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

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Date:	Mon, 31 Mar 2014 14:58:26 +0800
From:	"zheng.li" <zheng.x.li@...cle.com>
To:	fubar@...ibm.com
CC:	Zheng Li <zheng.x.li@...cle.com>, netdev@...r.kernel.org,
	andy@...yhouse.net, 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

Hi Jay,
What's you think about the new patch.

Thanks,
Zheng Li

于 2014年03月28日 17:22, Zheng Li 写道:
> In bond mode tlb and alb, 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..f97d72e 100644
> --- a/drivers/net/bonding/bond_main.c
> +++ b/drivers/net/bonding/bond_main.c
> @@ -3058,7 +3058,7 @@ static int bond_open(struct net_device *bond_dev)
>  	if (bond_has_slaves(bond)) {
>  		read_lock(&bond->curr_slave_lock);
>  		bond_for_each_slave(bond, slave, iter) {
> -			if ((bond->params.mode == BOND_MODE_ACTIVEBACKUP)
> +			if ((bond->params.mode == BOND_MODE_ACTIVEBACKUP || bond_is_lb(bond))
>  				&& (slave != bond->curr_active_slave)) {
>  				bond_set_slave_inactive_flags(slave,
>  							      BOND_SLAVE_NOTIFY_NOW);
> 


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