linux-kernel - Re: [RFC 1/1] net: introduce OpenVPN Data Channel Offload (ovpn-dco)

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Date:   Tue, 19 Jul 2022 17:19:07 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Antonio Quartulli <antonio@...nvpn.net>
Cc:     netdev@...r.kernel.org, David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [RFC 1/1] net: introduce OpenVPN Data Channel Offload (ovpn-dco)

> +void ovpn_crypto_key_slot_delete(struct ovpn_crypto_state *cs,
> +				 enum ovpn_key_slot slot)
> +{
> +	struct ovpn_crypto_key_slot *ks = NULL;
> +
> +	mutex_lock(&cs->mutex);
> +	switch (slot) {
> +	case OVPN_KEY_SLOT_PRIMARY:
> +		ks = rcu_replace_pointer(cs->primary, NULL,
> +					 lockdep_is_held(&cs->mutex));
> +		break;
> +	case OVPN_KEY_SLOT_SECONDARY:
> +		ks = rcu_replace_pointer(cs->secondary, NULL,
> +					 lockdep_is_held(&cs->mutex));
> +		break;
> +	default:
> +		pr_warn("Invalid slot to release: %u\n", slot);
> +		break;
> +	}
> +	mutex_unlock(&cs->mutex);
> +
> +	if (!ks) {
> +		pr_debug("Key slot already released: %u\n", slot);
> +		return;
> +	}
> +	pr_debug("deleting key slot %u, key_id=%u\n", slot, ks->key_id);

As a general comment throughout the code, pr_ functions are not
liked. Since this is a network device, it would be better to use
netdev_debug(), netdev_warn() etc, so indicating which device is
outputting warnings or debug info.

	   Andrew