C++ (Cpp) nbd_client_attach_aio_context Examples

Example #1

File: nbd-client.c Project: MollyZhang/esesc

void nbd_client_close(BlockDriverState *bs)
{
    NbdClientSession *client = nbd_get_client_session(bs);
    struct nbd_request request = {
        .type = NBD_CMD_DISC,
        .from = 0,
        .len = 0
    };

    if (client->sock == -1) {
        return;
    }

    nbd_send_request(client->sock, &request);

    nbd_teardown_connection(bs);
}

int nbd_client_init(BlockDriverState *bs, int sock, const char *export,
                    Error **errp)
{
    NbdClientSession *client = nbd_get_client_session(bs);
    int ret;

    /* NBD handshake */
    logout("session init %s\n", export);
    qemu_set_block(sock);
    ret = nbd_receive_negotiate(sock, export,
                                &client->nbdflags, &client->size,
                                &client->blocksize, errp);
    if (ret < 0) {
        logout("Failed to negotiate with the NBD server\n");
        closesocket(sock);
        return ret;
    }

    qemu_co_mutex_init(&client->send_mutex);
    qemu_co_mutex_init(&client->free_sema);
    client->sock = sock;

    /* Now that we're connected, set the socket to be non-blocking and
     * kick the reply mechanism.  */
    qemu_set_nonblock(sock);
    nbd_client_attach_aio_context(bs, bdrv_get_aio_context(bs));

    logout("Established connection with NBD server\n");
    return 0;
}

Example #2

File: nbd-client.c Project: 01org/qemu-lite

void nbd_client_close(BlockDriverState *bs)
{
    NbdClientSession *client = nbd_get_client_session(bs);
    struct nbd_request request = {
        .type = NBD_CMD_DISC,
        .from = 0,
        .len = 0
    };

    if (client->ioc == NULL) {
        return;
    }

    nbd_send_request(client->ioc, &request);

    nbd_teardown_connection(bs);
}

int nbd_client_init(BlockDriverState *bs,
                    QIOChannelSocket *sioc,
                    const char *export,
                    QCryptoTLSCreds *tlscreds,
                    const char *hostname,
                    Error **errp)
{
    NbdClientSession *client = nbd_get_client_session(bs);
    int ret;

    /* NBD handshake */
    logout("session init %s\n", export);
    qio_channel_set_blocking(QIO_CHANNEL(sioc), true, NULL);

    ret = nbd_receive_negotiate(QIO_CHANNEL(sioc), export,
                                &client->nbdflags,
                                tlscreds, hostname,
                                &client->ioc,
                                &client->size, errp);
    if (ret < 0) {
        logout("Failed to negotiate with the NBD server\n");
        return ret;
    }

    qemu_co_mutex_init(&client->send_mutex);
    qemu_co_mutex_init(&client->free_sema);
    client->sioc = sioc;
    object_ref(OBJECT(client->sioc));

    if (!client->ioc) {
        client->ioc = QIO_CHANNEL(sioc);
        object_ref(OBJECT(client->ioc));
    }

    /* Now that we're connected, set the socket to be non-blocking and
     * kick the reply mechanism.  */
    qio_channel_set_blocking(QIO_CHANNEL(sioc), false, NULL);

    nbd_client_attach_aio_context(bs, bdrv_get_aio_context(bs));

    logout("Established connection with NBD server\n");
    return 0;
}