Re: [Qemu-devel] [PATCH v2 4/9] net: use tcp_client_start for tcp client creation

[Orit Wasserman <owasserm@redhat.com>]

On 03/05/2012 12:03 PM, Amos Kong wrote:
> Use tcp_client_start() in those two functions:
>  tcp_start_outgoing_migration()
>  net_socket_connect_init()
> 
> Signed-off-by: Amos Kong <akong@redhat.com>
> ---
>  migration-tcp.c |   41 +++++++++++++----------------------------
>  net/socket.c    |   41 +++++++++++------------------------------
>  2 files changed, 24 insertions(+), 58 deletions(-)
> 
> diff --git a/migration-tcp.c b/migration-tcp.c
> index ecadd10..4f89bff 100644
> --- a/migration-tcp.c
> +++ b/migration-tcp.c
> @@ -81,43 +81,28 @@ static void tcp_wait_for_connect(void *opaque)
>  
>  int tcp_start_outgoing_migration(MigrationState *s, const char *host_port)
>  {
> -    struct sockaddr_in addr;
>      int ret;
> -
> -    ret = parse_host_port(&addr, host_port);
> -    if (ret < 0) {
> -        return ret;
> -    }
> +    int fd;
>  
>      s->get_error = socket_errno;
>      s->write = socket_write;
>      s->close = tcp_close;
>  
> -    s->fd = qemu_socket(PF_INET, SOCK_STREAM, 0);
> -    if (s->fd == -1) {
> -        DPRINTF("Unable to open socket");
> -        return -socket_error();
> -    }
> -
> -    socket_set_nonblock(s->fd);
> -
> -    do {
> -        ret = connect(s->fd, (struct sockaddr *)&addr, sizeof(addr));
> -        if (ret == -1) {
> -            ret = -socket_error();
> -        }
> -        if (ret == -EINPROGRESS || ret == -EWOULDBLOCK) {
> -            qemu_set_fd_handler2(s->fd, NULL, NULL, tcp_wait_for_connect, s);
> -            return 0;
> -        }
> -    } while (ret == -EINTR);
> -
> -    if (ret < 0) {
> +    ret = tcp_client_start(host_port, &fd);
> +    s->fd = fd;

you don't need fd you can pass s->fd to the function.

Orit

> +    if (ret == -EINPROGRESS || ret == -EWOULDBLOCK) {
> +        DPRINTF("connect in progress");
> +        qemu_set_fd_handler2(s->fd, NULL, NULL, tcp_wait_for_connect, s);
> +    } else if (ret < 0) {
>          DPRINTF("connect failed\n");
> -        migrate_fd_error(s);
> +        if (ret != -EINVAL) {
> +            migrate_fd_error(s);
> +        }
>          return ret;
> +    } else {
> +        migrate_fd_connect(s);
>      }
> -    migrate_fd_connect(s);
> +
>      return 0;
>  }
>  
> diff --git a/net/socket.c b/net/socket.c
> index 5feb3d2..b7cd8ec 100644
> --- a/net/socket.c
> +++ b/net/socket.c
> @@ -434,41 +434,22 @@ static int net_socket_connect_init(VLANState *vlan,
>                                     const char *host_str)
>  {
>      NetSocketState *s;
> -    int fd, connected, ret, err;
> +    int fd, connected, ret;
>      struct sockaddr_in saddr;
>  
> -    if (parse_host_port(&saddr, host_str) < 0)
> -        return -1;
> -
> -    fd = qemu_socket(PF_INET, SOCK_STREAM, 0);
> -    if (fd < 0) {
> -        perror("socket");
> -        return -1;
> -    }
> -    socket_set_nonblock(fd);
> -
> -    connected = 0;
> -    for(;;) {
> -        ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
> -        if (ret < 0) {
> -            err = socket_error();
> -            if (err == EINTR || err == EWOULDBLOCK) {
> -            } else if (err == EINPROGRESS) {
> -                break;
> +    ret = tcp_client_start(host_str, &fd);
> +    if (ret == -EINPROGRESS || ret == -EWOULDBLOCK) {
> +        connected = 0;
>  #ifdef _WIN32
> -            } else if (err == WSAEALREADY || err == WSAEINVAL) {
> -                break;
> +    } else if (ret == -WSAEALREADY || ret == -WSAEINVAL) {
> +        connected = 0;
>  #endif
> -            } else {
> -                perror("connect");
> -                closesocket(fd);
> -                return -1;
> -            }
> -        } else {
> -            connected = 1;
> -            break;
> -        }
> +    } else if (ret < 0) {
> +        return -1;
> +    } else {
> +        connected = 1;
>      }
> +
>      s = net_socket_fd_init(vlan, model, name, fd, connected);
>      if (!s)
>          return -1;
> 
>