netdev - Re: [PATCH net-next 1/4] bonding: update the primary when slave name changed

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Message-ID: <20140109114636.GF5786@redhat.com>
Date:	Thu, 9 Jan 2014 12:46:36 +0100
From:	Veaceslav Falico <vfalico@...hat.com>
To:	Ding Tianhong <dingtianhong@...wei.com>
Cc:	Jay Vosburgh <fubar@...ibm.com>,
	"David S. Miller" <davem@...emloft.net>,
	Netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next 1/4] bonding: update the primary when slave name
 changed

On Thu, Jan 09, 2014 at 07:20:36PM +0800, Ding Tianhong wrote:
>If the primary_slave's name changed, but the bond->prams.primay was
>still using the old name, it is conflict with the meaning of the
>primary, so update the primary when the slave change its name.

Nope, the bonding parameter, which is set by the user, shouldn't change
because of an interface name change.

>
>Signed-off-by: Ding Tianhong <dingtianhong@...wei.com>
>---
> drivers/net/bonding/bond_main.c | 14 ++++++++++++--
> 1 file changed, 12 insertions(+), 2 deletions(-)
>
>diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
>index e06c445..de646e2 100644
>--- a/drivers/net/bonding/bond_main.c
>+++ b/drivers/net/bonding/bond_main.c
>@@ -2860,9 +2860,19 @@ static int bond_slave_netdev_event(unsigned long event,
> 		 */
> 		break;
> 	case NETDEV_CHANGENAME:
>-		/*
>-		 * TODO: handle changing the primary's name
>+		/* if the primary's name changed,
>+		 * save the new name for primary.
> 		 */
>+		if (USES_PRIMARY(bond->params.mode) &&
>+		    bond->params.primary[0]) {
>+			if (bond->primary_slave &&
>+			    strcmp(bond->params.primary,
>+				   bond->primary_slave->dev->name)) {
>+				strncpy(bond->params.primary,
>+					bond->primary_slave->dev->name,
>+					IFNAMSIZ);
>+			}
>+		}
> 		break;
> 	case NETDEV_FEAT_CHANGE:
> 		bond_compute_features(bond);
>-- 
>1.8.0
>
>
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