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    Subject[RFC v2 4/4] xen-netback: skip IPv4 and IPv6 interfaces
    Date
    From: "Luis R. Rodriguez" <mcgrof@suse.com>

    The xen-netback driver is used only to provide a backend
    interface for the frontend. The link is the only thing we
    use, and that is used internally for letting us know when the
    xen-netfront is ready, when it switches to XenbusStateConnected.

    Note that only when the both the xen-netfront and xen-netback
    are both in state XenbusStateConnected will xen-netback allow
    userspace on the host (backend) to bring up the interface. Enabling
    and disabling the interface will simply enable or disable NAPI
    respectively, and that's used for IRQ communication set up with
    the xen event channels.

    Cc: Paul Durrant <Paul.Durrant@citrix.com>
    Cc: Ian Campbell <ian.campbell@citrix.com>
    Cc: Wei Liu <wei.liu2@citrix.com>
    Cc: xen-devel@lists.xenproject.org
    Cc: netdev@vger.kernel.org
    Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com>
    ---
    drivers/net/xen-netback/interface.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/drivers/net/xen-netback/interface.c b/drivers/net/xen-netback/interface.c
    index d380e3f..07e6fd2 100644
    --- a/drivers/net/xen-netback/interface.c
    +++ b/drivers/net/xen-netback/interface.c
    @@ -351,7 +351,7 @@ struct xenvif *xenvif_alloc(struct device *parent, domid_t domid,

    eth_hw_addr_random(dev);
    memcpy(dev->dev_addr, xen_oui, 3);
    - dev->priv_flags |= IFF_BRIDGE_NON_ROOT;
    + dev->priv_flags |= IFF_BRIDGE_NON_ROOT | IFF_SKIP_IP;
    netif_napi_add(dev, &vif->napi, xenvif_poll, XENVIF_NAPI_WEIGHT);

    netif_carrier_off(dev);
    --
    1.8.5.2


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