Re: [Qemu-devel] [PATCH v2 2/9] net: use tcp_server_start() for tcp server creation

[Amos Kong <akong@xxxxxxxxxx>]

On 05/03/12 21:27, Orit Wasserman wrote:
> On 03/05/2012 12:03 PM, Amos Kong wrote:
> > Use tcp_server_start in those two functions:
> >   tcp_start_incoming_migration()
> >   net_socket_listen_init()
> >
> > Signed-off-by: Amos Kong<akong@xxxxxxxxxx>
> > ---
> >   migration-tcp.c |   21 +++++----------------
> >   net/socket.c    |   23 +++--------------------
> >   2 files changed, 8 insertions(+), 36 deletions(-)
> >
> > diff --git a/migration-tcp.c b/migration-tcp.c
> > index 35a5781..ecadd10 100644
> > --- a/migration-tcp.c
> > +++ b/migration-tcp.c
> > @@ -157,28 +157,17 @@ out2:
> >
> >   int tcp_start_incoming_migration(const char *host_port)
> >   {
> > -    struct sockaddr_in addr;
> > -    int val;
> > +    int ret;
> >       int s;
> >
> >       DPRINTF("Attempting to start an incoming migration\n");
> >
> > -    if (parse_host_port(&addr, host_port)<  0) {
> > -        fprintf(stderr, "invalid host/port combination: %s\n", host_port);
> > -        return -EINVAL;
> > -    }
> > -
> > -    s = qemu_socket(PF_INET, SOCK_STREAM, 0);
> > -    if (s == -1) {
> > -        return -socket_error();
> > +    ret = tcp_server_start(host_port,&s);
> > +    if (ret<  0) {
> > +        fprintf(stderr, "tcp_server_start: %s\n", strerror(-ret));
> > +        return ret;
> >       }
> >
> > -    val = 1;
> > -    setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
> > -
> > -    if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) == -1) {
> > -        goto err;
> > -    }
> >       if (listen(s, 1) == -1) {
> >           goto err;
> >       }
> > diff --git a/net/socket.c b/net/socket.c
> > index 0bcf229..5feb3d2 100644
> > --- a/net/socket.c
> > +++ b/net/socket.c
> > @@ -403,31 +403,14 @@ static int net_socket_listen_init(VLANState *vlan,
> >                                     const char *host_str)
> >   {
> >       NetSocketListenState *s;
> > -    int fd, val, ret;
> > -    struct sockaddr_in saddr;
> > -
> > -    if (parse_host_port(&saddr, host_str)<  0)
> > -        return -1;
> > +    int fd, ret;
> >
> >       s = g_malloc0(sizeof(NetSocketListenState));
> >
> > -    fd = qemu_socket(PF_INET, SOCK_STREAM, 0);
> > -    if (fd<  0) {
> > -        perror("socket");
> > -        g_free(s);
> > -        return -1;
> > -    }
> > -    socket_set_nonblock(fd);
> > -
> > -    /* allow fast reuse */
> > -    val = 1;
> > -    setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
> > -
> > -    ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
> > +    ret = tcp_server_start(host_str,&fd);
> >       if (ret<  0) {
> > -        perror("bind");
> > +        error_report("tcp_server_start: %s", strerror(-ret));
>
> If the return value is always -1 this has no meaning

Hi Orit,

"return -1;" is the original code, net_socket_listen_init() is only used 
once in net_init_socket()

        if (net_socket_connect_init(vlan, "socket", name, connect) == -1) {
            return -1;
        }

This patch just replace the server creation code by tcp_server_start().

Amos.
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