* Create a kernel event, enable it to the kernel tracer and add it to the
* channel event list of the kernel session.
*/
-int kernel_create_event(struct ltt_kernel_channel *channel, struct lttng_event *ev)
+int kernel_create_event(struct lttng_event *ev, struct ltt_kernel_channel *channel)
{
int ret;
struct ltt_kernel_event *event;
ret = kernctl_create_event(channel->fd, event->event);
if (ret < 0) {
- ERR("Unable to enable event %s for channel %s", ev->name, channel->channel->name);
- goto error;
+ perror("create event ioctl");
+ goto free_event;
}
event->fd = ret;
/* Add event to event list */
cds_list_add(&event->list, &channel->events_list.head);
- DBG("Event %s enabled (fd: %d)", ev->name, event->fd);
+ DBG("Event %s created (fd: %d)", ev->name, event->fd);
return 0;
+free_event:
+ free(event);
error:
return -1;
}
+/*
+ * 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;
+}
+
/*
* kernel_open_metadata
*