linux-kernel - Re: [PATCH v4 08/18] xen/pvcalls: implement connect command

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Date:   Wed, 21 Jun 2017 13:26:23 -0700 (PDT)
From:   Stefano Stabellini <sstabellini@...nel.org>
To:     Boris Ostrovsky <boris.ostrovsky@...cle.com>
cc:     Stefano Stabellini <sstabellini@...nel.org>,
        xen-devel@...ts.xen.org, linux-kernel@...r.kernel.org,
        jgross@...e.com, Stefano Stabellini <stefano@...reto.com>
Subject: Re: [PATCH v4 08/18] xen/pvcalls: implement connect command

On Tue, 20 Jun 2017, Boris Ostrovsky wrote:
> >> +
> >>  static int pvcalls_back_connect(struct xenbus_device *dev,
> >>  				struct xen_pvcalls_request *req)
> >>  {
> >> +	struct pvcalls_fedata *fedata;
> >> +	int ret = -EINVAL;
> >> +	struct socket *sock;
> >> +	struct sock_mapping *map;
> >> +	struct xen_pvcalls_response *rsp;
> >> +
> >> +	fedata = dev_get_drvdata(&dev->dev);
> >> +
> >> +	ret = sock_create(AF_INET, SOCK_STREAM, 0, &sock);
> >> +	if (ret < 0)
> >> +		goto out;
> >> +	ret = inet_stream_connect(sock, (struct sockaddr *)&req->u.connect.addr,
> >> +				  req->u.connect.len, req->u.connect.flags);
> >> +	if (ret < 0) {
> >> +		sock_release(sock);
> >> +		goto out;
> >> +	}
> >> +	
> >> +	map = pvcalls_new_active_socket(fedata,
> >> +					req->u.connect.id,
> >> +					req->u.connect.ref,
> >> +					req->u.connect.evtchn,
> >> +					sock);
> >> +	if (!map) {
> >> +		sock_release(map->sock);
> >> +		goto out;
> > Unnecessary goto.
> 
> Oh, and also ret needs to be set since it will be cleared by
> inet_stream_connect().

Right, thanks!

> >
> >> +	}
> >> +
> >> +out:
> >> +	rsp = RING_GET_RESPONSE(&fedata->ring, fedata->ring.rsp_prod_pvt++);
> >> +	rsp->req_id = req->req_id;
> >> +	rsp->cmd = req->cmd;
> >> +	rsp->u.connect.id = req->u.connect.id;
> >> +	rsp->ret = ret;
> >> +
> >> +	return ret;
> >
>