diff options
Diffstat (limited to 'drivers/net/ipvlan/ipvlan_main.c')
| -rw-r--r-- | drivers/net/ipvlan/ipvlan_main.c | 118 |
1 files changed, 74 insertions, 44 deletions
diff --git a/drivers/net/ipvlan/ipvlan_main.c b/drivers/net/ipvlan/ipvlan_main.c index 2469df118fbf..450eec264a5e 100644 --- a/drivers/net/ipvlan/ipvlan_main.c +++ b/drivers/net/ipvlan/ipvlan_main.c @@ -22,12 +22,14 @@ static const struct nf_hook_ops ipvl_nfops[] = { .hooknum = NF_INET_LOCAL_IN, .priority = INT_MAX, }, +#if IS_ENABLED(CONFIG_IPV6) { .hook = ipvlan_nf_input, .pf = NFPROTO_IPV6, .hooknum = NF_INET_LOCAL_IN, .priority = INT_MAX, }, +#endif }; static const struct l3mdev_ops ipvl_l3mdev_ops = { @@ -127,7 +129,6 @@ static int ipvlan_port_create(struct net_device *dev) if (err) goto err; - dev->priv_flags |= IFF_IPVLAN_MASTER; return 0; err: @@ -140,7 +141,6 @@ static void ipvlan_port_destroy(struct net_device *dev) struct ipvl_port *port = ipvlan_port_get_rtnl(dev); struct sk_buff *skb; - dev->priv_flags &= ~IFF_IPVLAN_MASTER; if (port->mode == IPVLAN_MODE_L3S) { dev->priv_flags &= ~IFF_L3MDEV_MASTER; ipvlan_unregister_nf_hook(dev_net(dev)); @@ -176,7 +176,7 @@ static int ipvlan_init(struct net_device *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->features |= NETIF_F_LLTX | NETIF_F_VLAN_CHALLENGED; dev->gso_max_size = phy_dev->gso_max_size; dev->gso_max_segs = phy_dev->gso_max_segs; dev->hard_header_len = phy_dev->hard_header_len; @@ -225,8 +225,10 @@ static int ipvlan_open(struct net_device *dev) else dev->flags &= ~IFF_NOARP; - list_for_each_entry(addr, &ipvlan->addrs, anode) + rcu_read_lock(); + list_for_each_entry_rcu(addr, &ipvlan->addrs, anode) ipvlan_ht_addr_add(ipvlan, addr); + rcu_read_unlock(); return dev_uc_add(phy_dev, phy_dev->dev_addr); } @@ -242,8 +244,10 @@ static int ipvlan_stop(struct net_device *dev) dev_uc_del(phy_dev, phy_dev->dev_addr); - list_for_each_entry(addr, &ipvlan->addrs, anode) + rcu_read_lock(); + list_for_each_entry_rcu(addr, &ipvlan->addrs, anode) ipvlan_ht_addr_del(addr); + rcu_read_unlock(); return 0; } @@ -417,6 +421,12 @@ static const struct header_ops ipvlan_header_ops = { .cache_update = eth_header_cache_update, }; +static bool netif_is_ipvlan(const struct net_device *dev) +{ + /* both ipvlan and ipvtap devices use the same netdev_ops */ + return dev->netdev_ops == &ipvlan_netdev_ops; +} + static int ipvlan_ethtool_get_link_ksettings(struct net_device *dev, struct ethtool_link_ksettings *cmd) { @@ -586,6 +596,7 @@ int ipvlan_link_new(struct net *src_net, struct net_device *dev, ipvlan->sfeatures = IPVLAN_FEATURES; ipvlan_adjust_mtu(ipvlan, phy_dev); INIT_LIST_HEAD(&ipvlan->addrs); + spin_lock_init(&ipvlan->addrs_lock); /* TODO Probably put random address here to be presented to the * world but keep using the physical-dev address for the outgoing @@ -593,7 +604,7 @@ int ipvlan_link_new(struct net *src_net, struct net_device *dev, */ memcpy(dev->dev_addr, phy_dev->dev_addr, ETH_ALEN); - dev->priv_flags |= IFF_IPVLAN_SLAVE; + dev->priv_flags |= IFF_NO_RX_HANDLER; err = register_netdevice(dev); if (err < 0) @@ -663,11 +674,13 @@ void ipvlan_link_delete(struct net_device *dev, struct list_head *head) struct ipvl_dev *ipvlan = netdev_priv(dev); struct ipvl_addr *addr, *next; + spin_lock_bh(&ipvlan->addrs_lock); list_for_each_entry_safe(addr, next, &ipvlan->addrs, anode) { ipvlan_ht_addr_del(addr); - list_del(&addr->anode); + list_del_rcu(&addr->anode); kfree_rcu(addr, rcu); } + spin_unlock_bh(&ipvlan->addrs_lock); ida_simple_remove(&ipvlan->port->ida, dev->dev_id); list_del_rcu(&ipvlan->pnode); @@ -758,8 +771,7 @@ static int ipvlan_device_event(struct notifier_block *unused, if (dev->reg_state != NETREG_UNREGISTERING) break; - list_for_each_entry_safe(ipvlan, next, &port->ipvlans, - pnode) + 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); @@ -791,6 +803,7 @@ static int ipvlan_device_event(struct notifier_block *unused, return NOTIFY_DONE; } +/* the caller must held the addrs lock */ static int ipvlan_add_addr(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6) { struct ipvl_addr *addr; @@ -800,14 +813,17 @@ static int ipvlan_add_addr(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6) return -ENOMEM; addr->master = ipvlan; - if (is_v6) { - memcpy(&addr->ip6addr, iaddr, sizeof(struct in6_addr)); - addr->atype = IPVL_IPV6; - } else { + if (!is_v6) { memcpy(&addr->ip4addr, iaddr, sizeof(struct in_addr)); addr->atype = IPVL_IPV4; +#if IS_ENABLED(CONFIG_IPV6) + } else { + memcpy(&addr->ip6addr, iaddr, sizeof(struct in6_addr)); + addr->atype = IPVL_IPV6; +#endif } - list_add_tail(&addr->anode, &ipvlan->addrs); + + list_add_tail_rcu(&addr->anode, &ipvlan->addrs); /* If the interface is not up, the address will be added to the hash * list by ipvlan_open. @@ -822,32 +838,17 @@ static void ipvlan_del_addr(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6) { struct ipvl_addr *addr; + spin_lock_bh(&ipvlan->addrs_lock); addr = ipvlan_find_addr(ipvlan, iaddr, is_v6); - if (!addr) + if (!addr) { + spin_unlock_bh(&ipvlan->addrs_lock); return; + } ipvlan_ht_addr_del(addr); - list_del(&addr->anode); + list_del_rcu(&addr->anode); + spin_unlock_bh(&ipvlan->addrs_lock); kfree_rcu(addr, rcu); - - return; -} - -static int ipvlan_add_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_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; - } - - return ipvlan_add_addr(ipvlan, ip6_addr, true); -} - -static void ipvlan_del_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr) -{ - return ipvlan_del_addr(ipvlan, ip6_addr, true); } static bool ipvlan_is_valid_dev(const struct net_device *dev) @@ -863,6 +864,27 @@ static bool ipvlan_is_valid_dev(const struct net_device *dev) return true; } +#if IS_ENABLED(CONFIG_IPV6) +static int ipvlan_add_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr) +{ + int ret = -EINVAL; + + spin_lock_bh(&ipvlan->addrs_lock); + 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); + else + ret = ipvlan_add_addr(ipvlan, ip6_addr, true); + spin_unlock_bh(&ipvlan->addrs_lock); + return ret; +} + +static void ipvlan_del_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr) +{ + return ipvlan_del_addr(ipvlan, ip6_addr, true); +} + static int ipvlan_addr6_event(struct notifier_block *unused, unsigned long event, void *ptr) { @@ -894,10 +916,6 @@ static int ipvlan_addr6_validator_event(struct notifier_block *unused, struct net_device *dev = (struct net_device *)i6vi->i6vi_dev->dev; struct ipvl_dev *ipvlan = netdev_priv(dev); - /* FIXME IPv6 autoconf calls us from bh without RTNL */ - if (in_softirq()) - return NOTIFY_DONE; - if (!ipvlan_is_valid_dev(dev)) return NOTIFY_DONE; @@ -913,17 +931,21 @@ static int ipvlan_addr6_validator_event(struct notifier_block *unused, return NOTIFY_OK; } +#endif static int ipvlan_add_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr) { - if (ipvlan_addr_busy(ipvlan->port, ip4_addr, false)) { + int ret = -EINVAL; + + spin_lock_bh(&ipvlan->addrs_lock); + 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; - } - - return ipvlan_add_addr(ipvlan, ip4_addr, false); + else + ret = ipvlan_add_addr(ipvlan, ip4_addr, false); + spin_unlock_bh(&ipvlan->addrs_lock); + return ret; } static void ipvlan_del_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr) @@ -993,6 +1015,7 @@ static struct notifier_block ipvlan_notifier_block __read_mostly = { .notifier_call = ipvlan_device_event, }; +#if IS_ENABLED(CONFIG_IPV6) static struct notifier_block ipvlan_addr6_notifier_block __read_mostly = { .notifier_call = ipvlan_addr6_event, }; @@ -1000,6 +1023,7 @@ static struct notifier_block ipvlan_addr6_notifier_block __read_mostly = { static struct notifier_block ipvlan_addr6_vtor_notifier_block __read_mostly = { .notifier_call = ipvlan_addr6_validator_event, }; +#endif static void ipvlan_ns_exit(struct net *net) { @@ -1024,9 +1048,11 @@ static int __init ipvlan_init_module(void) ipvlan_init_secret(); register_netdevice_notifier(&ipvlan_notifier_block); +#if IS_ENABLED(CONFIG_IPV6) register_inet6addr_notifier(&ipvlan_addr6_notifier_block); register_inet6addr_validator_notifier( &ipvlan_addr6_vtor_notifier_block); +#endif register_inetaddr_notifier(&ipvlan_addr4_notifier_block); register_inetaddr_validator_notifier(&ipvlan_addr4_vtor_notifier_block); @@ -1045,9 +1071,11 @@ error: unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block); unregister_inetaddr_validator_notifier( &ipvlan_addr4_vtor_notifier_block); +#if IS_ENABLED(CONFIG_IPV6) unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block); unregister_inet6addr_validator_notifier( &ipvlan_addr6_vtor_notifier_block); +#endif unregister_netdevice_notifier(&ipvlan_notifier_block); return err; } @@ -1060,9 +1088,11 @@ static void __exit ipvlan_cleanup_module(void) unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block); unregister_inetaddr_validator_notifier( &ipvlan_addr4_vtor_notifier_block); +#if IS_ENABLED(CONFIG_IPV6) unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block); unregister_inet6addr_validator_notifier( &ipvlan_addr6_vtor_notifier_block); +#endif } module_init(ipvlan_init_module); 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