linux-kernel - Re: [PATCH] bonding: Inactive slaves should keep inactive flag's value to 1.

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Date:	Fri, 21 Mar 2014 14:34:23 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Zheng Li <zheng.x.li@...cle.com>, netdev@...r.kernel.org,
	fubar@...ibm.com, andy@...yhouse.net
CC:	linux-kernel@...r.kernel.org, davem@...emloft.net,
	joe.jin@...cle.com
Subject: Re: [PATCH] bonding: Inactive slaves should keep inactive flag's
 value to 1.

Hello.

On 03/20/2014 11:51 AM, Zheng Li wrote:

> Except bond mode 1, in other bond modes, inactive slaves should keep inactive flag to
> 1 to refuse to receive broadcast packets. Now, active slave send broadcast packets
> (for example ARP requests) which will arrive inactive slaves on same host from switch,
> but inactive slave's inactive flag is zero that cause bridge receive the broadcast
> packets to produce a wrong entry in forward table. Typical situation is domu send some
> ARP request which go out from dom0 bond's active slave, then the ARP broadcast request
> packets go back to inactive slave from switch, because the inactive slave's inactive
> flag is zero, kernel will receive the packets and pass them to bridge, that cause dom0's
> bridge map domu's MAC address to port of bond, bridge should map domu's MAC to port of vif.

> Signed-off-by: Zheng Li <zheng.x.li@...cle.com>
> ---
>   drivers/net/bonding/bond_main.c |    2 +-
>   1 files changed, 1 insertions(+), 1 deletions(-)

> diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
> index e5628fc..2f73f18 100644
> --- a/drivers/net/bonding/bond_main.c
> +++ b/drivers/net/bonding/bond_main.c
> @@ -3063,7 +3063,7 @@ static int bond_open(struct net_device *bond_dev)
>   				bond_set_slave_inactive_flags(slave,
>   							      BOND_SLAVE_NOTIFY_NOW);
>   			} else {
> -				bond_set_slave_active_flags(slave,
> +				bond_set_slave_state(slave, BOND_STATE_ACTIVE,
>   							    BOND_SLAVE_NOTIFY_NOW);

    Now you have to re-indent this line to start right under 'state'.

WBR, Sergei

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