linux-kernel - Re: [PATCH] net: hsr: Disable promiscuous mode in offload mode

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Date:   Wed, 14 Jun 2023 11:42:43 +0200
From:   Paolo Abeni <pabeni@...hat.com>
To:     Ravi Gunasekaran <r-gunasekaran@...com>, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, bigeasy@...utronix.de
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        rogerq@...nel.org
Subject: Re: [PATCH] net: hsr: Disable promiscuous mode in offload mode

On Mon, 2023-06-12 at 15:09 +0530, Ravi Gunasekaran wrote:
> When port-to-port forwarding for interfaces in HSR node is enabled,
> disable promiscuous mode since L2 frame forward happens at the
> offloaded hardware.
> 
> Signed-off-by: Ravi Gunasekaran <r-gunasekaran@...com>
> ---
>  net/hsr/hsr_device.c |  5 +++++
>  net/hsr/hsr_main.h   |  1 +
>  net/hsr/hsr_slave.c  | 15 +++++++++++----
>  3 files changed, 17 insertions(+), 4 deletions(-)
> 
> diff --git a/net/hsr/hsr_device.c b/net/hsr/hsr_device.c
> index 5a236aae2366..306f942c3b28 100644
> --- a/net/hsr/hsr_device.c
> +++ b/net/hsr/hsr_device.c
> @@ -531,6 +531,11 @@ int hsr_dev_finalize(struct net_device *hsr_dev, struct net_device *slave[2],
>  	if (res)
>  		goto err_add_master;
>  
> +	/* HSR forwarding offload supported in lower device? */
> +	if ((slave[0]->features & NETIF_F_HW_HSR_FWD) &&
> +	    (slave[1]->features & NETIF_F_HW_HSR_FWD))
> +		hsr->fwd_offloaded = true;
> +
>  	res = register_netdevice(hsr_dev);
>  	if (res)
>  		goto err_unregister;
> diff --git a/net/hsr/hsr_main.h b/net/hsr/hsr_main.h
> index 5584c80a5c79..0225fabbe6d1 100644
> --- a/net/hsr/hsr_main.h
> +++ b/net/hsr/hsr_main.h
> @@ -195,6 +195,7 @@ struct hsr_priv {
>  	struct hsr_self_node	__rcu *self_node;	/* MACs of slaves */
>  	struct timer_list	announce_timer;	/* Supervision frame dispatch */
>  	struct timer_list	prune_timer;
> +	unsigned int            fwd_offloaded : 1; /* Forwarding offloaded to HW */

Please use plain 'bool' instead.

Also there is an hole in 'struct hsr_priv' just after 'net_id', you
could consider moving this new field there.


Thanks!

Paolo