->channel_monitoring_pipes.ust32_consumer >= 0) {
 		ret = close(handle->channel_monitoring_pipes.ust32_consumer);
@@ -87,23 +96,22 @@ struct notification_thread_handle *notification_thread_handle_create(
 {
 	int ret;
 	struct notification_thread_handle *handle;
-	struct lttng_pipe *event_pipe = NULL;
+	int event_fd = -1;
 
-	handle = (notification_thread_handle *) zmalloc(sizeof(*handle));
+	handle = zmalloc<notification_thread_handle>();
 	if (!handle) {
 		goto end;
 	}
 
 	sem_init(&handle->ready, 0, 0);
 
-	event_pipe = lttng_pipe_open(FD_CLOEXEC);
-	if (!event_pipe) {
-		ERR("event_pipe creation");
+	event_fd =  eventfd(0, EFD_CLOEXEC | EFD_SEMAPHORE);
+	if (event_fd < 0) {
+		PERROR("event_fd creation");
 		goto error;
 	}
 
-	handle->cmd_queue.event_pipe = event_pipe;
-	event_pipe = NULL;
+	handle->cmd_queue.event_fd = event_fd;
 
 	CDS_INIT_LIST_HEAD(&handle->cmd_queue.list);
 	ret = pthread_mutex_init(&handle->cmd_queue.lock, NULL);
@@ -145,7 +153,6 @@ struct notification_thread_handle *notification_thread_handle_create(
 end:
 	return handle;
 error:
-	lttng_pipe_destroy(event_pipe);
 	notification_thread_handle_destroy(handle);
 	return NULL;
 }
@@ -157,7 +164,7 @@ char *get_notification_channel_sock_path(void)
 	bool is_root = !getuid();
 	char *sock_path;
 
-	sock_path = (char *) zmalloc(LTTNG_PATH_MAX);
+	sock_path = calloc<char>(LTTNG_PATH_MAX);
 	if (!sock_path) {
 		goto error;
 	}
@@ -291,7 +298,7 @@ int init_poll_set(struct lttng_poll_event *poll_set,
 		ERR("Failed to add notification channel socket to pollset");
 		goto error;
 	}
-	ret = lttng_poll_add(poll_set, lttng_pipe_get_readfd(handle->cmd_queue.event_pipe),
+	ret = lttng_poll_add(poll_set, handle->cmd_queue.event_fd,
 			LPOLLIN | LPOLLERR);
 	if (ret < 0) {
 		ERR("Failed to add notification command queue event fd to pollset");
@@ -706,7 +713,7 @@ void *thread_notification(void *data)
 					ERR("Unexpected poll events %u for notification socket %i", revents, fd);
 					goto error;
 				}
-			} else if (fd == lttng_pipe_get_readfd(handle->cmd_queue.event_pipe)) {
+			} else if (fd == handle->cmd_queue.event_fd) {
 				ret = handle_notification_thread_command(handle,
 						&state);
 				if (ret < 0) {