netdev - Re: [PATCH net-next v2 06/22] ovpn: introduce the ovpn

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Date: Fri, 8 Mar 2024 03:04:06 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Antonio Quartulli <antonio@...nvpn.net>
Cc: netdev@...r.kernel.org, Jakub Kicinski <kuba@...nel.org>,
	Sergey Ryazanov <ryazanov.s.a@...il.com>,
	Paolo Abeni <pabeni@...hat.com>, Eric Dumazet <edumazet@...gle.com>
Subject: Re: [PATCH net-next v2 06/22] ovpn: introduce the ovpn_peer object

> +static inline bool ovpn_peer_hold(struct ovpn_peer *peer)
> +{
> +	return kref_get_unless_zero(&peer->refcount);
> +}
> +
> +static inline void ovpn_peer_put(struct ovpn_peer *peer)
> +{
> +	kref_put(&peer->refcount, ovpn_peer_release_kref);
> +}

It is reasonably normal in the kernel to use _get() which takes a
reference on something and _put() to release it. 

> +struct ovpn_peer *ovpn_peer_lookup_transp_addr(struct ovpn_struct *ovpn, struct sk_buff *skb);
> +struct ovpn_peer *ovpn_peer_lookup_by_dst(struct ovpn_struct *ovpn, struct sk_buff *skb);
> +struct ovpn_peer *ovpn_peer_lookup_by_src(struct ovpn_struct *ovpn, struct sk_buff *skb);
> +struct ovpn_peer *ovpn_peer_lookup_id(struct ovpn_struct *ovpn, u32 peer_id);

All these look to take a reference on the peer. So maybe replace
lookup by get? It should then be easier to check there is a matching
put to every get.

	Andrew