static int do_vrf_add_slave(struct net_device *dev, struct net_device *port_dev)
{
int ret;
/* register the packet handler for slave ports */
ret = netdev_rx_handler_register(port_dev, vrf_handle_frame, dev);
if (ret) {
netdev_err(port_dev,
"Device %s failed to register rx_handler\n",
port_dev->name);
goto out_fail;
}
ret = netdev_master_upper_dev_link(port_dev, dev, NULL, NULL);
if (ret < 0)
goto out_unregister;
port_dev->priv_flags |= IFF_L3MDEV_SLAVE;
cycle_netdev(port_dev);
return 0;
out_unregister:
netdev_rx_handler_unregister(port_dev);
out_fail:
return ret;
}
static int do_vrf_add_slave(struct net_device *dev, struct net_device *port_dev,
struct netlink_ext_ack *extack)
{
int ret;
/* do not allow loopback device to be enslaved to a VRF.
* The vrf device acts as the loopback for the vrf.
*/
if (port_dev == dev_net(dev)->loopback_dev) {
NL_SET_ERR_MSG(extack,
"Can not enslave loopback device to a VRF");
return -EOPNOTSUPP;
}
port_dev->priv_flags |= IFF_L3MDEV_SLAVE;
ret = netdev_master_upper_dev_link(port_dev, dev, NULL, NULL, extack);
if (ret < 0)
goto err;
cycle_netdev(port_dev);
return 0;
err:
port_dev->priv_flags &= ~IFF_L3MDEV_SLAVE;
return ret;
}
static struct vport *netdev_create(const struct vport_parms *parms)
{
struct vport *vport;
struct netdev_vport *netdev_vport;
int err;
vport = ovs_vport_alloc(sizeof(struct netdev_vport),
&ovs_netdev_vport_ops, parms);
if (IS_ERR(vport)) {
err = PTR_ERR(vport);
goto error;
}
netdev_vport = netdev_vport_priv(vport);
netdev_vport->dev = dev_get_by_name(ovs_dp_get_net(vport->dp), parms->name);
if (!netdev_vport->dev) {
err = -ENODEV;
goto error_free_vport;
}
if (netdev_vport->dev->flags & IFF_LOOPBACK ||
netdev_vport->dev->type != ARPHRD_ETHER ||
ovs_is_internal_dev(netdev_vport->dev)) {
err = -EINVAL;
goto error_put;
}
rtnl_lock();
err = netdev_master_upper_dev_link(netdev_vport->dev,
get_dpdev(vport->dp));
if (err)
goto error_unlock;
err = netdev_rx_handler_register(netdev_vport->dev, netdev_frame_hook,
vport);
if (err)
goto error_master_upper_dev_unlink;
dev_set_promiscuity(netdev_vport->dev, 1);
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)
dev_disable_lro(netdev_vport->dev);
#endif
netdev_vport->dev->priv_flags |= IFF_OVS_DATAPATH;
rtnl_unlock();
netdev_init();
return vport;
error_master_upper_dev_unlink:
netdev_upper_dev_unlink(netdev_vport->dev, get_dpdev(vport->dp));
error_unlock:
rtnl_unlock();
error_put:
dev_put(netdev_vport->dev);
error_free_vport:
ovs_vport_free(vport);
error:
return ERR_PTR(err);
}
static int rmnet_newlink(struct net *src_net, struct net_device *dev,
struct nlattr *tb[], struct nlattr *data[],
struct netlink_ext_ack *extack)
{
int ingress_format = RMNET_INGRESS_FORMAT_DEMUXING |
RMNET_INGRESS_FORMAT_DEAGGREGATION |
RMNET_INGRESS_FORMAT_MAP;
int egress_format = RMNET_EGRESS_FORMAT_MUXING |
RMNET_EGRESS_FORMAT_MAP;
struct net_device *real_dev;
int mode = RMNET_EPMODE_VND;
struct rmnet_port *port;
int err = 0;
u16 mux_id;
real_dev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
if (!real_dev || !dev)
return -ENODEV;
if (!data[IFLA_VLAN_ID])
return -EINVAL;
mux_id = nla_get_u16(data[IFLA_VLAN_ID]);
err = rmnet_register_real_device(real_dev);
if (err)
goto err0;
port = rmnet_get_port_rtnl(real_dev);
err = rmnet_vnd_newlink(mux_id, dev, port, real_dev);
if (err)
goto err1;
err = netdev_master_upper_dev_link(dev, real_dev, NULL, NULL);
if (err)
goto err2;
netdev_dbg(dev, "data format [ingress 0x%08X] [egress 0x%08X]\n",
ingress_format, egress_format);
port->egress_data_format = egress_format;
port->ingress_data_format = ingress_format;
rmnet_set_endpoint_config(real_dev, mux_id, mode, dev);
rmnet_set_endpoint_config(dev, mux_id, mode, real_dev);
return 0;
err2:
rmnet_vnd_dellink(mux_id, port);
err1:
rmnet_unregister_real_device(real_dev, port);
err0:
return err;
}
static int do_vrf_add_slave(struct net_device *dev, struct net_device *port_dev)
{
int ret;
ret = netdev_master_upper_dev_link(port_dev, dev, NULL, NULL);
if (ret < 0)
return ret;
port_dev->priv_flags |= IFF_L3MDEV_SLAVE;
cycle_netdev(port_dev);
return 0;
}
struct vport *ovs_netdev_link(struct vport *vport, const char *name)
{
int err;
vport->dev = dev_get_by_name(ovs_dp_get_net(vport->dp), name);
if (!vport->dev) {
err = -ENODEV;
goto error_free_vport;
}
if (vport->dev->flags & IFF_LOOPBACK ||
(vport->dev->type != ARPHRD_ETHER &&
vport->dev->type != ARPHRD_NONE) ||
ovs_is_internal_dev(vport->dev)) {
err = -EINVAL;
goto error_put;
}
rtnl_lock();
err = netdev_master_upper_dev_link(vport->dev,
get_dpdev(vport->dp),
NULL, NULL, NULL);
if (err)
goto error_unlock;
err = netdev_rx_handler_register(vport->dev, netdev_frame_hook,
vport);
if (err)
goto error_master_upper_dev_unlink;
dev_disable_lro(vport->dev);
dev_set_promiscuity(vport->dev, 1);
vport->dev->priv_flags |= IFF_OVS_DATAPATH;
rtnl_unlock();
return vport;
error_master_upper_dev_unlink:
netdev_upper_dev_unlink(vport->dev, get_dpdev(vport->dp));
error_unlock:
rtnl_unlock();
error_put:
dev_put(vport->dev);
error_free_vport:
ovs_vport_free(vport);
return ERR_PTR(err);
}
static int do_vrf_add_slave(struct net_device *dev, struct net_device *port_dev)
{
struct slave *slave = kzalloc(sizeof(*slave), GFP_KERNEL);
struct net_vrf *vrf = netdev_priv(dev);
struct slave_queue *queue = &vrf->queue;
int ret = -ENOMEM;
if (!slave)
goto out_fail;
slave->dev = port_dev;
/* register the packet handler for slave ports */
ret = netdev_rx_handler_register(port_dev, vrf_handle_frame, dev);
if (ret) {
netdev_err(port_dev,
"Device %s failed to register rx_handler\n",
port_dev->name);
goto out_fail;
}
ret = netdev_master_upper_dev_link(port_dev, dev);
if (ret < 0)
goto out_unregister;
port_dev->priv_flags |= IFF_L3MDEV_SLAVE;
__vrf_insert_slave(queue, slave);
cycle_netdev(port_dev);
return 0;
out_unregister:
netdev_rx_handler_unregister(port_dev);
out_fail:
kfree(slave);
return ret;
}
static struct vport *netdev_create(const struct vport_parms *parms)
{
struct vport *vport;
struct netdev_vport *netdev_vport;
int err;
vport = ovs_vport_alloc(sizeof(struct netdev_vport),
&ovs_netdev_vport_ops, parms);
if (IS_ERR(vport)) {
err = PTR_ERR(vport);
goto error;
}
netdev_vport = netdev_vport_priv(vport);
//TODO:这里直接获取, 原因
netdev_vport->dev = dev_get_by_name(ovs_dp_get_net(vport->dp), parms->name);
if (!netdev_vport->dev) {
err = -ENODEV;
goto error_free_vport;
}
if (netdev_vport->dev->flags & IFF_LOOPBACK ||
netdev_vport->dev->type != ARPHRD_ETHER ||
ovs_is_internal_dev(netdev_vport->dev)) {
err = -EINVAL;
goto error_put;
}
rtnl_lock();
/**
* netdev_master_upper_dev_link - Add a master link to the upper device
* @dev: device
* @upper_dev: new upper device
*
* Adds a link to device which is upper to this one. In this case, only
* one master upper device can be linked, although other non-master devices
* might be linked as well. The caller must hold the RTNL lock.
* On a failure a negative errno code is returned. On success the reference
* counts are adjusted and the function returns zero.
*/
err = netdev_master_upper_dev_link(netdev_vport->dev,
get_dpdev(vport->dp));
if (err)
goto error_unlock;
/**
* netdev_rx_handler_register - register receive handler
* @dev: device to register a handler for
* @rx_handler: receive handler to register
* @rx_handler_data: data pointer that is used by rx handler
*
* Register a receive handler for a device. This handler will then be
* called from __netif_receive_skb. A negative errno code is returned
* on a failure.
*
* The caller must hold the rtnl_mutex.
*
* For a general description of rx_handler, see enum rx_handler_result.
*/
err = netdev_rx_handler_register(netdev_vport->dev, netdev_frame_hook,
vport);
if (err)
goto error_master_upper_dev_unlink;
dev_set_promiscuity(netdev_vport->dev, 1);
netdev_vport->dev->priv_flags |= IFF_OVS_DATAPATH;
rtnl_unlock();
return vport;
error_master_upper_dev_unlink:
netdev_upper_dev_unlink(netdev_vport->dev, get_dpdev(vport->dp));
error_unlock:
rtnl_unlock();
error_put:
dev_put(netdev_vport->dev);
error_free_vport:
ovs_vport_free(vport);
error:
return ERR_PTR(err);
}