Unlink files within a linux kernel module

int unlink_file(const char * req_path)
{
    int length;
    char file_path[256];
    char file_dir[256];
    struct file * target;
    struct file * path;
    struct inode *delegated_inode;
    int i;

    length = strlen(req_path);

    memcpy(file_path, req_path, length  + 1);
    memcpy(file_dir, req_path, length  + 1);

    target = filp_open(file_path, O_RDONLY, 0600);

    if (!target)
        return 0; /* file not found */

    for (i = length; i > 0; i--)
    {
        if (file_dir[i] == '/')
        {
            *(char **)(&(file_dir[i + 1])) = (char *)0x00;
            break;
        }
    }

    if (!i) return -1; /* dir err */

    path   = filp_open(file_dir, O_RDONLY, 0600);

    if (!path) return -2;

    vfs_unlink(path->f_path.dentry->d_inode, target->f_path.dentry, &delegated_inode); //TODO: check response

    return 1;
}