[Ocfs2-devel] [PATCH 2/6] ocfs2: o2hb: add NEGO_TIMEOUT message

[Andrew Morton]

On Wed, 20 Jan 2016 11:13:35 +0800 Junxiao Bi <junxiao.bi at oracle.com> wrote:

> This message is sent to master node when non-master nodes's
> negotiate timer expired. Master node records these nodes in
> a bitmap which is used to do write timeout timer re-queue
> decision.
> 
> ...
>
> +static int o2hb_nego_timeout_handler(struct o2net_msg *msg, u32 len, void *data,
> +				void **ret_data)
> +{
> +	struct o2hb_region *reg = (struct o2hb_region *)data;

It's best not to typecast a void*.  It's unneeded clutter and the cast
can actually hide bugs - if someone changes `data' to a different type
or if there's a different "data" in scope, etc.

> +	struct o2hb_nego_msg *nego_msg;
>  
> +	nego_msg = (struct o2hb_nego_msg *)msg->buf;
> +	if (nego_msg->node_num < O2NM_MAX_NODES)
> +		set_bit(nego_msg->node_num, reg->hr_nego_node_bitmap);
> +	else
> +		mlog(ML_ERROR, "got nego timeout message from bad node.\n");
> +
> +	return 0;
>  }