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authorShlomo Pongratz <shlomop@mellanox.com>2012-04-04 00:56:20 +0200
committerDavid S. Miller <davem@davemloft.net>2012-04-05 00:11:12 +0200
commit234bcf8a499ee206145c7007d12d9706a254f790 (patch)
tree2f42f68294a5b1c8093a631d81ed580fee0d0595 /drivers
parentnet/bonding: emit address change event also in bond_release (diff)
downloadlinux-234bcf8a499ee206145c7007d12d9706a254f790.tar.xz
linux-234bcf8a499ee206145c7007d12d9706a254f790.zip
net/bonding: correctly proxy slave neigh param setup ndo function
The current implemenation was buggy for slaves who use ndo_neigh_setup, since the networking stack invokes the bonding device ndo entry (from neigh_params_alloc) before any devices are enslaved, and the bonding driver can't further delegate the call at that point in time. As a result when bonding IPoIB devices, the neigh_cleanup hasn't been called. Fix that by deferring the actual call into the slave ndo_neigh_setup from the time the bonding neigh_setup is called. Signed-off-by: Shlomo Pongratz <shlomop@mellanox.com> Signed-off-by: Jay Vosburgh <fubar@us.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/bonding/bond_main.c51
1 files changed, 43 insertions, 8 deletions
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 5cb85cb0be4f..fc8a8d5c4dbd 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -3704,17 +3704,52 @@ static void bond_set_multicast_list(struct net_device *bond_dev)
read_unlock(&bond->lock);
}
-static int bond_neigh_setup(struct net_device *dev, struct neigh_parms *parms)
+static int bond_neigh_init(struct neighbour *n)
{
- struct bonding *bond = netdev_priv(dev);
+ struct bonding *bond = netdev_priv(n->dev);
struct slave *slave = bond->first_slave;
+ const struct net_device_ops *slave_ops;
+ struct neigh_parms parms;
+ int ret;
+
+ if (!slave)
+ return 0;
+
+ slave_ops = slave->dev->netdev_ops;
+
+ if (!slave_ops->ndo_neigh_setup)
+ return 0;
+
+ parms.neigh_setup = NULL;
+ parms.neigh_cleanup = NULL;
+ ret = slave_ops->ndo_neigh_setup(slave->dev, &parms);
+ if (ret)
+ return ret;
+
+ /*
+ * Assign slave's neigh_cleanup to neighbour in case cleanup is called
+ * after the last slave has been detached. Assumes that all slaves
+ * utilize the same neigh_cleanup (true at this writing as only user
+ * is ipoib).
+ */
+ n->parms->neigh_cleanup = parms.neigh_cleanup;
+
+ if (!parms.neigh_setup)
+ return 0;
+
+ return parms.neigh_setup(n);
+}
+
+/*
+ * The bonding ndo_neigh_setup is called at init time beofre any
+ * slave exists. So we must declare proxy setup function which will
+ * be used at run time to resolve the actual slave neigh param setup.
+ */
+static int bond_neigh_setup(struct net_device *dev,
+ struct neigh_parms *parms)
+{
+ parms->neigh_setup = bond_neigh_init;
- if (slave) {
- const struct net_device_ops *slave_ops
- = slave->dev->netdev_ops;
- if (slave_ops->ndo_neigh_setup)
- return slave_ops->ndo_neigh_setup(slave->dev, parms);
- }
return 0;
}