Merge "[rpc_binder] Use unique_fd directly for socket in raw socket setup"

status_t RpcServer::setupRawSocketServer(unique_fd socket_fd) {

    LOG_ALWAYS_FATAL_IF(!socket_fd.ok(), "Socket must be setup to listen.");

    RpcTransportFd transportFd(std::move(socket_fd));

    // Right now, we create all threads at once, making accept4 slow. To avoid hanging the client,

    // the backlog is increased to a large number.

    // TODO(b/189955605): Once we create threads dynamically & lazily, the backlog can be reduced

    //  to 1.

    if (0 != TEMP_FAILURE_RETRY(listen(transportFd.fd.get(), 50 /*backlog*/))) {

    if (0 != TEMP_FAILURE_RETRY(listen(socket_fd.get(), 50 /*backlog*/))) {

        int savedErrno = errno;

        ALOGE("Could not listen initialized Unix socket: %s", strerror(savedErrno));

        return -savedErrno;

    }

    if (status_t status = setupExternalServer(std::move(transportFd.fd)); status != OK) {

    if (status_t status = setupExternalServer(std::move(socket_fd)); status != OK) {

        ALOGE("Another thread has set up server while calling setupSocketServer. Race?");

        return status;

    }