netdev - Re: [PATCH net-next v5 06/25] ovpn: implement interface creation/destruction via netlink

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Date: Wed, 3 Jul 2024 23:27:04 +0200
From: Sabrina Dubroca <sd@...asysnail.net>
To: Antonio Quartulli <antonio@...nvpn.net>
Cc: netdev@...r.kernel.org, kuba@...nel.org, ryazanov.s.a@...il.com,
	pabeni@...hat.com, edumazet@...gle.com, andrew@...n.ch
Subject: Re: [PATCH net-next v5 06/25] ovpn: implement interface
 creation/destruction via netlink

2024-06-27, 15:08:24 +0200, Antonio Quartulli wrote:
>  int ovpn_nl_new_iface_doit(struct sk_buff *skb, struct genl_info *info)
>  {
[...]
> +	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
> +	if (!msg)
> +		return -ENOMEM;
> +
> +	hdr = genlmsg_iput(msg, info);
> +	if (!hdr) {
> +		nlmsg_free(msg);
> +		return -ENOBUFS;
> +	}
> +
> +	if (nla_put_string(msg, OVPN_A_IFNAME, dev->name)) {
> +		genlmsg_cancel(msg, hdr);
> +		nlmsg_free(msg);
> +		return -EMSGSIZE;
> +	}

Maybe the ifindex as well? The notifications in later patches use that
rather than the name, but I don't know how the client handles this reply.

> +	genlmsg_end(msg, hdr);
> +
> +	return genlmsg_reply(msg, info);
>  }

-- 
Sabrina