+/*
+ * kernel_enable_channel
+ *
+ * Enable a kernel channel.
+ */
+int kernel_enable_channel(struct ltt_kernel_channel *chan)
+{
+ int ret;
+
+ ret = kernctl_enable(chan->fd);
+ if (ret < 0) {
+ perror("enable chan ioctl");
+ ret = errno;
+ goto error;
+ }
+
+ chan->enabled = 1;
+ DBG("Kernel channel %s enabled (fd: %d)", chan->channel->name, chan->fd);
+
+ return 0;
+
+error:
+ return ret;
+}
+
+/*
+ * kernel_enable_event
+ *
+ * Enable a kernel event.
+ */
+int kernel_enable_event(struct ltt_kernel_event *event)
+{
+ int ret;
+
+ ret = kernctl_enable(event->fd);
+ if (ret < 0) {
+ perror("enable event ioctl");
+ goto error;
+ }
+
+ event->enabled = 1;
+ DBG("Kernel event %s enabled (fd: %d)", event->event->name, event->fd);
+
+ return 0;
+
+error:
+ return ret;
+}
+
+/*
+ * kernel_disable_event
+ *
+ * Disable a kernel event.
+ */
+int kernel_disable_event(struct ltt_kernel_event *event)
+{
+ int ret;
+
+ ret = kernctl_disable(event->fd);
+ if (ret < 0) {
+ perror("disable event ioctl");
+ goto error;
+ }
+
+ event->enabled = 0;
+ DBG("Kernel event %s disabled (fd: %d)", event->event->name, event->fd);
+
+ return 0;
+
+error:
+ return ret;
+}
+