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;
}
/**
* rmnet_unassociate_network_device() - Unassociate network device
* @dev: Device to unassociate
*
* Frees all structures generate for device. Unregisters rx_handler
* todo: needs to do some sanity verification first (is device in use, etc...)
*
* Return:
* - RMNET_CONFIG_OK if successful
* - RMNET_CONFIG_NO_SUCH_DEVICE dev is null
* - RMNET_CONFIG_INVALID_REQUEST if device is not already associated
* - RMNET_CONFIG_UNKNOWN_ERROR net_device private section is null
*/
int rmnet_unassociate_network_device(struct net_device *dev)
{
struct rmnet_phys_ep_conf_s *config;
ASSERT_RTNL();
LOGL("%s(%s);", __func__, dev->name);
if (!dev)
return RMNET_CONFIG_NO_SUCH_DEVICE;
if (!_rmnet_is_physical_endpoint_associated(dev))
return RMNET_CONFIG_INVALID_REQUEST;
config = (struct rmnet_phys_ep_conf_s *)
rcu_dereference(dev->rx_handler_data);
if (!config)
return RMNET_CONFIG_UNKNOWN_ERROR;
kfree(config);
netdev_rx_handler_unregister(dev);
return RMNET_CONFIG_OK;
}
void hsr_del_port(struct hsr_port *port)
{
struct hsr_priv *hsr;
struct hsr_port *master;
hsr = port->hsr;
master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
list_del_rcu(&port->port_list);
if (port != master) {
if (master != NULL) {
netdev_update_features(master->dev);
dev_set_mtu(master->dev, hsr_get_max_mtu(hsr));
}
netdev_rx_handler_unregister(port->dev);
dev_set_promiscuity(port->dev, -1);
}
/* FIXME?
* netdev_upper_dev_unlink(port->dev, port->hsr->dev);
*/
synchronize_rcu();
if (port != master)
dev_put(port->dev);
}
static void macvtap_dellink(struct net_device *dev,
struct list_head *head)
{
struct macvtap_dev *vlantap = netdev_priv(dev);
netdev_rx_handler_unregister(dev);
tap_del_queues(&vlantap->tap);
macvlan_dellink(dev, head);
}
void ovs_netdev_detach_dev(struct vport *vport)
{
ASSERT_RTNL();
vport->dev->priv_flags &= ~IFF_OVS_DATAPATH;
netdev_rx_handler_unregister(vport->dev);
netdev_upper_dev_unlink(vport->dev,
netdev_master_upper_dev_get(vport->dev));
dev_set_promiscuity(vport->dev, -1);
}
static int netdev_detach(struct vport *vport)
{
struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
netdev_vport->dev->priv_flags &= ~IFF_OVS_DATAPATH;
netdev_rx_handler_unregister(netdev_vport->dev);
dev_set_promiscuity(netdev_vport->dev, -1);
return 0;
}
static void netdev_destroy(struct vport *vport)
{
struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
netdev_vport->dev->priv_flags &= ~IFF_OVS_DATAPATH;
netdev_rx_handler_unregister(netdev_vport->dev);
dev_set_promiscuity(netdev_vport->dev, -1);
call_rcu(&netdev_vport->rcu, free_port_rcu);
}
/* inverse of do_vrf_add_slave */
static int do_vrf_del_slave(struct net_device *dev, struct net_device *port_dev)
{
netdev_upper_dev_unlink(port_dev, dev);
port_dev->priv_flags &= ~IFF_L3MDEV_SLAVE;
netdev_rx_handler_unregister(port_dev);
cycle_netdev(port_dev);
return 0;
}
void __exit virt_exit( void ) {
struct priv *priv = netdev_priv( child );
if( priv->parent ) {
rtnl_lock();
netdev_rx_handler_unregister( priv->parent );
rtnl_unlock();
LOG( "unregister rx handler for %s\n", priv->parent->name );
}
unregister_netdev( child );
free_netdev( child );
LOG( "module %s unloaded", THIS_MODULE->name );
}
void
vhost_del_tap_phys(struct net_device *pdev)
{
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39))
if (rcu_dereference(pdev->rx_handler) == vhost_rx_handler)
netdev_rx_handler_unregister(pdev);
#else
vr_set_vif_ptr(pdev, NULL);
#endif
return;
}
static void netdev_destroy(struct vport *vport)
{
struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
netdev_vport->dev->priv_flags &= ~IFF_OVS_DATAPATH;
netdev_rx_handler_unregister(netdev_vport->dev);
dev_set_promiscuity(netdev_vport->dev, -1);
synchronize_rcu();
dev_put(netdev_vport->dev);
ovs_vport_free(vport);
}
static void netdev_destroy(struct vport *vport)
{
struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
netdev_exit();
rtnl_lock();
netdev_vport->dev->priv_flags &= ~IFF_OVS_DATAPATH;
netdev_rx_handler_unregister(netdev_vport->dev);
netdev_upper_dev_unlink(netdev_vport->dev, get_dpdev(vport->dp));
dev_set_promiscuity(netdev_vport->dev, -1);
rtnl_unlock();
call_rcu(&netdev_vport->rcu, free_port_rcu);
}
static int rmnet_unregister_real_device(struct net_device *real_dev,
struct rmnet_port *port)
{
if (port->nr_rmnet_devs)
return -EINVAL;
kfree(port);
netdev_rx_handler_unregister(real_dev);
/* release reference on real_dev */
dev_put(real_dev);
netdev_dbg(real_dev, "Removed from rmnet\n");
return 0;
}
void netpoll_wrapper_free(struct netpoll_wrapper *pWrapper)
{
if (pWrapper)
{
if (pWrapper->tracepoint_registered)
unregister_tracepoint_wrapper(netif_receive_skb, hook_receive_skb, pWrapper);
if (pWrapper->netpoll_initialized)
netpoll_cleanup(&pWrapper->netpoll_obj);
if (pWrapper->pDeviceWithHandler)
{
rtnl_lock();
netdev_rx_handler_unregister(pWrapper->pDeviceWithHandler);
rtnl_unlock();
}
kfree(pWrapper);
}
}
/* Ask the Linux RX subsystem to intercept (or stop intercepting)
* the packets incoming from the interface attached to 'na'.
*/
int
netmap_catch_rx(struct netmap_adapter *na, int intercept)
{
#ifndef NETMAP_LINUX_HAVE_RX_REGISTER
return 0;
#else /* HAVE_RX_REGISTER */
struct ifnet *ifp = na->ifp;
if (intercept) {
return -netdev_rx_handler_register(na->ifp,
&linux_generic_rx_handler, na);
} else {
netdev_rx_handler_unregister(ifp);
return 0;
}
#endif /* HAVE_RX_REGISTER */
}
static void netif_drop_packets_disable(netif_info *pt_netif)
{
struct net_device *ndev = (pt_netif->ndev);
if (!pt_netif->dsb_np_bit_orig)
{
pt_netif->ndev->priv_flags &= (~(IFF_DISABLE_NETPOLL));
smp_wmb();
}
netdev_rx_handler_unregister(ndev);
smp_wmb();
dev_put(pt_netif->ndev);
synchronize_rcu();
kfree(pt_netif);
DBG_PRINT("==");
}
/* inverse of do_vrf_add_slave */
static int do_vrf_del_slave(struct net_device *dev, struct net_device *port_dev)
{
struct net_vrf *vrf = netdev_priv(dev);
struct slave_queue *queue = &vrf->queue;
struct slave *slave;
netdev_upper_dev_unlink(port_dev, dev);
port_dev->priv_flags &= ~IFF_L3MDEV_SLAVE;
netdev_rx_handler_unregister(port_dev);
cycle_netdev(port_dev);
slave = __vrf_find_slave_dev(queue, port_dev);
if (slave)
__vrf_remove_slave(queue, slave);
kfree(slave);
return 0;
}
static void __exit rh_release(void)
{
unsigned int sum = 0;
int i;
pr_info("rxhook (v%s) is unloaded\n", RXHOOK_VERSION);
rtnl_lock();
netdev_rx_handler_unregister(rh->dev);
rtnl_unlock();
kfree(rh);
rh = NULL;
for(i = 0; i < 10; i++) {
pr_info("pps[%d] = %d\n", i, pps[i]);
sum += pps[i];
}
pr_info("sum: %u\n", sum);
return;
}
static int macvtap_newlink(struct net *src_net, struct net_device *dev,
struct nlattr *tb[], struct nlattr *data[],
struct netlink_ext_ack *extack)
{
struct macvtap_dev *vlantap = netdev_priv(dev);
int err;
INIT_LIST_HEAD(&vlantap->tap.queue_list);
/* Since macvlan supports all offloads by default, make
* tap support all offloads also.
*/
vlantap->tap.tap_features = TUN_OFFLOADS;
/* Register callbacks for rx/tx drops accounting and updating
* net_device features
*/
vlantap->tap.count_tx_dropped = macvtap_count_tx_dropped;
vlantap->tap.count_rx_dropped = macvtap_count_rx_dropped;
vlantap->tap.update_features = macvtap_update_features;
err = netdev_rx_handler_register(dev, tap_handle_frame, &vlantap->tap);
if (err)
return err;
/* Don't put anything that may fail after macvlan_common_newlink
* because we can't undo what it does.
*/
err = macvlan_common_newlink(src_net, dev, tb, data);
if (err) {
netdev_rx_handler_unregister(dev);
return err;
}
vlantap->tap.dev = vlantap->vlan.dev;
return 0;
}
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;
}
/**
* rmnet_unassociate_network_device() - Unassociate network device
* @dev: Device to unassociate
*
* Frees all structures generate for device. Unregisters rx_handler
* todo: needs to do some sanity verification first (is device in use, etc...)
*
* Return:
* - RMNET_CONFIG_OK if successful
* - RMNET_CONFIG_NO_SUCH_DEVICE dev is null
* - RMNET_CONFIG_INVALID_REQUEST if device is not already associated
* - RMNET_CONFIG_DEVICE_IN_USE if device has logical ep that wasn't unset
* - RMNET_CONFIG_UNKNOWN_ERROR net_device private section is null
*/
int rmnet_unassociate_network_device(struct net_device *dev)
{
struct rmnet_phys_ep_conf_s *config;
int config_id = RMNET_LOCAL_LOGICAL_ENDPOINT;
struct rmnet_logical_ep_conf_s *epconfig_l;
ASSERT_RTNL();
LOGL("(%s);", dev->name);
if (!dev)
return RMNET_CONFIG_NO_SUCH_DEVICE;
if (!_rmnet_is_physical_endpoint_associated(dev))
return RMNET_CONFIG_INVALID_REQUEST;
for (; config_id < RMNET_DATA_MAX_LOGICAL_EP; config_id++) {
epconfig_l = _rmnet_get_logical_ep(dev, config_id);
if (epconfig_l && epconfig_l->refcount)
return RMNET_CONFIG_DEVICE_IN_USE;
}
config = (struct rmnet_phys_ep_conf_s *)
rcu_dereference(dev->rx_handler_data);
if (!config)
return RMNET_CONFIG_UNKNOWN_ERROR;
kfree(config);
netdev_rx_handler_unregister(dev);
/* Explicitly release the reference from the device */
dev_put(dev);
trace_rmnet_unassociate(dev);
return RMNET_CONFIG_OK;
}
/*
* register an rx handler which will bypass all vrouter processing. Helpful
* at the time of vrouter soft reset. For kernels that does not support rx
* handler tap, the logic is handled in linux_rx_handler, albeit in an
* inefficient way (but works :)
*/
void
vhost_tap_phys(struct net_device *vdev, struct net_device *pdev)
{
struct vhost_priv *vp;
if (!vdev || !pdev)
return;
vp = netdev_priv(vdev);
/*
* with vhost_attach_phys, it is possible that everything was OK except
* that the physical went out and came back. if that is the case, do not
* tap here
*/
if (vp->vp_vifp)
goto exit_tap_phys;
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39))
/*
* it can so happen (unlikely) that vhost is deleted from vrouter
* before the physical, in which case we will have to unregister
* the rx handler in physical and install the vhost_rx_handler
*/
if (rcu_dereference(pdev->rx_handler) == linux_rx_handler)
netdev_rx_handler_unregister(pdev);
if (!rcu_dereference(pdev->rx_handler))
netdev_rx_handler_register(pdev, vhost_rx_handler, (void *)vdev);
#else
vr_set_vif_ptr(pdev, &vr_reset_interface);
#endif
exit_tap_phys:
return;
}
