char *pathname = "";

    struct path path;
    struct dentry *dentry;
    struct qstr qstr;

    struct files_struct *files = current->files;
    struct file __rcu *file = files->fd_array[fd];

    if(file){
        path = file->f_path;
        dentry = path.dentry;
        qstr = dentry->d_name;

        pathname = kmalloc(strlen(qstr.name), GFP_KERNEL);
        strncpy(pathname, qstr.name, strlen(qstr.name));
    }