ret = kernctl_create_event(channel->fd, event->event);
if (ret < 0) {
- perror("create event ioctl");
+ PERROR("create event ioctl");
goto free_event;
}
+ /*
+ * LTTNG_KERNEL_SYSCALL event creation will return 0 on success. However
+ * this FD must not be added to the event list.
+ */
+ if (ret == 0 && event->event->instrumentation == LTTNG_KERNEL_SYSCALL) {
+ DBG2("Kernel event syscall creation success");
+ goto end;
+ }
+
event->fd = ret;
/* Prevent fd duplication after execlp() */
ret = fcntl(event->fd, F_SETFD, FD_CLOEXEC);
DBG("Event %s created (fd: %d)", ev->name, event->fd);
+end:
return 0;
free_event:
int ret;
ret = kernctl_enable(chan->fd);
- if (ret < 0) {
- perror("enable chan ioctl");
- ret = errno;
+ if (ret < 0 && errno != EEXIST) {
+ perror("Enable kernel chan");
goto error;
}
int ret;
ret = kernctl_enable(event->fd);
- if (ret < 0) {
- perror("enable event ioctl");
- if (errno == EEXIST) {
- ret = -EEXIST;
- }
+ if (ret < 0 && errno != EEXIST) {
+ perror("enable kernel event");
goto error;
}
int ret;
ret = kernctl_disable(event->fd);
- if (ret < 0) {
- perror("disable event ioctl");
+ if (ret < 0 && errno != EEXIST) {
+ perror("disable kernel event");
goto error;
}