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bonding: fix enslavement error unwinds 

As part of:

commit c2edacf80e
Author: Jay Vosburgh <fubar@us.ibm.com>
Date:   Mon Jul 9 10:42:47 2007 -0700

    bonding / ipv6: no addrconf for slaves separately from master

two steps were rearranged in the enslavement process: netdev_set_master
is now before the call to dev_open to open the slave.

	This patch updates the error cases and unwind process at the
end of bond_enslave to match the new order.  Without this patch, it is
possible for the enslavement to fail, but leave the slave with IFF_SLAVE
set in its flags.

Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Jay Vosburgh 2008-05-02 18:06:02 -07:00 committed by Jeff Garzik
parent ae68c39819
commit 569f0c4d90
1 changed files with 7 additions and 7 deletions
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14
drivers/net/bonding/bond_main.c
View File

@ -1425,13 +1425,13 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
res = netdev_set_master(slave_dev, bond_dev);
if (res) {
dprintk("Error %d calling netdev_set_master\n", res);
goto err_close;
goto err_restore_mac;
}
/* open the slave since the application closed it */
res = dev_open(slave_dev);
if (res) {
dprintk("Openning slave %s failed\n", slave_dev->name);
goto err_restore_mac;
goto err_unset_master;
}
new_slave->dev = slave_dev;
@ -1444,7 +1444,7 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
*/
res = bond_alb_init_slave(bond, new_slave);
if (res) {
goto err_unset_master;
goto err_close;
}
}
@ -1619,7 +1619,7 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
res = bond_create_slave_symlinks(bond_dev, slave_dev);
if (res)
goto err_unset_master;
goto err_close;
printk(KERN_INFO DRV_NAME
": %s: enslaving %s as a%s interface with a%s link.\n",
@ -1631,12 +1631,12 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
return 0;
/* Undo stages on error */
err_unset_master:
netdev_set_master(slave_dev, NULL);
err_close:
dev_close(slave_dev);
err_unset_master:
netdev_set_master(slave_dev, NULL);
err_restore_mac:
if (!bond->params.fail_over_mac) {
memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN);