/* 16 SIOCSIFFLAGS -- Set flags of a network interface.  */
kern_return_t
S_iioctl_siocsifflags (io_t port,
		       ifname_t ifnam,
		       short flags)
{
  struct sock_user *user = begin_using_socket_port (port);
  error_t err = 0;
  struct device *dev;

  if (!user)
    return EOPNOTSUPP;

  dev = get_dev (ifnam);

  if (!user->isroot)
    err = EPERM;
  else if (!dev)
    err = ENODEV;
  else
    {
      err = dev_change_flags (dev, flags);
      if (!err)
        err = ethernet_change_flags (dev, flags);
    }

  __mutex_unlock (&global_lock);
  end_using_socket_port (user);
  return err;
}

static struct vport *gre_tnl_create(const struct vport_parms *parms)
{
	struct net *net = ovs_dp_get_net(parms->dp);
	struct net_device *dev;
	struct vport *vport;
	int err;

	vport = ovs_vport_alloc(0, &ovs_gre_vport_ops, parms);
	if (IS_ERR(vport))
		return vport;

	rtnl_lock();
	dev = gretap_fb_dev_create(net, parms->name, NET_NAME_USER);
	if (IS_ERR(dev)) {
		rtnl_unlock();
		ovs_vport_free(vport);
		return ERR_CAST(dev);
	}

	err = dev_change_flags(dev, dev->flags | IFF_UP);
	if (err < 0) {
		rtnl_delete_link(dev);
		rtnl_unlock();
		ovs_vport_free(vport);
		return ERR_PTR(err);
	}

	rtnl_unlock();
	return vport;
}

/* cycle interface to flush neighbor cache and move routes across tables */
static void cycle_netdev(struct net_device *dev)
{
	unsigned int flags = dev->flags;
	int ret;

	if (!netif_running(dev))
		return;

	ret = dev_change_flags(dev, flags & ~IFF_UP);
	if (ret >= 0)
		ret = dev_change_flags(dev, flags);

	if (ret < 0) {
		netdev_err(dev,
			   "Failed to cycle device %s; route tables might be wrong!\n",
			   dev->name);
	}
}

static int ipoib_set_ring_param(struct net_device *dev,
				struct ethtool_ringparam *ringparam)
{
	struct ipoib_dev_priv *priv = netdev_priv(dev);
	unsigned int new_recvq_size, new_sendq_size;
	unsigned long priv_current_flags;
	unsigned int dev_current_flags;
	bool init = false;

	if (ringparam->rx_pending <= IPOIB_MAX_QUEUE_SIZE &&
	    ringparam->rx_pending >= IPOIB_MIN_QUEUE_SIZE) {
		new_recvq_size = roundup_pow_of_two(ringparam->rx_pending);
		if (ringparam->rx_pending != new_recvq_size)
			pr_warn("%s: %s: rx_pending should be power of two. rx_pending is %d\n",
				dev->name, __func__, new_recvq_size);
	} else {
		pr_err(KERN_ERR "rx_pending (%d) is out of bounds [%d-%d]\n",
		       ringparam->rx_pending,
		       IPOIB_MIN_QUEUE_SIZE, IPOIB_MAX_QUEUE_SIZE);
		return -EINVAL;
	}

	if (ringparam->tx_pending <= IPOIB_MAX_QUEUE_SIZE &&
	    ringparam->tx_pending >= IPOIB_MIN_QUEUE_SIZE) {
		new_sendq_size = roundup_pow_of_two(ringparam->tx_pending);
		if (ringparam->tx_pending != new_sendq_size)
			pr_warn("%s: %s: tx_pending should be power of two. tx_pending is %d\n",
				dev->name, __func__, new_sendq_size);
	} else {
		pr_err(KERN_ERR "tx_pending (%d) is out of bounds [%d-%d]\n",
		       ringparam->tx_pending,
		       IPOIB_MIN_QUEUE_SIZE, IPOIB_MAX_QUEUE_SIZE);
		return -EINVAL;
	}

	if ((new_recvq_size != priv->recvq_size) ||
	    (new_sendq_size != priv->sendq_size)) {
		priv_current_flags = priv->flags;
		dev_current_flags = dev->flags;

		dev_change_flags(dev, dev->flags & ~IFF_UP);
		ipoib_dev_uninit(dev);

		do {
			priv->recvq_size = new_recvq_size;
			priv->sendq_size = new_sendq_size;
			if (ipoib_ethtool_dev_init(dev)) {
				new_recvq_size >>= 1;
				new_sendq_size >>= 1;
				/* keep the values always legal */
				new_recvq_size = max_t(unsigned int, new_recvq_size, IPOIB_MIN_QUEUE_SIZE);
				new_sendq_size = max_t(unsigned int, new_sendq_size, IPOIB_MIN_QUEUE_SIZE);
			} else {
				init = true;
			}
		} while (!init &&

static io_return_t
device_set_status(void *d, dev_flavor_t flavor, dev_status_t status,
		  mach_msg_type_number_t count)
{
  if (flavor == NET_FLAGS)
    {
      if (count != 1)
        return D_INVALID_SIZE;

      short flags = status[0];
      struct net_data *net = (struct net_data *) d;

      dev_change_flags (net->dev, flags);

      /* Change the flags of the Mach device, too. */
      net->ifnet.if_flags = net->dev->flags;
      return D_SUCCESS;
    }

  if(flavor < SIOCIWFIRST || flavor > SIOCIWLAST)
    return D_INVALID_OPERATION;

  if(! IW_IS_SET(flavor))
    return D_INVALID_OPERATION;
  
  if(count * sizeof(int) < sizeof(struct ifreq))
    return D_INVALID_OPERATION;

  struct net_data *nd = d;
  struct linux_device *dev = nd->dev;

  if(! dev->do_ioctl)
    return D_INVALID_OPERATION;

  if((flavor == SIOCSIWENCODE || flavor == SIOCSIWESSID
      || flavor == SIOCSIWNICKN || flavor == SIOCSIWSPY)
     && ((struct iwreq *) status)->u.data.pointer)
    {
      struct iw_point *iwp = &((struct iwreq *) status)->u.data;

      /* safety check whether the status array is long enough ... */
      if(count * sizeof(int) < sizeof(struct ifreq) + iwp->length)
	return D_INVALID_OPERATION;

      /* make sure, iwp->pointer points to the correct address */
      if(iwp->pointer) iwp->pointer = (void *) status + sizeof(struct ifreq);
    }
  
  int result = dev->do_ioctl(dev, (struct ifreq *) status, flavor);
  return result ? D_IO_ERROR : D_SUCCESS;
}

static struct vport *geneve_tnl_create(const struct vport_parms *parms)
{
	struct net *net = ovs_dp_get_net(parms->dp);
	struct nlattr *options = parms->options;
	struct geneve_port *geneve_port;
	struct net_device *dev;
	struct vport *vport;
	struct nlattr *a;
	u16 dst_port;
	int err;

	if (!options) {
		err = -EINVAL;
		goto error;
	}

	a = nla_find_nested(options, OVS_TUNNEL_ATTR_DST_PORT);
	if (a && nla_len(a) == sizeof(u16)) {
		dst_port = nla_get_u16(a);
	} else {
		/* Require destination port from userspace. */
		err = -EINVAL;
		goto error;
	}

	vport = ovs_vport_alloc(sizeof(struct geneve_port),
				&ovs_geneve_vport_ops, parms);
	if (IS_ERR(vport))
		return vport;

	geneve_port = geneve_vport(vport);
	geneve_port->dst_port = dst_port;

	rtnl_lock();
	dev = geneve_dev_create_fb(net, parms->name, NET_NAME_USER, dst_port);
	if (IS_ERR(dev)) {
		rtnl_unlock();
		ovs_vport_free(vport);
		return ERR_CAST(dev);
	}

	dev_change_flags(dev, dev->flags | IFF_UP);
	rtnl_unlock();
	return vport;
error:
	return ERR_PTR(err);
}

int vlan_dev_set_mac_address(struct net_device *dev, void *addr_struct_p)
{
	struct sockaddr *addr = (struct sockaddr *)(addr_struct_p);
	int i;

	if (netif_running(dev))
		return -EBUSY;

	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);

	printk("%s: Setting MAC address to ", dev->name);
	for (i = 0; i < 6; i++)
		printk(" %2.2x", dev->dev_addr[i]);
	printk(".\n");

	if (memcmp(VLAN_DEV_INFO(dev)->real_dev->dev_addr,
		   dev->dev_addr,
		   dev->addr_len) != 0) {
		if (!(VLAN_DEV_INFO(dev)->real_dev->flags & IFF_PROMISC)) {
			int flgs = VLAN_DEV_INFO(dev)->real_dev->flags;

			/* Increment our in-use promiscuity counter */
			dev_set_promiscuity(VLAN_DEV_INFO(dev)->real_dev, 1);

			/* Make PROMISC visible to the user. */
			flgs |= IFF_PROMISC;
			printk("VLAN (%s):  Setting underlying device (%s) to promiscious mode.\n",
			       dev->name, VLAN_DEV_INFO(dev)->real_dev->name);
			dev_change_flags(VLAN_DEV_INFO(dev)->real_dev, flgs);
		}
	} else {
		printk("VLAN (%s):  Underlying device (%s) has same MAC, not checking promiscious mode.\n",
		       dev->name, VLAN_DEV_INFO(dev)->real_dev->name);
	}

	return 0;
}

//.........这里部分代码省略.........
        }
        return -1;
    } else if (strncasecmp(cmd, "SCAN-CHANNELS ", 14)==0 || 
               strncasecmp(cmd, "COUNTRY ", 8)==0) {
        /* 
         * Set the available channels with WMI_SET_CHANNELPARAMS cmd
         * However, the channels will be limited by the eeprom regulator domain
         * Try to use a regulator domain which will not limited the channels range.
         */
        int i;
        int chan = 0;
        A_UINT16 *clist;
        struct ifreq ifr; 
        char ioBuf[256];
        WMI_CHANNEL_PARAMS_CMD *chParamCmd = (WMI_CHANNEL_PARAMS_CMD *)ioBuf;
        if (strncasecmp(cmd, "COUNTRY ", 8)==0) {
            char *country = cmd + 8;
            if (strcasecmp(country, "US")==0) {
                chan = 11;
            } else if (strcasecmp(country, "JP")==0) {
                chan = 14;
            } else if (strcasecmp(country, "EU")==0) {
                chan = 13;
            }
        } else if (sscanf(cmd, "%*s %d", &chan) != 1) {
            return -1;
        }
        if ( (chan != 11) && (chan != 13) && (chan != 14)) {
            return -1;
        }
        if (arPriv->arNextMode == AP_NETWORK) {
            return -1;
        }
        A_MEMZERO(&ifr, sizeof(ifr));
        A_MEMZERO(ioBuf, sizeof(ioBuf));

        chParamCmd->phyMode = WMI_11G_MODE;
        clist = chParamCmd->channelList;
        chParamCmd->numChannels = chan;
        chParamCmd->scanParam = 1;        
        for (i = 0; i < chan; i++) {
            clist[i] = wlan_ieee2freq(i + 1);
        }
        
        return android_do_ioctl_direct(dev, AR6000_IOCTL_WMI_SET_CHANNELPARAMS, &ifr, ioBuf);
    } else if (strncasecmp(cmd, "BTCOEXMODE ", 11)==0) {
        int mode;
        if (sscanf(cmd, "%*s %d", &mode)==1) {
            /* 
            * Android disable BT-COEX when obtaining dhcp packet except there is headset is connected 
             * It enable the BT-COEX after dhcp process is finished
             * We ignore since we have our way to do bt-coex during dhcp obtaining.
             */
            switch (mode) {
            case 1: /* Disable*/
                break;
            case 0: /* Enable */
                /* fall through */
            case 2: /* Sense*/
                /* fall through */
            default:
                break;
            }
            return 0; /* ignore it */
        }
        return -1;
    } else if (strcasecmp(cmd, "BTCOEXSCAN-START")==0) {
        /* Android enable or disable Bluetooth coexistence scan mode. When this mode is on,
         * some of the low-level scan parameters used by the driver are changed to
         * reduce interference with A2DP streaming.
         */
        return 0; /* ignore it since we have btfilter  */
    } else if (strcasecmp(cmd, "BTCOEXSCAN-STOP")==0) {
        return 0; /* ignore it since we have btfilter  */
    } else if (strncasecmp(cmd, "RXFILTER-ADD ", 13)==0) {
        return 0; /* ignore it */
    } else if (strncasecmp(cmd, "RXFILTER-REMOVE ", 16)==0) {
        return 0; /* ignoret it */
    } else if (strcasecmp(cmd, "RXFILTER-START")==0 || strcasecmp(cmd, "RXFILTER-STOP")==0) {
        unsigned int flags = dev->flags;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 34)
        int mc_count = dev->mc_count;   
#else
        int mc_count = netdev_mc_count(dev);
#endif
        if (strcasecmp(cmd, "RXFILTER-START")==0) {
            if (mc_count > 0 || (flags & IFF_MULTICAST) ) {
                flags &= ~IFF_MULTICAST;
            }
        } else {
            flags |= IFF_MULTICAST;
        }
        if (flags != dev->flags) {
            dev_change_flags(dev, flags);
        }
        return 0;
    }

    return -EOPNOTSUPP;
}

//.........这里部分代码省略.........
               strncasecmp(cmd, "COUNTRY ", 8)==0) {
        /* 
         * Set the available channels with WMI_SET_CHANNELPARAMS cmd
         * However, the channels will be limited by the eeprom regulator domain
         * Try to use a regulator domain which will not limited the channels range.
         */
        int i;
        int chan = 0;
        A_UINT16 *clist;
        struct ifreq ifr; 
        char ioBuf[256];
        WMI_CHANNEL_PARAMS_CMD *chParamCmd = (WMI_CHANNEL_PARAMS_CMD *)ioBuf;
        if (strncasecmp(cmd, "COUNTRY ", 8)==0) {
            char *country = cmd + 8;
            if (strcasecmp(country, "US")==0) {
                chan = 11;
            } else if (strcasecmp(country, "JP")==0) {
                chan = 14;
            } else if (strcasecmp(country, "EU")==0) {
                chan = 13;
            }
        } else if (sscanf(cmd, "%*s %d", &chan) != 1) {
            return -1;
        }
        if ( (chan != 11) && (chan != 13) && (chan != 14)) {
            return -1;
        }
        if (ar->arNextMode == AP_NETWORK) {
            return -1;
        }
        A_MEMZERO(&ifr, sizeof(ifr));
        A_MEMZERO(ioBuf, sizeof(ioBuf));

        chParamCmd->phyMode = WMI_11G_MODE;
        clist = chParamCmd->channelList;
        chParamCmd->numChannels = chan;
        chParamCmd->scanParam = 1;        
        for (i = 0; i < chan; i++) {
            clist[i] = wlan_ieee2freq(i + 1);
        }
        
        return android_do_ioctl_direct(dev, AR6000_IOCTL_WMI_SET_CHANNELPARAMS, &ifr, ioBuf);
    } else if (strncasecmp(cmd, "BTCOEXMODE ", 11)==0) {
        int mode;
        if (sscanf(cmd, "%*s %d", &mode)==1) {
            /* 
            * Android disable BT-COEX when obtaining dhcp packet except there is headset is connected 
             * It enable the BT-COEX after dhcp process is finished
             * We ignore since we have our way to do bt-coex during dhcp obtaining.
             */
            switch (mode) {
            case 1: /* Disable*/
                break;
            case 0: /* Enable */
                /* fall through */
            case 2: /* Sense*/
                /* fall through */
            default:
                break;
            }
            return 0; /* ignore it */
        }
        return -1;
    } else if (strcasecmp(cmd, "BTCOEXSCAN-START")==0) {
        /* Android enable or disable Bluetooth coexistence scan mode. When this mode is on,
         * some of the low-level scan parameters used by the driver are changed to
         * reduce interference with A2DP streaming.
         */
        return 0; /* ignore it since we have btfilter  */
    } else if (strcasecmp(cmd, "BTCOEXSCAN-STOP")==0) {
        return 0; /* ignore it since we have btfilter  */
    } else if (strncasecmp(cmd, "RXFILTER-ADD ", 13)==0) {
        return 0; /* ignore it */
    } else if (strncasecmp(cmd, "RXFILTER-REMOVE ", 16)==0) {
        return 0; /* ignoret it */
    } else if (strcasecmp(cmd, "RXFILTER-START")==0 || strcasecmp(cmd, "RXFILTER-STOP")==0) {
        unsigned int flags = dev->flags;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 34)
        int mc_count = dev->mc_count;   
#else
        int mc_count = netdev_mc_count(dev);
#endif           
        if (!(flags & IFF_UP)) {
            return -1;
        }
        if (strcasecmp(cmd, "RXFILTER-START")==0) {
            if (mc_count > 0 || (flags & IFF_MULTICAST) ) {
                flags &= ~IFF_MULTICAST;
            }
        } else {
            flags |= IFF_MULTICAST;
        }
        if (flags != dev->flags) {
            dev_change_flags(dev, flags);
        }
        return 0;
    }

    return -EOPNOTSUPP;
}

static int vlan_device_event(struct notifier_block *unused, unsigned long event,
			     void *ptr)
{
	struct net_device *dev = ptr;
	struct vlan_group *grp;
	struct vlan_info *vlan_info;
	int i, flgs;
	struct net_device *vlandev;
	struct vlan_dev_priv *vlan;
	LIST_HEAD(list);

	if (is_vlan_dev(dev))
		__vlan_device_event(dev, event);

	if ((event == NETDEV_UP) &&
	    (dev->features & NETIF_F_HW_VLAN_FILTER)) {
		pr_info("adding VLAN 0 to HW filter on device %s\n",
			dev->name);
		vlan_vid_add(dev, 0);
	}

	vlan_info = rtnl_dereference(dev->vlan_info);
	if (!vlan_info)
		goto out;
	grp = &vlan_info->grp;


	switch (event) {
	case NETDEV_CHANGE:
		
		for (i = 0; i < VLAN_N_VID; i++) {
			vlandev = vlan_group_get_device(grp, i);
			if (!vlandev)
				continue;

			netif_stacked_transfer_operstate(dev, vlandev);
		}
		break;

	case NETDEV_CHANGEADDR:
		
		for (i = 0; i < VLAN_N_VID; i++) {
			vlandev = vlan_group_get_device(grp, i);
			if (!vlandev)
				continue;

			flgs = vlandev->flags;
			if (!(flgs & IFF_UP))
				continue;

			vlan_sync_address(dev, vlandev);
		}
		break;

	case NETDEV_CHANGEMTU:
		for (i = 0; i < VLAN_N_VID; i++) {
			vlandev = vlan_group_get_device(grp, i);
			if (!vlandev)
				continue;

			if (vlandev->mtu <= dev->mtu)
				continue;

			dev_set_mtu(vlandev, dev->mtu);
		}
		break;

	case NETDEV_FEAT_CHANGE:
		
		for (i = 0; i < VLAN_N_VID; i++) {
			vlandev = vlan_group_get_device(grp, i);
			if (!vlandev)
				continue;

			vlan_transfer_features(dev, vlandev);
		}

		break;

	case NETDEV_DOWN:
		
		for (i = 0; i < VLAN_N_VID; i++) {
			vlandev = vlan_group_get_device(grp, i);
			if (!vlandev)
				continue;

			flgs = vlandev->flags;
			if (!(flgs & IFF_UP))
				continue;

			vlan = vlan_dev_priv(vlandev);
			if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
				dev_change_flags(vlandev, flgs & ~IFF_UP);
			netif_stacked_transfer_operstate(dev, vlandev);
		}
		break;

	case NETDEV_UP:
		
		for (i = 0; i < VLAN_N_VID; i++) {
//.........这里部分代码省略.........

//.........这里部分代码省略.........

	if (ifa == NULL && cmd != SIOCSIFADDR && cmd != SIOCSIFFLAGS) {
		ret = -EADDRNOTAVAIL;
		goto done;
	}

	switch(cmd) {
		case SIOCGIFADDR:	/* Get interface address */
			sin->sin_addr.s_addr = ifa->ifa_local;
			goto rarok;

		case SIOCGIFBRDADDR:	/* Get the broadcast address */
			sin->sin_addr.s_addr = ifa->ifa_broadcast;
			goto rarok;

		case SIOCGIFDSTADDR:	/* Get the destination address */
			sin->sin_addr.s_addr = ifa->ifa_address;
			goto rarok;

		case SIOCGIFNETMASK:	/* Get the netmask for the interface */
			sin->sin_addr.s_addr = ifa->ifa_mask;
			goto rarok;

		case SIOCSIFFLAGS:
			if (colon) {
				if (ifa == NULL) {
					ret = -EADDRNOTAVAIL;
					break;
				}
				if (!(ifr.ifr_flags&IFF_UP))
					inet_del_ifa(in_dev, ifap, 1);
				break;
			}
			ret = dev_change_flags(dev, ifr.ifr_flags);
			break;
	
		case SIOCSIFADDR:	/* Set interface address (and family) */
			if (inet_abc_len(sin->sin_addr.s_addr) < 0) {
				ret = -EINVAL;
				break;
			}

			if (!ifa) {
				if ((ifa = inet_alloc_ifa()) == NULL) {
					ret = -ENOBUFS;
					break;
				}
				if (colon)
					memcpy(ifa->ifa_label, ifr.ifr_name, IFNAMSIZ);
				else
					memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
			} else {
				ret = 0;
				if (ifa->ifa_local == sin->sin_addr.s_addr)
					break;
				inet_del_ifa(in_dev, ifap, 0);
				ifa->ifa_broadcast = 0;
				ifa->ifa_anycast = 0;
			}

			ifa->ifa_address =
			ifa->ifa_local = sin->sin_addr.s_addr;

			if (!(dev->flags&IFF_POINTOPOINT)) {
				ifa->ifa_prefixlen = inet_abc_len(ifa->ifa_address);
				ifa->ifa_mask = inet_make_mask(ifa->ifa_prefixlen);

//.........这里部分代码省略.........
        return -1;
    } else if (strncasecmp(cmd, "SCAN-CHANNELS ", 14)==0 || 
               strncasecmp(cmd, "COUNTRY ", 8)==0) {
        /* 
         * Set the available channels with WMI_SET_CHANNELPARAMS cmd
         * However, the channels will be limited by the eeprom regulator domain
         * Try to use a regulator domain which will not limited the channels range.
         */
        int i;
        int chan = 0;
        A_UINT16 *clist;
        struct ifreq ifr; 
        char ioBuf[256];
        WMI_CHANNEL_PARAMS_CMD *chParamCmd = (WMI_CHANNEL_PARAMS_CMD *)ioBuf;
        if (strncasecmp(cmd, "COUNTRY ", 8)==0) {
            char *country = cmd + 8;
            if (strcasecmp(country, "US")==0) {
                chan = 11;
            } else if (strcasecmp(country, "JP")==0) {
                chan = 14;
            } else if (strcasecmp(country, "EU")==0) {
                chan = 13;
            }
        } else if (sscanf(cmd, "%*s %d", &chan) != 1) {
            return -1;
        }
        if ( (chan != 11) && (chan != 13) && (chan != 14)) {
            return -1;
        }
        if (arPriv->arNextMode == AP_NETWORK) {
            return -1;
        }
        A_MEMZERO(&ifr, sizeof(ifr));
        A_MEMZERO(ioBuf, sizeof(ioBuf));

        chParamCmd->phyMode = WMI_11G_MODE;
        clist = chParamCmd->channelList;
        chParamCmd->numChannels = chan;
        chParamCmd->scanParam = 1;        
        for (i = 0; i < chan; i++) {
            clist[i] = wlan_ieee2freq(i + 1);
        }
        
        return android_do_ioctl_direct(dev, AR6000_IOCTL_WMI_SET_CHANNELPARAMS, &ifr, ioBuf);
    } else if (strncasecmp(cmd, "BTCOEXMODE ", 11)==0) {
        int mode;
        if (sscanf(cmd, "%*s %d", &mode)==1) {
            /* 
            * Android disable BT-COEX when obtaining dhcp packet except there is headset is connected 
             * It enable the BT-COEX after dhcp process is finished
             * We ignore since we have our way to do bt-coex during dhcp obtaining.
             */
            switch (mode) {
            case 1: /* Disable*/
                break;
            case 0: /* Enable */
                /* fall through */
            case 2: /* Sense*/
                /* fall through */
            default:
                break;
            }
            return 0; /* ignore it */
        }
        return -1;
    } else if (strcasecmp(cmd, "BTCOEXSCAN-START")==0) {
        /* Android enable or disable Bluetooth coexistence scan mode. When this mode is on,
         * some of the low-level scan parameters used by the driver are changed to
         * reduce interference with A2DP streaming.
         */
        return 0; /* ignore it since we have btfilter  */
    } else if (strcasecmp(cmd, "BTCOEXSCAN-STOP")==0) {
        return 0; /* ignore it since we have btfilter  */
    } else if (strncasecmp(cmd, "RXFILTER-ADD ", 13)==0) {
        return 0; /* ignore it */
    } else if (strncasecmp(cmd, "RXFILTER-REMOVE ", 16)==0) {
        return 0; /* ignoret it */
    } else if (strcasecmp(cmd, "RXFILTER-START")==0 || strcasecmp(cmd, "RXFILTER-STOP")==0) {
        unsigned int flags = dev->flags;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 34)
        int mc_count = dev->mc_count;   
#else
        int mc_count = netdev_mc_count(dev);
#endif
        if (strcasecmp(cmd, "RXFILTER-START")==0) {
            if (mc_count > 0 || (flags & IFF_MULTICAST) ) {
                //flags &= ~IFF_MULTICAST;							//to always enable multicast
                flags |= IFF_MULTICAST;
            }
        } else {
            flags |= IFF_MULTICAST;
        }
        if (flags != dev->flags) {
            dev_change_flags(dev, flags);
        }
        return 0;
    }

    return -EOPNOTSUPP;
}

int rst_restore_netdev(struct cpt_context *ctx)
{
	struct net *net = get_exec_env()->ve_netns;
	int err;
	loff_t sec = ctx->sections[CPT_SECT_NET_DEVICE];
	loff_t endsec;
	struct cpt_section_hdr h;
	struct cpt_netdev_image di;
	struct net_device *dev;

	get_exec_env()->disable_net = 1;

	if (sec == CPT_NULL)
		return 0;

	err = ctx->pread(&h, sizeof(h), ctx, sec);
	if (err)
		return err;
	if (h.cpt_section != CPT_SECT_NET_DEVICE || h.cpt_hdrlen < sizeof(h))
		return -EINVAL;

	endsec = sec + h.cpt_next;
	sec += h.cpt_hdrlen;
	while (sec < endsec) {
		loff_t pos;
		struct net_device *dev_new;
		struct netdev_rst *ops;

		err = rst_get_object(CPT_OBJ_NET_DEVICE, sec, &di, ctx);
		if (err)
			return err;

		rtnl_lock();
		pos = sec + di.cpt_hdrlen;
		if (di.cpt_next > sizeof(di)) {
			struct cpt_object_hdr hdr;
			err = ctx->pread(&hdr, sizeof(struct cpt_object_hdr),
					ctx, sec + di.cpt_hdrlen);
			if (err)
				goto out;

			ops = NULL;
			while (1) {
				ops = netdev_find_rst(hdr.cpt_object, ops);
				if (ops == NULL)
					break;

				err = ops->ndo_rst(sec, &di, &rst_ops, ctx);
				if (!err) {
					pos += hdr.cpt_next;
					break;
				} else if (err < 0) {
					eprintk_ctx("netdev %d rst failed %d\n",
							hdr.cpt_object, err);
					goto out;
				}
			}
		}

		dev = __dev_get_by_name(net, di.cpt_name);
		if (dev) {
			if (dev->ifindex != di.cpt_index) {
				dev_new = __dev_get_by_index(net, di.cpt_index);
				if (!dev_new) {
					write_lock_bh(&dev_base_lock);
					hlist_del(&dev->index_hlist);
					if (dev->iflink == dev->ifindex)
						dev->iflink = di.cpt_index;
					dev->ifindex = di.cpt_index;
					hlist_add_head(&dev->index_hlist,
							dev_index_hash(net, dev->ifindex));
					write_unlock_bh(&dev_base_lock);
				} else {
					write_lock_bh(&dev_base_lock);
					hlist_del(&dev->index_hlist);
					hlist_del(&dev_new->index_hlist);
					if (dev_new->iflink == dev_new->ifindex)
						dev_new->iflink = dev->ifindex;
					dev_new->ifindex = dev->ifindex;
					if (dev->iflink == dev->ifindex)
						dev->iflink = di.cpt_index;
					dev->ifindex = di.cpt_index;
					hlist_add_head(&dev->index_hlist,
							dev_index_hash(net, dev->ifindex));
					hlist_add_head(&dev_new->index_hlist,
							dev_index_hash(net, dev_new->ifindex));
					write_unlock_bh(&dev_base_lock);
				}
			}
			if (di.cpt_flags^dev->flags) {
				err = dev_change_flags(dev, di.cpt_flags);
				if (err)
					eprintk_ctx("dev_change_flags err: %d\n", err);
			}
			while (pos < sec + di.cpt_next) {
				struct cpt_object_hdr hdr;
				err = ctx->pread(&hdr, sizeof(struct cpt_object_hdr),
						ctx, pos);
				if (err)
					goto out;
//.........这里部分代码省略.........

/*
 *	Perform the SIOCxIFxxx calls, inside rtnl_lock()
 */
static int dev_ifsioc(struct net *net, struct ifreq *ifr, unsigned int cmd)
{
	int err;
	struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
	const struct net_device_ops *ops;

	if (!dev)
		return -ENODEV;

	ops = dev->netdev_ops;

	switch (cmd) {
	case SIOCSIFFLAGS:	/* Set interface flags */
		return dev_change_flags(dev, ifr->ifr_flags);

	case SIOCSIFMETRIC:	/* Set the metric on the interface
				   (currently unused) */
		return -EOPNOTSUPP;

	case SIOCSIFMTU:	/* Set the MTU of a device */
		return dev_set_mtu(dev, ifr->ifr_mtu);

	case SIOCSIFHWADDR:
		if (dev->addr_len > sizeof(struct sockaddr))
			return -EINVAL;
		return dev_set_mac_address(dev, &ifr->ifr_hwaddr);

	case SIOCSIFHWBROADCAST:
		if (ifr->ifr_hwaddr.sa_family != dev->type)
			return -EINVAL;
		memcpy(dev->broadcast, ifr->ifr_hwaddr.sa_data,
		       min(sizeof(ifr->ifr_hwaddr.sa_data),
			   (size_t)dev->addr_len));
		call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
		return 0;

	case SIOCSIFMAP:
		if (ops->ndo_set_config) {
			if (!netif_device_present(dev))
				return -ENODEV;
			return ops->ndo_set_config(dev, &ifr->ifr_map);
		}
		return -EOPNOTSUPP;

	case SIOCADDMULTI:
		if (!ops->ndo_set_rx_mode ||
		    ifr->ifr_hwaddr.sa_family != AF_UNSPEC)
			return -EINVAL;
		if (!netif_device_present(dev))
			return -ENODEV;
		return dev_mc_add_global(dev, ifr->ifr_hwaddr.sa_data);

	case SIOCDELMULTI:
		if (!ops->ndo_set_rx_mode ||
		    ifr->ifr_hwaddr.sa_family != AF_UNSPEC)
			return -EINVAL;
		if (!netif_device_present(dev))
			return -ENODEV;
		return dev_mc_del_global(dev, ifr->ifr_hwaddr.sa_data);

	case SIOCSIFTXQLEN:
		if (ifr->ifr_qlen < 0)
			return -EINVAL;
		return dev_change_tx_queue_len(dev, ifr->ifr_qlen);

	case SIOCSIFNAME:
		ifr->ifr_newname[IFNAMSIZ-1] = '\0';
		return dev_change_name(dev, ifr->ifr_newname);

	case SIOCSHWTSTAMP:
		err = net_hwtstamp_validate(ifr);
		if (err)
			return err;
		/* fall through */

	/*
	 *	Unknown or private ioctl
	 */
	default:
		if ((cmd >= SIOCDEVPRIVATE &&
		    cmd <= SIOCDEVPRIVATE + 15) ||
		    cmd == SIOCBONDENSLAVE ||
		    cmd == SIOCBONDRELEASE ||
		    cmd == SIOCBONDSETHWADDR ||
		    cmd == SIOCBONDSLAVEINFOQUERY ||
		    cmd == SIOCBONDINFOQUERY ||
		    cmd == SIOCBONDCHANGEACTIVE ||
		    cmd == SIOCGMIIPHY ||
		    cmd == SIOCGMIIREG ||
		    cmd == SIOCSMIIREG ||
		    cmd == SIOCBRADDIF ||
		    cmd == SIOCBRDELIF ||
		    cmd == SIOCSHWTSTAMP ||
		    cmd == SIOCGHWTSTAMP ||
		    cmd == SIOCWANDEV) {
			err = -EOPNOTSUPP;
			if (ops->ndo_do_ioctl) {
//.........这里部分代码省略.........

static int vlan_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
{
	struct net_device *dev = (struct net_device *)(ptr);
	struct vlan_group *grp = NULL;
	int i, flgs;
	struct net_device *vlandev = NULL;

	spin_lock_bh(&vlan_group_lock);
	grp = __vlan_find_group(dev->ifindex);
	spin_unlock_bh(&vlan_group_lock);

	if (!grp)
		goto out;

	/* It is OK that we do not hold the group lock right now,
	 * as we run under the RTNL lock.
	 */

	switch (event) {
	case NETDEV_CHANGEADDR:
	case NETDEV_GOING_DOWN:
		/* Ignore for now */
		break;

	case NETDEV_DOWN:
		/* Put all VLANs for this dev in the down state too.  */
		for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
			vlandev = grp->vlan_devices[i];
			if (!vlandev)
				continue;

			flgs = vlandev->flags;
			if (!(flgs & IFF_UP))
				continue;

			dev_change_flags(vlandev, flgs & ~IFF_UP);
		}
		break;

	case NETDEV_UP:
		/* Put all VLANs for this dev in the up state too.  */
		for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
			vlandev = grp->vlan_devices[i];
			if (!vlandev)
				continue;
				
			flgs = vlandev->flags;
			if (flgs & IFF_UP)
				continue;

			dev_change_flags(vlandev, flgs | IFF_UP);
		}
		break;
		
	case NETDEV_UNREGISTER:
		/* Delete all VLANs for this dev. */
		for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
			int ret;

			vlandev = grp->vlan_devices[i];
			if (!vlandev)
				continue;

			ret = unregister_vlan_dev(dev,
						  VLAN_DEV_INFO(vlandev)->vlan_id);

			dev_put(vlandev);
			unregister_netdevice(vlandev);

			/* Group was destroyed? */
			if (ret == 1)
				break;
		}
		break;
	};

out:
	return NOTIFY_DONE;
}

static int vlan_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
{
	struct net_device *dev = ptr;
	struct vlan_group *grp = vlan_find_group(dev->ifindex);
	int i, flgs;
	struct net_device *vlandev;

	if (!grp)
		goto out;

	/* It is OK that we do not hold the group lock right now,
	 * as we run under the RTNL lock.
	 */

	switch (event) {
	case NETDEV_CHANGE:
		/* Propagate real device state to vlan devices */
		for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
			vlandev = vlan_group_get_device(grp, i);
			if (!vlandev)
				continue;

			vlan_transfer_operstate(dev, vlandev);
		}
		break;

	case NETDEV_DOWN:
		/* Put all VLANs for this dev in the down state too.  */
		for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
			vlandev = vlan_group_get_device(grp, i);
			if (!vlandev)
				continue;

			flgs = vlandev->flags;
			if (!(flgs & IFF_UP))
				continue;

			dev_change_flags(vlandev, flgs & ~IFF_UP);
		}
		break;

	case NETDEV_UP:
		/* Put all VLANs for this dev in the up state too.  */
		for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
			vlandev = vlan_group_get_device(grp, i);
			if (!vlandev)
				continue;

			flgs = vlandev->flags;
			if (flgs & IFF_UP)
				continue;

			dev_change_flags(vlandev, flgs | IFF_UP);
		}
		break;

	case NETDEV_UNREGISTER:
		/* Delete all VLANs for this dev. */
		for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
			int ret;

			vlandev = vlan_group_get_device(grp, i);
			if (!vlandev)
				continue;

                        flgs = vlandev->flags;
                        if (!(flgs & IFF_UP))
                                continue;

			ret = unregister_vlan_dev(dev,
						  VLAN_DEV_INFO(vlandev)->vlan_id);

			unregister_netdevice(vlandev);

			/* Group was destroyed? */
			if (ret == 1)
				break;
		}
		break;
	};

out:
	return NOTIFY_DONE;
}

static int change_flags(struct net_device *dev, unsigned long new_flags)
{
	return dev_change_flags(dev, (unsigned int)new_flags, NULL);
}

static struct vport *vxlan_tnl_create(const struct vport_parms *parms)
{
	struct net *net = ovs_dp_get_net(parms->dp);
	struct nlattr *options = parms->options;
	struct net_device *dev;
	struct vport *vport;
	struct nlattr *a;
	int err;
	struct vxlan_config conf = {
		.no_share = true,
		.flags = VXLAN_F_COLLECT_METADATA,
	};

	if (!options) {
		err = -EINVAL;
		goto error;
	}

	a = nla_find_nested(options, OVS_TUNNEL_ATTR_DST_PORT);
	if (a && nla_len(a) == sizeof(u16)) {
		conf.dst_port = htons(nla_get_u16(a));
	} else {
		/* Require destination port from userspace. */
		err = -EINVAL;
		goto error;
	}

	vport = ovs_vport_alloc(0, &ovs_vxlan_netdev_vport_ops, parms);
	if (IS_ERR(vport))
		return vport;

	a = nla_find_nested(options, OVS_TUNNEL_ATTR_EXTENSION);
	if (a) {
		err = vxlan_configure_exts(vport, a, &conf);
		if (err) {
			ovs_vport_free(vport);
			goto error;
		}
	}

	rtnl_lock();
	dev = vxlan_dev_create(net, parms->name, NET_NAME_USER, &conf);
	if (IS_ERR(dev)) {
		rtnl_unlock();
		ovs_vport_free(vport);
		return ERR_CAST(dev);
	}

	dev_change_flags(dev, dev->flags | IFF_UP);
	rtnl_unlock();
	return vport;
error:
	return ERR_PTR(err);
}

static struct vport *vxlan_create(const struct vport_parms *parms)
{
	struct vport *vport;

	vport = vxlan_tnl_create(parms);
	if (IS_ERR(vport))
		return vport;

	return ovs_netdev_link(vport, parms->name);
}

static int vxlan_get_egress_tun_info(struct vport *vport, struct sk_buff *skb,
				     struct dp_upcall_info *upcall)
{
	struct vxlan_dev *vxlan = netdev_priv(vport->dev);
	struct net *net = ovs_dp_get_net(vport->dp);
	unsigned short family = ip_tunnel_info_af(upcall->egress_tun_info);
	__be16 dst_port = vxlan_dev_dst_port(vxlan, family);
	__be16 src_port;
	int port_min;
	int port_max;

	inet_get_local_port_range(net, &port_min, &port_max);
	src_port = udp_flow_src_port(net, skb, 0, 0, true);

	return ovs_tunnel_get_egress_info(upcall, net,
					  skb, IPPROTO_UDP,
					  src_port, dst_port);
}

static struct vport_ops ovs_vxlan_netdev_vport_ops = {
	.type			= OVS_VPORT_TYPE_VXLAN,
	.create			= vxlan_create,
	.destroy		= ovs_netdev_tunnel_destroy,
	.get_options		= vxlan_get_options,
	.send			= ovs_netdev_send,
	.get_egress_tun_info	= vxlan_get_egress_tun_info,
};

static int __init ovs_vxlan_tnl_init(void)
{
	return ovs_vport_ops_register(&ovs_vxlan_netdev_vport_ops);
}

static void __exit ovs_vxlan_tnl_exit(void)
//.........这里部分代码省略.........

static int vlan_device_event(struct notifier_block *unused, unsigned long event,
			     void *ptr)
{
	struct net_device *dev = ptr;
	struct vlan_group *grp;
	struct vlan_info *vlan_info;
	int i, flgs;
	struct net_device *vlandev;
	struct vlan_dev_priv *vlan;
	LIST_HEAD(list);

	if (is_vlan_dev(dev))
		__vlan_device_event(dev, event);

	if ((event == NETDEV_UP) &&
	    (dev->features & NETIF_F_HW_VLAN_FILTER)) {
		pr_info("adding VLAN 0 to HW filter on device %s\n",
			dev->name);
		vlan_vid_add(dev, 0);
	}

	vlan_info = rtnl_dereference(dev->vlan_info);
	if (!vlan_info)
		goto out;
	grp = &vlan_info->grp;

	/* It is OK that we do not hold the group lock right now,
	 * as we run under the RTNL lock.
	 */

	switch (event) {
	case NETDEV_CHANGE:
		/* Propagate real device state to vlan devices */
		for (i = 0; i < VLAN_N_VID; i++) {
			vlandev = vlan_group_get_device(grp, i);
			if (!vlandev)
				continue;

			netif_stacked_transfer_operstate(dev, vlandev);
		}
		break;

	case NETDEV_CHANGEADDR:
		/* Adjust unicast filters on underlying device */
		for (i = 0; i < VLAN_N_VID; i++) {
			vlandev = vlan_group_get_device(grp, i);
			if (!vlandev)
				continue;

			flgs = vlandev->flags;
			if (!(flgs & IFF_UP))
				continue;

			vlan_sync_address(dev, vlandev);
		}
		break;

	case NETDEV_CHANGEMTU:
		for (i = 0; i < VLAN_N_VID; i++) {
			vlandev = vlan_group_get_device(grp, i);
			if (!vlandev)
				continue;

			if (vlandev->mtu <= dev->mtu)
				continue;

			dev_set_mtu(vlandev, dev->mtu);
		}
		break;

	case NETDEV_FEAT_CHANGE:
		/* Propagate device features to underlying device */
		for (i = 0; i < VLAN_N_VID; i++) {
			vlandev = vlan_group_get_device(grp, i);
			if (!vlandev)
				continue;

			vlan_transfer_features(dev, vlandev);
		}

		break;

	case NETDEV_DOWN:
		if (dev->features & NETIF_F_HW_VLAN_FILTER)
			vlan_vid_del(dev, 0);

		/* Put all VLANs for this dev in the down state too.  */
		for (i = 0; i < VLAN_N_VID; i++) {
			vlandev = vlan_group_get_device(grp, i);
			if (!vlandev)
				continue;

			flgs = vlandev->flags;
			if (!(flgs & IFF_UP))
				continue;

			vlan = vlan_dev_priv(vlandev);
			if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
				dev_change_flags(vlandev, flgs & ~IFF_UP);
			netif_stacked_transfer_operstate(dev, vlandev);
//.........这里部分代码省略.........