- 根目录:
- drivers
- net
- ipvlan
- ipvlan_main.c
/* Copyright (c) 2014 Mahesh Bandewar <maheshb@google.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
*/
#include "ipvlan.h"
void ipvlan_adjust_mtu(struct ipvl_dev *ipvlan, struct net_device *dev)
{
ipvlan->dev->mtu = dev->mtu - ipvlan->mtu_adj;
}
void ipvlan_set_port_mode(struct ipvl_port *port, u32 nval)
{
struct ipvl_dev *ipvlan;
if (port->mode != nval) {
list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
if (nval == IPVLAN_MODE_L3)
ipvlan->dev->flags |= IFF_NOARP;
else
ipvlan->dev->flags &= ~IFF_NOARP;
}
port->mode = nval;
}
}
static int ipvlan_port_create(struct net_device *dev)
{
struct ipvl_port *port;
int err, idx;
if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) {
netdev_err(dev, "Master is either lo or non-ether device\n");
return -EINVAL;
}
if (netif_is_macvlan_port(dev)) {
netdev_err(dev, "Master is a macvlan port.\n");
return -EBUSY;
}
port = kzalloc(sizeof(struct ipvl_port), GFP_KERNEL);
if (!port)
return -ENOMEM;
port->dev = dev;
port->mode = IPVLAN_MODE_L3;
INIT_LIST_HEAD(&port->ipvlans);
for (idx = 0; idx < IPVLAN_HASH_SIZE; idx++)
INIT_HLIST_HEAD(&port->hlhead[idx]);
err = netdev_rx_handler_register(dev, ipvlan_handle_frame, port);
if (err)
goto err;
dev->priv_flags |= IFF_IPVLAN_MASTER;
return 0;
err:
kfree_rcu(port, rcu);
return err;
}
static void ipvlan_port_destroy(struct net_device *dev)
{
struct ipvl_port *port = ipvlan_port_get_rtnl(dev);
dev->priv_flags &= ~IFF_IPVLAN_MASTER;
netdev_rx_handler_unregister(dev);
kfree_rcu(port, rcu);
}
/* ipvlan network devices have devices nesting below it and are a special
* "super class" of normal network devices; split their locks off into a
* separate class since they always nest.
*/
static struct lock_class_key ipvlan_netdev_xmit_lock_key;
static struct lock_class_key ipvlan_netdev_addr_lock_key;
#define IPVLAN_FEATURES \
(NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \
NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
#define IPVLAN_STATE_MASK \
((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
static void ipvlan_set_lockdep_class_one(struct net_device *dev,
struct netdev_queue *txq,
void *_unused)
{
lockdep_set_class(&txq->_xmit_lock, &ipvlan_netdev_xmit_lock_key);
}
static void ipvlan_set_lockdep_class(struct net_device *dev)
{
lockdep_set_class(&dev->addr_list_lock, &ipvlan_netdev_addr_lock_key);
netdev_for_each_tx_queue(dev, ipvlan_set_lockdep_class_one, NULL);
}
static int ipvlan_init(struct net_device *dev)
{
struct ipvl_dev *ipvlan = netdev_priv(dev);
const struct net_device *phy_dev = ipvlan->phy_dev;
dev->state = (dev->state & ~IPVLAN_STATE_MASK) |
(phy_dev->state & IPVLAN_STATE_MASK);
dev->features = phy_dev->features & IPVLAN_FEATURES;
dev->features |= NETIF_F_LLTX;
dev->gso_max_size = phy_dev->gso_max_size;
dev->hard_header_len = phy_dev->hard_header_len;
ipvlan_set_lockdep_class(dev);
ipvlan->pcpu_stats = alloc_percpu(struct ipvl_pcpu_stats);
if (!ipvlan->pcpu_stats)
return -ENOMEM;
return 0;
}
static void ipvlan_uninit(struct net_device *dev)
{
struct ipvl_dev *ipvlan = netdev_priv(dev);
struct ipvl_port *port = ipvlan->port;
free_percpu(ipvlan->pcpu_stats);
port->count -= 1;
if (!port->count)
ipvlan_port_destroy(port->dev);
}
static int ipvlan_open(struct net_device *dev)
{
struct ipvl_dev *ipvlan = netdev_priv(dev);
struct net_device *phy_dev = ipvlan->phy_dev;
struct ipvl_addr *addr;
if (ipvlan->port->mode == IPVLAN_MODE_L3)
dev->flags |= IFF_NOARP;
else
dev->flags &= ~IFF_NOARP;
if (ipvlan->ipv6cnt > 0 || ipvlan->ipv4cnt > 0) {
list_for_each_entry(addr, &ipvlan->addrs, anode)
ipvlan_ht_addr_add(ipvlan, addr);
}
return dev_uc_add(phy_dev, phy_dev->dev_addr);
}
static int ipvlan_stop(struct net_device *dev)
{
struct ipvl_dev *ipvlan = netdev_priv(dev);
struct net_device *phy_dev = ipvlan->phy_dev;
struct ipvl_addr *addr;
dev_uc_unsync(phy_dev, dev);
dev_mc_unsync(phy_dev, dev);
dev_uc_del(phy_dev, phy_dev->dev_addr);
if (ipvlan->ipv6cnt > 0 || ipvlan->ipv4cnt > 0) {
list_for_each_entry(addr, &ipvlan->addrs, anode)
ipvlan_ht_addr_del(addr, !dev->dismantle);
}
return 0;
}
static netdev_tx_t ipvlan_start_xmit(struct sk_buff *skb,
struct net_device *dev)
{
const struct ipvl_dev *ipvlan = netdev_priv(dev);
int skblen = skb->len;
int ret;
ret = ipvlan_queue_xmit(skb, dev);
if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
struct ipvl_pcpu_stats *pcptr;
pcptr = this_cpu_ptr(ipvlan->pcpu_stats);
u64_stats_update_begin(&pcptr->syncp);
pcptr->tx_pkts++;
pcptr->tx_bytes += skblen;
u64_stats_update_end(&pcptr->syncp);
} else {
this_cpu_inc(ipvlan->pcpu_stats->tx_drps);
}
return ret;
}
static netdev_features_t ipvlan_fix_features(struct net_device *dev,
netdev_features_t features)
{
struct ipvl_dev *ipvlan = netdev_priv(dev);
return features & (ipvlan->sfeatures | ~IPVLAN_FEATURES);
}
static void ipvlan_change_rx_flags(struct net_device *dev, int change)
{
struct ipvl_dev *ipvlan = netdev_priv(dev);
struct net_device *phy_dev = ipvlan->phy_dev;
if (change & IFF_ALLMULTI)
dev_set_allmulti(phy_dev, dev->flags & IFF_ALLMULTI? 1 : -1);
}
static void ipvlan_set_broadcast_mac_filter(struct ipvl_dev *ipvlan, bool set)
{
struct net_device *dev = ipvlan->dev;
unsigned int hashbit = ipvlan_mac_hash(dev->broadcast);
if (set && !test_bit(hashbit, ipvlan->mac_filters))
__set_bit(hashbit, ipvlan->mac_filters);
else if (!set && test_bit(hashbit, ipvlan->mac_filters))
__clear_bit(hashbit, ipvlan->mac_filters);
}
static void ipvlan_set_multicast_mac_filter(struct net_device *dev)
{
struct ipvl_dev *ipvlan = netdev_priv(dev);
if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
bitmap_fill(ipvlan->mac_filters, IPVLAN_MAC_FILTER_SIZE);
} else {
struct netdev_hw_addr *ha;
DECLARE_BITMAP(mc_filters, IPVLAN_MAC_FILTER_SIZE);
bitmap_zero(mc_filters, IPVLAN_MAC_FILTER_SIZE);
netdev_for_each_mc_addr(ha, dev)
__set_bit(ipvlan_mac_hash(ha->addr), mc_filters);
bitmap_copy(ipvlan->mac_filters, mc_filters,
IPVLAN_MAC_FILTER_SIZE);
}
dev_uc_sync(ipvlan->phy_dev, dev);
dev_mc_sync(ipvlan->phy_dev, dev);
}
static struct rtnl_link_stats64 *ipvlan_get_stats64(struct net_device *dev,
struct rtnl_link_stats64 *s)
{
struct ipvl_dev *ipvlan = netdev_priv(dev);
if (ipvlan->pcpu_stats) {
struct ipvl_pcpu_stats *pcptr;
u64 rx_pkts, rx_bytes, rx_mcast, tx_pkts, tx_bytes;
u32 rx_errs = 0, tx_drps = 0;
u32 strt;
int idx;
for_each_possible_cpu(idx) {
pcptr = per_cpu_ptr(ipvlan->pcpu_stats, idx);
do {
strt= u64_stats_fetch_begin_irq(&pcptr->syncp);
rx_pkts = pcptr->rx_pkts;
rx_bytes = pcptr->rx_bytes;
rx_mcast = pcptr->rx_mcast;
tx_pkts = pcptr->tx_pkts;
tx_bytes = pcptr->tx_bytes;
} while (u64_stats_fetch_retry_irq(&pcptr->syncp,
strt));
s->rx_packets += rx_pkts;
s->rx_bytes += rx_bytes;
s->multicast += rx_mcast;
s->tx_packets += tx_pkts;
s->tx_bytes += tx_bytes;
/* u32 values are updated without syncp protection. */
rx_errs += pcptr->rx_errs;
tx_drps += pcptr->tx_drps;
}
s->rx_errors = rx_errs;
s->rx_dropped = rx_errs;
s->tx_dropped = tx_drps;
}
return s;
}
static int ipvlan_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
{
struct ipvl_dev *ipvlan = netdev_priv(dev);
struct net_device *phy_dev = ipvlan->phy_dev;
return vlan_vid_add(phy_dev, proto, vid);
}
static int ipvlan_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
u16 vid)
{
struct ipvl_dev *ipvlan = netdev_priv(dev);
struct net_device *phy_dev = ipvlan->phy_dev;
vlan_vid_del(phy_dev, proto, vid);
return 0;
}
static int ipvlan_get_iflink(const struct net_device *dev)
{
struct ipvl_dev *ipvlan = netdev_priv(dev);
return ipvlan->phy_dev->ifindex;
}
static const struct net_device_ops ipvlan_netdev_ops = {
.ndo_init = ipvlan_init,
.ndo_uninit = ipvlan_uninit,
.ndo_open = ipvlan_open,
.ndo_stop = ipvlan_stop,
.ndo_start_xmit = ipvlan_start_xmit,
.ndo_fix_features = ipvlan_fix_features,
.ndo_change_rx_flags = ipvlan_change_rx_flags,
.ndo_set_rx_mode = ipvlan_set_multicast_mac_filter,
.ndo_get_stats64 = ipvlan_get_stats64,
.ndo_vlan_rx_add_vid = ipvlan_vlan_rx_add_vid,
.ndo_vlan_rx_kill_vid = ipvlan_vlan_rx_kill_vid,
.ndo_get_iflink = ipvlan_get_iflink,
};
static int ipvlan_hard_header(struct sk_buff *skb, struct net_device *dev,
unsigned short type, const void *daddr,
const void *saddr, unsigned len)
{
const struct ipvl_dev *ipvlan = netdev_priv(dev);
struct net_device *phy_dev = ipvlan->phy_dev;
/* TODO Probably use a different field than dev_addr so that the
* mac-address on the virtual device is portable and can be carried
* while the packets use the mac-addr on the physical device.
*/
return dev_hard_header(skb, phy_dev, type, daddr,
saddr ? : dev->dev_addr, len);
}
static const struct header_ops ipvlan_header_ops = {
.create = ipvlan_hard_header,
.parse = eth_header_parse,
.cache = eth_header_cache,
.cache_update = eth_header_cache_update,
};
static int ipvlan_ethtool_get_settings(struct net_device *dev,
struct ethtool_cmd *cmd)
{
const struct ipvl_dev *ipvlan = netdev_priv(dev);
return __ethtool_get_settings(ipvlan->phy_dev, cmd);
}
static void ipvlan_ethtool_get_drvinfo(struct net_device *dev,
struct ethtool_drvinfo *drvinfo)
{
strlcpy(drvinfo->driver, IPVLAN_DRV, sizeof(drvinfo->driver));
strlcpy(drvinfo->version, IPV_DRV_VER, sizeof(drvinfo->version));
}
static u32 ipvlan_ethtool_get_msglevel(struct net_device *dev)
{
const struct ipvl_dev *ipvlan = netdev_priv(dev);
return ipvlan->msg_enable;
}
static void ipvlan_ethtool_set_msglevel(struct net_device *dev, u32 value)
{
struct ipvl_dev *ipvlan = netdev_priv(dev);
ipvlan->msg_enable = value;
}
static const struct ethtool_ops ipvlan_ethtool_ops = {
.get_link = ethtool_op_get_link,
.get_settings = ipvlan_ethtool_get_settings,
.get_drvinfo = ipvlan_ethtool_get_drvinfo,
.get_msglevel = ipvlan_ethtool_get_msglevel,
.set_msglevel = ipvlan_ethtool_set_msglevel,
};
static int ipvlan_nl_changelink(struct net_device *dev,
struct nlattr *tb[], struct nlattr *data[])
{
struct ipvl_dev *ipvlan = netdev_priv(dev);
struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev);
if (data && data[IFLA_IPVLAN_MODE]) {
u16 nmode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
ipvlan_set_port_mode(port, nmode);
}
return 0;
}
static size_t ipvlan_nl_getsize(const struct net_device *dev)
{
return (0
+ nla_total_size(2) /* IFLA_IPVLAN_MODE */
);
}
static int ipvlan_nl_validate(struct nlattr *tb[], struct nlattr *data[])
{
if (data && data[IFLA_IPVLAN_MODE]) {
u16 mode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
if (mode < IPVLAN_MODE_L2 || mode >= IPVLAN_MODE_MAX)
return -EINVAL;
}
return 0;
}
static int ipvlan_nl_fillinfo(struct sk_buff *skb,
const struct net_device *dev)
{
struct ipvl_dev *ipvlan = netdev_priv(dev);
struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev);
int ret = -EINVAL;
if (!port)
goto err;
ret = -EMSGSIZE;
if (nla_put_u16(skb, IFLA_IPVLAN_MODE, port->mode))
goto err;
return 0;
err:
return ret;
}
static int ipvlan_link_new(struct net *src_net, struct net_device *dev,
struct nlattr *tb[], struct nlattr *data[])
{
struct ipvl_dev *ipvlan = netdev_priv(dev);
struct ipvl_port *port;
struct net_device *phy_dev;
int err;
if (!tb[IFLA_LINK])
return -EINVAL;
phy_dev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
if (!phy_dev)
return -ENODEV;
if (netif_is_ipvlan(phy_dev)) {
struct ipvl_dev *tmp = netdev_priv(phy_dev);
phy_dev = tmp->phy_dev;
} else if (!netif_is_ipvlan_port(phy_dev)) {
err = ipvlan_port_create(phy_dev);
if (err < 0)
return err;
}
port = ipvlan_port_get_rtnl(phy_dev);
if (data && data[IFLA_IPVLAN_MODE])
port->mode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
ipvlan->phy_dev = phy_dev;
ipvlan->dev = dev;
ipvlan->port = port;
ipvlan->sfeatures = IPVLAN_FEATURES;
INIT_LIST_HEAD(&ipvlan->addrs);
ipvlan->ipv4cnt = 0;
ipvlan->ipv6cnt = 0;
/* TODO Probably put random address here to be presented to the
* world but keep using the physical-dev address for the outgoing
* packets.
*/
memcpy(dev->dev_addr, phy_dev->dev_addr, ETH_ALEN);
dev->priv_flags |= IFF_IPVLAN_SLAVE;
port->count += 1;
err = register_netdevice(dev);
if (err < 0)
goto ipvlan_destroy_port;
err = netdev_upper_dev_link(phy_dev, dev);
if (err)
goto ipvlan_destroy_port;
list_add_tail_rcu(&ipvlan->pnode, &port->ipvlans);
netif_stacked_transfer_operstate(phy_dev, dev);
return 0;
ipvlan_destroy_port:
port->count -= 1;
if (!port->count)
ipvlan_port_destroy(phy_dev);
return err;
}
static void ipvlan_link_delete(struct net_device *dev, struct list_head *head)
{
struct ipvl_dev *ipvlan = netdev_priv(dev);
struct ipvl_addr *addr, *next;
if (ipvlan->ipv6cnt > 0 || ipvlan->ipv4cnt > 0) {
list_for_each_entry_safe(addr, next, &ipvlan->addrs, anode) {
ipvlan_ht_addr_del(addr, !dev->dismantle);
list_del(&addr->anode);
}
}
list_del_rcu(&ipvlan->pnode);
unregister_netdevice_queue(dev, head);
netdev_upper_dev_unlink(ipvlan->phy_dev, dev);
}
static void ipvlan_link_setup(struct net_device *dev)
{
ether_setup(dev);
dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
dev->priv_flags |= IFF_UNICAST_FLT;
dev->netdev_ops = &ipvlan_netdev_ops;
dev->destructor = free_netdev;
dev->header_ops = &ipvlan_header_ops;
dev->ethtool_ops = &ipvlan_ethtool_ops;
dev->tx_queue_len = 0;
}
static const struct nla_policy ipvlan_nl_policy[IFLA_IPVLAN_MAX + 1] =
{
[IFLA_IPVLAN_MODE] = { .type = NLA_U16 },
};
static struct rtnl_link_ops ipvlan_link_ops = {
.kind = "ipvlan",
.priv_size = sizeof(struct ipvl_dev),
.get_size = ipvlan_nl_getsize,
.policy = ipvlan_nl_policy,
.validate = ipvlan_nl_validate,
.fill_info = ipvlan_nl_fillinfo,
.changelink = ipvlan_nl_changelink,
.maxtype = IFLA_IPVLAN_MAX,
.setup = ipvlan_link_setup,
.newlink = ipvlan_link_new,
.dellink = ipvlan_link_delete,
};
static int ipvlan_link_register(struct rtnl_link_ops *ops)
{
return rtnl_link_register(ops);
}
static int ipvlan_device_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
struct ipvl_dev *ipvlan, *next;
struct ipvl_port *port;
LIST_HEAD(lst_kill);
if (!netif_is_ipvlan_port(dev))
return NOTIFY_DONE;
port = ipvlan_port_get_rtnl(dev);
switch (event) {
case NETDEV_CHANGE:
list_for_each_entry(ipvlan, &port->ipvlans, pnode)
netif_stacked_transfer_operstate(ipvlan->phy_dev,
ipvlan->dev);
break;
case NETDEV_UNREGISTER:
if (dev->reg_state != NETREG_UNREGISTERING)
break;
list_for_each_entry_safe(ipvlan, next, &port->ipvlans,
pnode)
ipvlan->dev->rtnl_link_ops->dellink(ipvlan->dev,
&lst_kill);
unregister_netdevice_many(&lst_kill);
break;
case NETDEV_FEAT_CHANGE:
list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
ipvlan->dev->features = dev->features & IPVLAN_FEATURES;
ipvlan->dev->gso_max_size = dev->gso_max_size;
netdev_features_change(ipvlan->dev);
}
break;
case NETDEV_CHANGEMTU:
list_for_each_entry(ipvlan, &port->ipvlans, pnode)
ipvlan_adjust_mtu(ipvlan, dev);
break;
case NETDEV_PRE_TYPE_CHANGE:
/* Forbid underlying device to change its type. */
return NOTIFY_BAD;
}
return NOTIFY_DONE;
}
static int ipvlan_add_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr)
{
struct ipvl_addr *addr;
if (ipvlan_addr_busy(ipvlan->port, ip6_addr, true)) {
netif_err(ipvlan, ifup, ipvlan->dev,
"Failed to add IPv6=%pI6c addr for %s intf\n",
ip6_addr, ipvlan->dev->name);
return -EINVAL;
}
addr = kzalloc(sizeof(struct ipvl_addr), GFP_ATOMIC);
if (!addr)
return -ENOMEM;
addr->master = ipvlan;
memcpy(&addr->ip6addr, ip6_addr, sizeof(struct in6_addr));
addr->atype = IPVL_IPV6;
list_add_tail(&addr->anode, &ipvlan->addrs);
ipvlan->ipv6cnt++;
/* If the interface is not up, the address will be added to the hash
* list by ipvlan_open.
*/
if (netif_running(ipvlan->dev))
ipvlan_ht_addr_add(ipvlan, addr);
return 0;
}
static void ipvlan_del_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr)
{
struct ipvl_addr *addr;
addr = ipvlan_find_addr(ipvlan, ip6_addr, true);
if (!addr)
return;
ipvlan_ht_addr_del(addr, true);
list_del(&addr->anode);
ipvlan->ipv6cnt--;
WARN_ON(ipvlan->ipv6cnt < 0);
kfree_rcu(addr, rcu);
return;
}
static int ipvlan_addr6_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
struct inet6_ifaddr *if6 = (struct inet6_ifaddr *)ptr;
struct net_device *dev = (struct net_device *)if6->idev->dev;
struct ipvl_dev *ipvlan = netdev_priv(dev);
if (!netif_is_ipvlan(dev))
return NOTIFY_DONE;
if (!ipvlan || !ipvlan->port)
return NOTIFY_DONE;
switch (event) {
case NETDEV_UP:
if (ipvlan_add_addr6(ipvlan, &if6->addr))
return NOTIFY_BAD;
break;
case NETDEV_DOWN:
ipvlan_del_addr6(ipvlan, &if6->addr);
break;
}
return NOTIFY_OK;
}
static int ipvlan_add_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr)
{
struct ipvl_addr *addr;
if (ipvlan_addr_busy(ipvlan->port, ip4_addr, false)) {
netif_err(ipvlan, ifup, ipvlan->dev,
"Failed to add IPv4=%pI4 on %s intf.\n",
ip4_addr, ipvlan->dev->name);
return -EINVAL;
}
addr = kzalloc(sizeof(struct ipvl_addr), GFP_KERNEL);
if (!addr)
return -ENOMEM;
addr->master = ipvlan;
memcpy(&addr->ip4addr, ip4_addr, sizeof(struct in_addr));
addr->atype = IPVL_IPV4;
list_add_tail(&addr->anode, &ipvlan->addrs);
ipvlan->ipv4cnt++;
/* If the interface is not up, the address will be added to the hash
* list by ipvlan_open.
*/
if (netif_running(ipvlan->dev))
ipvlan_ht_addr_add(ipvlan, addr);
ipvlan_set_broadcast_mac_filter(ipvlan, true);
return 0;
}
static void ipvlan_del_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr)
{
struct ipvl_addr *addr;
addr = ipvlan_find_addr(ipvlan, ip4_addr, false);
if (!addr)
return;
ipvlan_ht_addr_del(addr, true);
list_del(&addr->anode);
ipvlan->ipv4cnt--;
WARN_ON(ipvlan->ipv4cnt < 0);
if (!ipvlan->ipv4cnt)
ipvlan_set_broadcast_mac_filter(ipvlan, false);
kfree_rcu(addr, rcu);
return;
}
static int ipvlan_addr4_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
struct in_ifaddr *if4 = (struct in_ifaddr *)ptr;
struct net_device *dev = (struct net_device *)if4->ifa_dev->dev;
struct ipvl_dev *ipvlan = netdev_priv(dev);
struct in_addr ip4_addr;
if (!netif_is_ipvlan(dev))
return NOTIFY_DONE;
if (!ipvlan || !ipvlan->port)
return NOTIFY_DONE;
switch (event) {
case NETDEV_UP:
ip4_addr.s_addr = if4->ifa_address;
if (ipvlan_add_addr4(ipvlan, &ip4_addr))
return NOTIFY_BAD;
break;
case NETDEV_DOWN:
ip4_addr.s_addr = if4->ifa_address;
ipvlan_del_addr4(ipvlan, &ip4_addr);
break;
}
return NOTIFY_OK;
}
static struct notifier_block ipvlan_addr4_notifier_block __read_mostly = {
.notifier_call = ipvlan_addr4_event,
};
static struct notifier_block ipvlan_notifier_block __read_mostly = {
.notifier_call = ipvlan_device_event,
};
static struct notifier_block ipvlan_addr6_notifier_block __read_mostly = {
.notifier_call = ipvlan_addr6_event,
};
static int __init ipvlan_init_module(void)
{
int err;
ipvlan_init_secret();
register_netdevice_notifier(&ipvlan_notifier_block);
register_inet6addr_notifier(&ipvlan_addr6_notifier_block);
register_inetaddr_notifier(&ipvlan_addr4_notifier_block);
err = ipvlan_link_register(&ipvlan_link_ops);
if (err < 0)
goto error;
return 0;
error:
unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block);
unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block);
unregister_netdevice_notifier(&ipvlan_notifier_block);
return err;
}
static void __exit ipvlan_cleanup_module(void)
{
rtnl_link_unregister(&ipvlan_link_ops);
unregister_netdevice_notifier(&ipvlan_notifier_block);
unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block);
unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block);
}
module_init(ipvlan_init_module);
module_exit(ipvlan_cleanup_module);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Mahesh Bandewar <maheshb@google.com>");
MODULE_DESCRIPTION("Driver for L3 (IPv6/IPv4) based VLANs");
MODULE_ALIAS_RTNL_LINK("ipvlan");