netdev - Re: [PATCH net-next] rocker: check for BRIDGE_FLAGS

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Date:	Thu, 5 Mar 2015 09:36:21 +0100
From:	Jiri Pirko <jiri@...nulli.us>
To:	roopa@...ulusnetworks.com
Cc:	sfeldma@...il.com, netdev@...r.kernel.org, davem@...emloft.net
Subject: Re: [PATCH net-next] rocker: check for BRIDGE_FLAGS_SELF in bridge
 setlink handler

Wed, Mar 04, 2015 at 01:15:29AM CET, roopa@...ulusnetworks.com wrote:
>From: Roopa Prabhu <roopa@...ulusnetworks.com>
>
>With the recent addition of the NETIF_F_HW_SWITCH_OFFLOAD flag
>on rocker ports, the second command (bridge link set) below will turn off
>learning in the rocker hw (Scott/Jiri, need some confirmation from
>you that this is indeed a problem and if the below patch is ok).
>
>ip link set dev swp1 master br0
>bridge link set dev swp1 learning off master
>bridge link set dev swp1 learning_sync on self
>
>This patch fixes rocker to ignore learning setting when 'master'
>is set. This makes it possible to set/unset learning in kernel and bridge
>driver independently.
>
>The below command will continue to set learning on in both kernel and rocker
>hw:
>bridge link set dev swp1 learning on
>
>Signed-off-by: Roopa Prabhu <roopa@...ulusnetworks.com>
>---
> drivers/net/ethernet/rocker/rocker.c |    3 +++
> 1 file changed, 3 insertions(+)
>
>diff --git a/drivers/net/ethernet/rocker/rocker.c b/drivers/net/ethernet/rocker/rocker.c
>index e5a15a4..d7c31d2 100644
>--- a/drivers/net/ethernet/rocker/rocker.c
>+++ b/drivers/net/ethernet/rocker/rocker.c
>@@ -3769,6 +3769,9 @@ static int rocker_port_bridge_setlink(struct net_device *dev,
> 	struct nlattr *attr;
> 	int err;
> 
>+	if (flags && !(flags & BRIDGE_FLAGS_SELF))
>+		return 0;
>+

I think that the called should handle this case, not every particular
driver. How about to put this into rtnl_bridge_setlink?


> 	protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg),
> 				   IFLA_PROTINFO);
> 	if (protinfo) {
>-- 
>1.7.10.4
>
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