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 netif_drop_packets_enable(netif_info *pt_netif)
{
int ret = 0;
ret = netdev_rx_handler_register(pt_netif->ndev, drop_packet,
pt_netif);
if (ret) {
DBG_PRINT("Error %d calling netdev_rx_handler_register\n", ret);
goto out;
}
#ifdef CONFIG_NETPOLL
DBG_PRINT("==CONFIG_NETPOLL");
/* no effection for net_device on which netpoll have already been set up */
pt_netif->ndev->priv_flags |= IFF_DISABLE_NETPOLL;
smp_wmb();
if (rcu_dereference(pt_netif->ndev->npinfo))
{
/* netpoll already set up on this dev, rollback previous operations and return fail */
netif_drop_packets_disable(pt_netif);
ret = -EBUSY;
goto out;
}
#endif
DBG_PRINT("==");
out:
return ret;
}
static int rmnet_register_real_device(struct net_device *real_dev)
{
struct rmnet_port *port;
int rc;
ASSERT_RTNL();
if (rmnet_is_real_dev_registered(real_dev))
return 0;
port = kzalloc(sizeof(*port), GFP_ATOMIC);
if (!port)
return -ENOMEM;
port->dev = real_dev;
rc = netdev_rx_handler_register(real_dev, rmnet_rx_handler, port);
if (rc) {
kfree(port);
return -EBUSY;
}
/* hold on to real dev for MAP data */
dev_hold(real_dev);
netdev_dbg(real_dev, "registered with rmnet\n");
return 0;
}
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();
#ifdef HAVE_RHEL_OVS_HOOK
rcu_assign_pointer(netdev_vport->dev->ax25_ptr, vport);
atomic_inc(&nr_bridges);
rcu_assign_pointer(openvswitch_handle_frame_hook, netdev_frame_hook);
#else
err = netdev_rx_handler_register(netdev_vport->dev, netdev_frame_hook,
vport);
if (err)
goto error_unlock;
#endif
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();
return vport;
#ifndef HAVE_RHEL_OVS_HOOK
error_unlock:
#endif
rtnl_unlock();
error_put:
dev_put(netdev_vport->dev);
error_free_vport:
ovs_vport_free(vport);
error:
return ERR_PTR(err);
}
/* Setup device to be added to the HSR bridge. */
static int hsr_portdev_setup(struct net_device *dev, struct hsr_port *port)
{
int res;
dev_hold(dev);
res = dev_set_promiscuity(dev, 1);
if (res)
goto fail_promiscuity;
/* FIXME:
* What does net device "adjacency" mean? Should we do
* res = netdev_master_upper_dev_link(port->dev, port->hsr->dev); ?
*/
res = netdev_rx_handler_register(dev, hsr_handle_frame, port);
if (res)
goto fail_rx_handler;
dev_disable_lro(dev);
return 0;
fail_rx_handler:
dev_set_promiscuity(dev, -1);
fail_promiscuity:
dev_put(dev);
return res;
}
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;
}
/*
* 重要！通过相应的参数进行网络设备的注册
* 何时调用？
*/
static struct vport *netdev_create(const struct vport_parms *parms)
{
struct vport *vport;
struct netdev_vport *netdev_vport; // 看vport_netdev.h中的定义
int err;
//根据具体的ovs_netdev_vport_ops和参数构造一个vport
// 第一个参数代表私有数据的大小，这里正是要放struct netdev_vport
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;
}
/* 重要！就是设置net_device两个字段 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
*/
err = netdev_rx_handler_register(netdev_vport->dev, netdev_frame_hook, vport);
if (err)
goto error_put;
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;
return vport;
error_put:
dev_put(netdev_vport->dev);
error_free_vport:
ovs_vport_free(vport);
error:
return ERR_PTR(err);
}
static int netdev_attach(struct vport *vport)
{
struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
int err;
err = netdev_rx_handler_register(netdev_vport->dev, netdev_frame_hook,
vport);
if (err)
return err;
dev_set_promiscuity(netdev_vport->dev, 1);
dev_disable_lro(netdev_vport->dev);
netdev_vport->dev->priv_flags |= IFF_OVS_DATAPATH;
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);
}
/* 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 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(&init_net, 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;
}
err = netdev_rx_handler_register(netdev_vport->dev, netdev_frame_hook,
vport);
if (err)
goto error_put;
dev_set_promiscuity(netdev_vport->dev, 1);
netdev_vport->dev->priv_flags |= IFF_OVS_DATAPATH;
return vport;
error_put:
dev_put(netdev_vport->dev);
error_free_vport:
ovs_vport_free(vport);
error:
return ERR_PTR(err);
}
/**
* rmnet_associate_network_device() - Associate network device
* @dev: Device to register with RmNet data
*
* Typically used on physical network devices. Registers RX handler and private
* metadata structures.
*
* Return:
* - RMNET_CONFIG_OK if successful
* - RMNET_CONFIG_NO_SUCH_DEVICE dev is null
* - RMNET_CONFIG_INVALID_REQUEST if the device to be associated is a vnd
* - RMNET_CONFIG_DEVICE_IN_USE if dev rx_handler is already filled
* - RMNET_CONFIG_DEVICE_IN_USE if netdev_rx_handler_register() fails
*/
int rmnet_associate_network_device(struct net_device *dev)
{
struct rmnet_phys_ep_conf_s *config;
int rc;
ASSERT_RTNL();
LOGL("(%s);\n", dev->name);
if (!dev)
return RMNET_CONFIG_NO_SUCH_DEVICE;
if (_rmnet_is_physical_endpoint_associated(dev)) {
LOGM("%s is already regestered", dev->name);
return RMNET_CONFIG_DEVICE_IN_USE;
}
if (rmnet_vnd_is_vnd(dev)) {
LOGM("%s is a vnd", dev->name);
return RMNET_CONFIG_INVALID_REQUEST;
}
config = (struct rmnet_phys_ep_conf_s *)
kmalloc(sizeof(struct rmnet_phys_ep_conf_s), GFP_ATOMIC);
if (!config)
return RMNET_CONFIG_NOMEM;
memset(config, 0, sizeof(struct rmnet_phys_ep_conf_s));
config->dev = dev;
spin_lock_init(&config->agg_lock);
rc = netdev_rx_handler_register(dev, rmnet_rx_handler, config);
if (rc) {
LOGM("netdev_rx_handler_register returns %d", rc);
kfree(config);
return RMNET_CONFIG_DEVICE_IN_USE;
}
/* Explicitly hold a reference to the device */
dev_hold(dev);
trace_rmnet_associate(dev);
return RMNET_CONFIG_OK;
}
int __init init( void ) {
int err = 0;
struct priv *priv;
char ifstr[ 40 ];
sprintf( ifstr, "%s%s", ifname, "%d" );
#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 17, 0))
child = alloc_netdev( sizeof( struct priv ), ifstr, setup );
#else
child = alloc_netdev( sizeof( struct priv ), ifstr, NET_NAME_UNKNOWN, setup );
#endif
if( child == NULL ) {
ERR( "%s: allocate error", THIS_MODULE->name ); return -ENOMEM;
}
priv = netdev_priv( child );
priv->parent = __dev_get_by_name( &init_net, link ); // parent interface
if( !priv->parent ) {
ERR( "%s: no such net: %s", THIS_MODULE->name, link );
err = -ENODEV; goto err;
}
if( priv->parent->type != ARPHRD_ETHER && priv->parent->type != ARPHRD_LOOPBACK ) {
ERR( "%s: illegal net type", THIS_MODULE->name );
err = -EINVAL; goto err;
}
/* also, and clone its IP, MAC and other information */
memcpy( child->dev_addr, priv->parent->dev_addr, ETH_ALEN );
memcpy( child->broadcast, priv->parent->broadcast, ETH_ALEN );
if( ( err = dev_alloc_name( child, child->name ) ) ) {
ERR( "%s: allocate name, error %i", THIS_MODULE->name, err );
err = -EIO; goto err;
}
register_netdev( child );
rtnl_lock();
netdev_rx_handler_register( priv->parent, &handle_frame, NULL );
rtnl_unlock();
LOG( "module %s loaded", THIS_MODULE->name );
LOG( "%s: create link %s", THIS_MODULE->name, child->name );
LOG( "%s: registered rx handler for %s", THIS_MODULE->name, priv->parent->name );
return 0;
err:
free_netdev( child );
return err;
}
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 __init rh_init(void)
{
int rc = 0, err;
int i;
pr_info("rxhook (v%s) is loaded\n", RXHOOK_VERSION);
rh = kmalloc(sizeof(struct rh_dev), GFP_KERNEL);
if (rh == 0) {
pr_info("fail to kmalloc: *rh_dev\n");
rc = -1;
goto out;
}
rh->dev = dev_get_by_name(&init_net, ifname);
if (!rh->dev) {
pr_err("Could not find %s\n", ifname);
rc = -1;
goto out;
}
rh->cpu = smp_processor_id();
pr_info("cpuid: %d\n", rh->cpu);
// register
rtnl_lock();
err = netdev_rx_handler_register(rh->dev, rh_handle_frame, rh);
rtnl_unlock();
if (err) {
pr_err("%s failed to register rx_handler\n", ifname);
}
for(i = 0; i < 10; i++)
pps[i] = 0;
out:
return rc;
}
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_associate_network_device() - Associate network device
* @dev: Device to register with RmNet data
*
* Typically used on physical network devices. Registers RX handler and private
* metadata structures.
*
* Return:
* - RMNET_CONFIG_OK if successful
* - RMNET_CONFIG_NO_SUCH_DEVICE dev is null
* - RMNET_CONFIG_DEVICE_IN_USE if dev rx_handler is already filled
* - RMNET_CONFIG_DEVICE_IN_USE if netdev_rx_handler_register() fails
*/
int rmnet_associate_network_device(struct net_device *dev)
{
struct rmnet_phys_ep_conf_s *config;
int rc;
ASSERT_RTNL();
LOGL("%s(%s);", __func__, dev->name);
if (!dev)
return RMNET_CONFIG_NO_SUCH_DEVICE;
if (_rmnet_is_physical_endpoint_associated(dev)) {
LOGM("%s(): %s is already regestered\n", __func__, dev->name);
return RMNET_CONFIG_DEVICE_IN_USE;
}
config = (struct rmnet_phys_ep_conf_s *)
kmalloc(sizeof(struct rmnet_phys_ep_conf_s), GFP_ATOMIC);
if (!config)
return RMNET_CONFIG_NOMEM;
memset(config, 0, sizeof(struct rmnet_phys_ep_conf_s));
config->dev = dev;
spin_lock_init(&config->agg_lock);
rc = netdev_rx_handler_register(dev, rmnet_rx_handler, config);
if (rc) {
LOGM("%s(): netdev_rx_handler_register returns %d\n",
__func__, rc);
kfree(config);
return RMNET_CONFIG_DEVICE_IN_USE;
}
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;
}
struct netpoll_wrapper *netpoll_wrapper_create(const char *pDeviceName, int localPort, const char *pOptionalLocalIp)
{
struct net_device *pDevice;
struct netpoll_wrapper *pResult;
int localIp;
int err;
if (!pDeviceName || !localPort)
{
printk(KERN_ERR "kgdboe: cannot create a netpoll wrapper without a device name\n");
return NULL;
}
pDevice = dev_get_by_name(&init_net, pDeviceName);
if (!pDevice)
{
printk(KERN_ERR "kgdboe: Cannot find network device by name: %s\n", pDeviceName);
return NULL;
}
if (pOptionalLocalIp)
{
localIp = in_aton(pOptionalLocalIp);
if (!localIp)
{
printk(KERN_ERR "kgdboe: Invalid local IP: %s\n", pOptionalLocalIp);
return NULL;
}
}
else
{
if (!pDevice->ip_ptr)
{
printk(KERN_ERR "kgdboe: %s does not have an in_device associated. Cannot get default IP address.\n", pDeviceName);
return NULL;
}
if (!pDevice->ip_ptr->ifa_list)
{
printk(KERN_ERR "kgdboe: %s does not have a in_ifaddr struct associated. Cannot get default IP address.\n", pDeviceName);
return NULL;
}
localIp = pDevice->ip_ptr->ifa_list->ifa_local;
}
pResult = (struct netpoll_wrapper *)kmalloc(sizeof(struct netpoll_wrapper), GFP_KERNEL);
if (!pResult)
{
printk(KERN_ERR "kgdboe: cannot allocate memory for netpoll wrapper\n");
return NULL;
}
memset(pResult, 0, sizeof(*pResult));
#ifdef NETPOLL_POLL_DEV_USABLE
pResult->netpoll_poll_dev = (void(*)(struct net_device *))kallsyms_lookup_name("netpoll_poll_dev");
if (!pResult->netpoll_poll_dev)
{
printk(KERN_ERR "kgdboe: Cannot find netpoll_poll_dev(). Aborting.\n");
netpoll_wrapper_free(pResult);
return NULL;
}
#else
pResult->zap_completion_queue = (void(*)(void))kallsyms_lookup_name("zap_completion_queue");
if (!pResult->zap_completion_queue)
{
printk(KERN_ERR "kgdboe: Cannot find zap_completion_queue(). Aborting.\n");
netpoll_wrapper_free(pResult);
return NULL;
}
#endif
rtnl_lock();
err = netdev_rx_handler_register(pDevice, netpoll_wrapper_rx_handler, pResult);
rtnl_unlock();
if (err < 0)
{
printk(KERN_ERR "kgdboe: Failed to register rx handler for %s, code %d\n", pDeviceName, err);
netpoll_wrapper_free(pResult);
return NULL;
}
register_tracepoint_wrapper(netif_receive_skb, hook_receive_skb, pResult);
pResult->tracepoint_registered = true;
pResult->pDeviceWithHandler = pDevice;
strncpy(pResult->netpoll_obj.dev_name, pDeviceName, sizeof(pResult->netpoll_obj.dev_name));
pResult->netpoll_obj.name = "kgdboe";
pResult->netpoll_obj.local_port = localPort;
memset(pResult->netpoll_obj.remote_mac, 0xFF, sizeof(pResult->netpoll_obj.remote_mac));
err = netpoll_setup(&pResult->netpoll_obj);
if (err < 0)
{
printk(KERN_ERR "kgdboe: Failed to setup netpoll for %s, code %d\n", pDeviceName, err);
netpoll_wrapper_free(pResult);
return NULL;
}
pResult->netpoll_initialized = true;
return pResult;
}
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);
}