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[PATCH] bonding: Add priv_flag to avoid event mishandling

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Add priv_flag to specifically identify bonding-involved devices.  Needed
because IFF_MASTER is an unreliable identifier (vlan interfaces above bonding
will inherit IFF_MASTER).  Misidentification of devices would cause
notifier events for other devices to be erroneously processed by bonding,
causing various havoc.

Bug discovered by Martin Papik <martin.papik@ipsec.info>; this patch is
modified from his original.

Signed-off-by: Martin Papik <martin.papik@ipsec.info>
Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Jay Vosburgh 2006-09-22 21:54:10 -07:00 committed by Jeff Garzik
parent 54ef313714
commit 0b680e7537
2 changed files with 7 additions and 1 deletions
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7
drivers/net/bonding/bond_main.c
View file

@ -1371,6 +1371,7 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
}
new_slave->dev = slave_dev;
slave_dev->priv_flags |= IFF_BONDING;
if ((bond->params.mode == BOND_MODE_TLB) ||
(bond->params.mode == BOND_MODE_ALB)) {
@ -1784,7 +1785,7 @@ int bond_release(struct net_device *bond_dev, struct net_device *slave_dev)
dev_set_mac_address(slave_dev, &addr);
slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
IFF_SLAVE_INACTIVE);
IFF_SLAVE_INACTIVE | IFF_BONDING);
kfree(slave);
@ -3216,6 +3217,9 @@ static int bond_netdev_event(struct notifier_block *this, unsigned long event, v
(event_dev ? event_dev->name : "None"),
event);
if (!(event_dev->priv_flags & IFF_BONDING))
return NOTIFY_DONE;
if (event_dev->flags & IFF_MASTER) {
dprintk("IFF_MASTER\n");
return bond_master_netdev_event(event, event_dev);
@ -4185,6 +4189,7 @@ static int bond_init(struct net_device *bond_dev, struct bond_params *params)
/* Initialize the device options */
bond_dev->tx_queue_len = 0;
bond_dev->flags |= IFF_MASTER|IFF_MULTICAST;
bond_dev->priv_flags |= IFF_BONDING;
/* At first, we block adding VLANs. That's the only way to
* prevent problems that occur when adding VLANs over an

1
include/linux/if.h
View file

@ -59,6 +59,7 @@
#define IFF_SLAVE_INACTIVE 0x4 /* bonding slave not the curr. active */
#define IFF_MASTER_8023AD 0x8 /* bonding master, 802.3ad. */
#define IFF_MASTER_ALB 0x10 /* bonding master, balance-alb. */
#define IFF_BONDING 0x20 /* bonding master or slave */
#define IF_GET_IFACE 0x0001 /* for querying only */
#define IF_GET_PROTO 0x0002