Function fs_node_init_with_dentry 

pub fn fs_node_init_with_dentry(
    current_task: &CurrentTask,
    dir_entry: &DirEntryHandle,
) -> Result<(), Errno>

Called by the VFS to initialize the security state for an FsNode that is being linked at dir_entry. If the FsNode security state had already been initialized, or no policy is yet loaded, then this is a no-op. Corresponds to the d_instantiate() LSM hook.