• Moni Shoua's avatar
    IB/ipoib: Bound the net device to the ipoib_neigh structue · 732a2170
    Moni Shoua authored
    
    
    IPoIB uses a two layer neighboring scheme, such that for each struct neighbour
    whose device is an ipoib one, there is a struct ipoib_neigh buddy which is
    created on demand at the tx flow by an ipoib_neigh_alloc(skb->dst->neighbour)
    call.
    
    When using the bonding driver, neighbours are created by the net stack on behalf
    of the bonding (master) device. On the tx flow the bonding code gets an skb such
    that skb->dev points to the master device, it changes this skb to point on the
    slave device and calls the slave hard_start_xmit function.
    
    Under this scheme, ipoib_neigh_destructor assumption that for each struct
    neighbour it gets, n->dev is an ipoib device and hence netdev_priv(n->dev)
    can be casted to struct ipoib_dev_priv is buggy.
    
    To fix it, this patch adds a dev field to struct ipoib_neigh which is used
    instead of the struct neighbour dev one, when n->dev->flags has the
    IFF_MASTER bit set.
    
    Signed-off-by: Moni Shoua <monis at voltaire.com>
    Signed-off-by: Or Gerlitz <ogerlitz at voltaire.com>
    Acked-by: default avatarRoland Dreier <rdreier@cisco.com>
    Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
    732a2170