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bonding: Fix ALB mode to balance traffic on VLANs

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The current ALB function that processes incoming ARPs
does not handle traffic for VLANs configured above bonding.  This causes
traffic on those VLANs to all be assigned the same slave.  This patch
corrects that misbehavior by locating the bonding interface nested below
the VLAN interface.

	Bug reported by Sven Anders <anders@anduras.de>, who also
tested an earlier version of this patch and confirmed that it resolved
the problem.

Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Jay Vosburgh 2008-11-04 17:51:15 -08:00 committed by Jeff Garzik
parent 305d552acc
commit 6146b1a4da
1 changed files with 10 additions and 3 deletions
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13
drivers/net/bonding/bond_alb.c
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@ -346,14 +346,18 @@ static void rlb_update_entry_from_arp(struct bonding *bond, struct arp_pkt *arp)
static int rlb_arp_recv(struct sk_buff *skb, struct net_device *bond_dev, struct packet_type *ptype, struct net_device *orig_dev)
{
struct bonding *bond = bond_dev->priv;
struct bonding *bond;
struct arp_pkt *arp = (struct arp_pkt *)skb->data;
int res = NET_RX_DROP;
if (dev_net(bond_dev) != &init_net)
goto out;
if (!(bond_dev->flags & IFF_MASTER))
while (bond_dev->priv_flags & IFF_802_1Q_VLAN)
bond_dev = vlan_dev_real_dev(bond_dev);
if (!(bond_dev->priv_flags & IFF_BONDING) ||
!(bond_dev->flags & IFF_MASTER))
goto out;
if (!arp) {
@ -368,6 +372,9 @@ static int rlb_arp_recv(struct sk_buff *skb, struct net_device *bond_dev, struct
if (arp->op_code == htons(ARPOP_REPLY)) {
/* update rx hash table for this ARP */
printk("rar: update orig %s bond_dev %s\n", orig_dev->name,
bond_dev->name);
bond = bond_dev->priv;
rlb_update_entry_from_arp(bond, arp);
dprintk("Server received an ARP Reply from client\n");
}
@ -818,7 +825,7 @@ static int rlb_initialize(struct bonding *bond)
/*initialize packet type*/
pk_type->type = __constant_htons(ETH_P_ARP);
pk_type->dev = bond->dev;
pk_type->dev = NULL;
pk_type->func = rlb_arp_recv;
/* register to receive ARPs */