linux-kernel - Re: [PATCH v4 06/13] xen/pvcalls: implement bind command

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Date:   Thu, 21 Sep 2017 15:40:44 -0400
From:   Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:     Stefano Stabellini <sstabellini@...nel.org>,
        xen-devel@...ts.xen.org
Cc:     linux-kernel@...r.kernel.org, jgross@...e.com,
        Stefano Stabellini <stefano@...reto.com>
Subject: Re: [PATCH v4 06/13] xen/pvcalls: implement bind command



On 09/15/2017 07:00 PM, Stefano Stabellini wrote:
> Send PVCALLS_BIND to the backend. Introduce a new structure, part of
> struct sock_mapping, to store information specific to passive sockets.
> 
> Introduce a status field to keep track of the status of the passive
> socket.
> 
> Signed-off-by: Stefano Stabellini <stefano@...reto.com>
> CC: boris.ostrovsky@...cle.com
> CC: jgross@...e.com
> ---
>   drivers/xen/pvcalls-front.c | 68 +++++++++++++++++++++++++++++++++++++++++++++
>   drivers/xen/pvcalls-front.h |  3 ++
>   2 files changed, 71 insertions(+)
> 
> diff --git a/drivers/xen/pvcalls-front.c b/drivers/xen/pvcalls-front.c
> index ef511b6..50b6588 100644
> --- a/drivers/xen/pvcalls-front.c
> +++ b/drivers/xen/pvcalls-front.c
> @@ -72,6 +72,13 @@ struct sock_mapping {
>   
>   			wait_queue_head_t inflight_conn_req;
>   		} active;
> +		struct {
> +		/* Socket status */
> +#define PVCALLS_STATUS_UNINITALIZED  0
> +#define PVCALLS_STATUS_BIND          1
> +#define PVCALLS_STATUS_LISTEN        2
> +			uint8_t status;
> +		} passive;
>   	};
>   };
>   





> +	req->u.bind.id = (uint64_t) map;

Space between cast and variable (this happens in quite a few places)

> +	memcpy(req->u.bind.addr, addr, sizeof(*addr));
> +	req->u.bind.len = addr_len;
> +
> +	init_waitqueue_head(&map->passive.inflight_accept_req);

This queue is not introduced until patch 8.

-boris