netdev - Re: [PATCH net-next V6 02/14] bridge: Add vlan filtering infrastructure

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Date:	Sun, 20 Jan 2013 23:38:51 +0200
From:	Shmulik Ladkani <shmulik.ladkani@...il.com>
To:	Vlad Yasevich <vyasevic@...hat.com>
Cc:	netdev@...r.kernel.org, bridge@...ts.linux-foundation.org,
	davem@...emloft.net, shemminger@...tta.com, mst@...hat.com
Subject: Re: [PATCH net-next V6 02/14] bridge: Add vlan filtering
 infrastructure

Hi Vlad,

On Wed, 16 Jan 2013 13:17:57 -0500 Vlad Yasevich <vyasevic@...hat.com> wrote:
> @@ -156,6 +183,7 @@ struct net_bridge_port
>  #ifdef CONFIG_NET_POLL_CONTROLLER
>  	struct netpoll			*np;
>  #endif
> +	struct net_port_vlans		vlan_info;

(here and at 'struct net_bridge' as well)

Not sure what the policy is; Isn't it preferred to enclose the new
fields under CONFIG_BRIDGE_VLAN_FILTERING?

> +static inline struct net_bridge *vlans_to_bridge(struct net_port_vlans *vlans)
> +{
> +	struct net_bridge *br;
> +
> +	if (!vlans->port_idx)
> +		br = container_of((vlans), struct net_bridge, vlan_info);
> +	else
> +		br = vlans_to_port(vlans)->br;
> +
> +	return br;
> +}

Guess it would simplify things if the bridge "master port" had an 'nbp'
representation of its own ;-)

> +extern struct net_bridge_vlan *br_vlan_find(struct net_bridge *br, u16 vid);

Seems 'br_vlan_find' can be declared static within br_vlan.c.

> +extern void br_vlan_flush(struct net_bridge *br);

According to your preference, consider s/br_vlan_flush/br_vlans_flush/
since it better suggest acting on all bridge's vlans.

> +extern void nbp_vlan_flush(struct net_port_vlans *vlans);

According to your preference, consider s/nbp_vlan_flush/nbp_vlans_flush/
since it better suggest acting on all port's vlans.

> +void br_vlan_flush(struct net_bridge *br)
> +{
> +	struct net_bridge_vlan *vlan;
> +	struct hlist_node *node;
> +	struct hlist_node *tmp;
> +	int i;
> +
> +	nbp_vlan_flush(&br->vlan_info);
> +
> +	/* Make sure that there are no vlans left in the bridge after
> +	* all the ports have been removed.
> +	*/

Improper indent.

> +	for (i = 0; i < BR_VID_HASH_SIZE; i++) {
> +		hlist_for_each_entry_safe(vlan, node, tmp,
> +					  &br->vlan_hlist[i], hlist) {
> +			br_vlan_del(vlan);

Can there be any vlans left at that point? Shouldn't del_nbp() on all
ports take care of that?
Also, if there _were_ any vlans left (whose bitmap isn't cleared),
'br_vlan_del' won't do a thing.
Am I missing something?

Regards,
Shmulik
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