netdev - Re: [patch net-next] bonding: allow to add vlans on top of empty bond

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Date:	Sat, 28 Jun 2014 09:49:08 +0200
From:	Jiri Pirko <jiri@...nulli.us>
To:	Veaceslav Falico <vfalico@...il.com>
Cc:	netdev@...r.kernel.org, davem@...emloft.net, j.vosburgh@...il.com,
	andy@...yhouse.net
Subject: Re: [patch net-next] bonding: allow to add vlans on top of empty bond

Sat, Jun 28, 2014 at 09:30:15AM CEST, vfalico@...il.com wrote:
>On Fri, Jun 27, 2014 at 04:13:12PM +0200, Jiri Pirko wrote:
>>This limitation maybe had some reason in the past, but now there is not
>>one -> removing this.
>
>Yeah, purely legacy stuff.
>
>>
>>Signed-off-by: Jiri Pirko <jiri@...nulli.us>
>
>For the patch:
>
>Acked-by: Veaceslav Falico <vfalico@...il.com>
>
>It would be also nice if you could have time to follow up with Jay's
>remarks :).

Allright. Will prepare follow-up as well.

>
>>---
>>drivers/net/bonding/bond_main.c | 13 -------------
>>1 file changed, 13 deletions(-)
>>
>>diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
>>index 3a451b6..ffefb70 100644
>>--- a/drivers/net/bonding/bond_main.c
>>+++ b/drivers/net/bonding/bond_main.c
>>@@ -1001,12 +1001,6 @@ static netdev_features_t bond_fix_features(struct net_device *dev,
>>	netdev_features_t mask;
>>	struct slave *slave;
>>
>>-	if (!bond_has_slaves(bond)) {
>>-		/* Disable adding VLANs to empty bond. But why? --mq */
>>-		features |= NETIF_F_VLAN_CHALLENGED;
>>-		return features;
>>-	}
>>-
>>	mask = features;
>>	features &= ~NETIF_F_ONE_FOR_ALL;
>>	features |= NETIF_F_ALL_FOR_ALL;
>>@@ -3956,13 +3950,6 @@ void bond_setup(struct net_device *bond_dev)
>>	bond_dev->priv_flags |= IFF_BONDING | IFF_UNICAST_FLT;
>>	bond_dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
>>
>>-	/* At first, we block adding VLANs. That's the only way to
>>-	 * prevent problems that occur when adding VLANs over an
>>-	 * empty bond. The block will be removed once non-challenged
>>-	 * slaves are enslaved.
>>-	 */
>>-	bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
>>-
>>	/* don't acquire bond device's netif_tx_lock when
>>	 * transmitting */
>>	bond_dev->features |= NETIF_F_LLTX;
>>-- 
>>1.9.0
>>
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