Re: [PATCH 3/3] net: socket: remove net_init_socket()

[David Gibson <dgibson@redhat.com>]

On Fri,  9 Jun 2023 09:27:48 +0200
Laurent Vivier <lvivier@redhat.com> wrote:

> Move the file descriptor type checking before doing anything with it.
> If it's not usable, don't close it as it could be in use by another
> part of QEMU, only fail and report an error.
> 
> Signed-off-by: Laurent Vivier <lvivier@redhat.com>

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>

> ---
>  net/socket.c | 43 +++++++++++++++++--------------------------
>  1 file changed, 17 insertions(+), 26 deletions(-)
> 
> diff --git a/net/socket.c b/net/socket.c
> index 6b1f0fec3a10..8e3702e1f3a8 100644
> --- a/net/socket.c
> +++ b/net/socket.c
> @@ -463,28 +463,6 @@ static int net_socket_fd_check(int fd, Error **errp)
>      return so_type;
>  }
>  
> -static NetSocketState *net_socket_fd_init(NetClientState *peer,
> -                                          const char *model, const char *name,
> -                                          int fd, int is_connected,
> -                                          const char *mc, Error **errp)
> -{
> -    int so_type;
> -
> -    so_type = net_socket_fd_check(fd, errp);
> -    if (so_type < 0) {
> -        close(fd);
> -        return NULL;
> -    }
> -    switch(so_type) {
> -    case SOCK_DGRAM:
> -        return net_socket_fd_init_dgram(peer, model, name, fd, is_connected,
> -                                        mc, errp);
> -    case SOCK_STREAM:
> -        return net_socket_fd_init_stream(peer, model, name, fd, is_connected);
> -    }
> -    return NULL;
> -}
> -
>  static void net_socket_accept(void *opaque)
>  {
>      NetSocketState *s = opaque;
> @@ -728,21 +706,34 @@ int net_init_socket(const Netdev *netdev, const char *name,
>      }
>  
>      if (sock->fd) {
> -        int fd, ret;
> +        int fd, ret, so_type;
>  
>          fd = monitor_fd_param(monitor_cur(), sock->fd, errp);
>          if (fd == -1) {
>              return -1;
>          }
> +        so_type = net_socket_fd_check(fd, errp);
> +        if (so_type < 0) {
> +            return -1;
> +        }
>          ret = qemu_socket_try_set_nonblock(fd);
>          if (ret < 0) {
>              error_setg_errno(errp, -ret, "%s: Can't use file descriptor %d",
>                               name, fd);
>              return -1;
>          }
> -        if (!net_socket_fd_init(peer, "socket", name, fd, 1, sock->mcast,
> -                                errp)) {
> -            return -1;
> +        switch (so_type) {
> +        case SOCK_DGRAM:
> +            if (!net_socket_fd_init_dgram(peer, "socket", name, fd, 1,
> +                                          sock->mcast, errp)) {
> +                return -1;
> +            }
> +            break;
> +        case SOCK_STREAM:
> +            if (!net_socket_fd_init_stream(peer, "socket", name, fd, 1)) {
> +                return -1;
> +            }
> +            break;
>          }
>          return 0;
>      }
> -- 
> 2.39.2
> 


-- 
David Gibson <dgibson@redhat.com>
Principal Software Engineer, Virtualization, Red Hat