netdev - Re: [PATCH RFC 2/7] bridge: cfm: Add BRIDGE

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Date:   Tue, 8 Sep 2020 12:18:31 +0000
From:   Nikolay Aleksandrov <nikolay@...dia.com>
To:     "bridge@...ts.linux-foundation.org" 
        <bridge@...ts.linux-foundation.org>,
        "henrik.bjoernlund@...rochip.com" <henrik.bjoernlund@...rochip.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "jiri@...lanox.com" <jiri@...lanox.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Roopa Prabhu <roopa@...dia.com>,
        "idosch@...lanox.com" <idosch@...lanox.com>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "UNGLinuxDriver@...rochip.com" <UNGLinuxDriver@...rochip.com>
CC:     "horatiu.vultur@...rochip.com" <horatiu.vultur@...rochip.com>
Subject: Re: [PATCH RFC 2/7] bridge: cfm: Add BRIDGE_CFM to Kconfig.

On Fri, 2020-09-04 at 09:15 +0000, Henrik Bjoernlund wrote:
> This makes it possible to include or exclude the CFM
> protocol according to 802.1Q section 12.14.
> 
> Signed-off-by: Henrik Bjoernlund  <henrik.bjoernlund@...rochip.com>
> ---
>  net/bridge/Kconfig      | 11 +++++++++++
>  net/bridge/br_device.c  |  3 +++
>  net/bridge/br_private.h |  3 +++
>  3 files changed, 17 insertions(+)
> 
> diff --git a/net/bridge/Kconfig b/net/bridge/Kconfig
> index 80879196560c..3c8ded7d3e84 100644
> --- a/net/bridge/Kconfig
> +++ b/net/bridge/Kconfig
> @@ -73,3 +73,14 @@ config BRIDGE_MRP
>  	  Say N to exclude this support and reduce the binary size.
>  
>  	  If unsure, say N.
> +
> +config BRIDGE_CFM
> +	bool "CFM protocol"
> +	depends on BRIDGE
> +	help
> +	  If you say Y here, then the Ethernet bridge will be able to run CFM
> +	  protocol according to 802.1Q section 12.14
> +
> +	  Say N to exclude this support and reduce the binary size.
> +
> +	  If unsure, say N.
> diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c
> index a9232db03108..d12f5626a4b1 100644
> --- a/net/bridge/br_device.c
> +++ b/net/bridge/br_device.c
> @@ -476,6 +476,9 @@ void br_dev_setup(struct net_device *dev)
>  	INIT_LIST_HEAD(&br->ftype_list);
>  #if IS_ENABLED(CONFIG_BRIDGE_MRP)
>  	INIT_LIST_HEAD(&br->mrp_list);
> +#endif
> +#if IS_ENABLED(CONFIG_BRIDGE_CFM)
> +	INIT_LIST_HEAD(&br->mep_list);
>  #endif
>  	spin_lock_init(&br->hash_lock);
>  
> diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
> index e67c6d9e8bea..6294a3e51a33 100644
> --- a/net/bridge/br_private.h
> +++ b/net/bridge/br_private.h
> @@ -445,6 +445,9 @@ struct net_bridge {
>  #if IS_ENABLED(CONFIG_BRIDGE_MRP)
>  	struct list_head		mrp_list;
>  #endif
> +#if IS_ENABLED(CONFIG_BRIDGE_CFM)
> +	struct list_head		mep_list;
> +#endif
>  };
>  
>  struct br_input_skb_cb {

Looks good, perhaps also can use hlist to reduce the head size in net_bridge.