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-rw-r--r--drivers/net/ipvlan/ipvlan.h7
-rw-r--r--drivers/net/ipvlan/ipvlan_core.c103
-rw-r--r--drivers/net/ipvlan/ipvlan_main.c118
3 files changed, 155 insertions, 73 deletions
diff --git a/drivers/net/ipvlan/ipvlan.h b/drivers/net/ipvlan/ipvlan.h
index 5166575a164d..adb826f55e60 100644
--- a/drivers/net/ipvlan/ipvlan.h
+++ b/drivers/net/ipvlan/ipvlan.h
@@ -74,6 +74,7 @@ struct ipvl_dev {
DECLARE_BITMAP(mac_filters, IPVLAN_MAC_FILTER_SIZE);
netdev_features_t sfeatures;
u32 msg_enable;
+ spinlock_t addrs_lock;
};
struct ipvl_addr {
@@ -176,4 +177,10 @@ int ipvlan_link_new(struct net *src_net, struct net_device *dev,
void ipvlan_link_delete(struct net_device *dev, struct list_head *head);
void ipvlan_link_setup(struct net_device *dev);
int ipvlan_link_register(struct rtnl_link_ops *ops);
+
+static inline bool netif_is_ipvlan_port(const struct net_device *dev)
+{
+ return rcu_access_pointer(dev->rx_handler) == ipvlan_handle_frame;
+}
+
#endif /* __IPVLAN_H */
diff --git a/drivers/net/ipvlan/ipvlan_core.c b/drivers/net/ipvlan/ipvlan_core.c
index c1f008fe4e1d..1a8132eb2a3e 100644
--- a/drivers/net/ipvlan/ipvlan_core.c
+++ b/drivers/net/ipvlan/ipvlan_core.c
@@ -35,6 +35,7 @@ void ipvlan_count_rx(const struct ipvl_dev *ipvlan,
}
EXPORT_SYMBOL_GPL(ipvlan_count_rx);
+#if IS_ENABLED(CONFIG_IPV6)
static u8 ipvlan_get_v6_hash(const void *iaddr)
{
const struct in6_addr *ip6_addr = iaddr;
@@ -42,6 +43,12 @@ static u8 ipvlan_get_v6_hash(const void *iaddr)
return __ipv6_addr_jhash(ip6_addr, ipvlan_jhash_secret) &
IPVLAN_HASH_MASK;
}
+#else
+static u8 ipvlan_get_v6_hash(const void *iaddr)
+{
+ return 0;
+}
+#endif
static u8 ipvlan_get_v4_hash(const void *iaddr)
{
@@ -51,6 +58,23 @@ static u8 ipvlan_get_v4_hash(const void *iaddr)
IPVLAN_HASH_MASK;
}
+static bool addr_equal(bool is_v6, struct ipvl_addr *addr, const void *iaddr)
+{
+ if (!is_v6 && addr->atype == IPVL_IPV4) {
+ struct in_addr *i4addr = (struct in_addr *)iaddr;
+
+ return addr->ip4addr.s_addr == i4addr->s_addr;
+#if IS_ENABLED(CONFIG_IPV6)
+ } else if (is_v6 && addr->atype == IPVL_IPV6) {
+ struct in6_addr *i6addr = (struct in6_addr *)iaddr;
+
+ return ipv6_addr_equal(&addr->ip6addr, i6addr);
+#endif
+ }
+
+ return false;
+}
+
static struct ipvl_addr *ipvlan_ht_addr_lookup(const struct ipvl_port *port,
const void *iaddr, bool is_v6)
{
@@ -59,15 +83,9 @@ static struct ipvl_addr *ipvlan_ht_addr_lookup(const struct ipvl_port *port,
hash = is_v6 ? ipvlan_get_v6_hash(iaddr) :
ipvlan_get_v4_hash(iaddr);
- hlist_for_each_entry_rcu(addr, &port->hlhead[hash], hlnode) {
- if (is_v6 && addr->atype == IPVL_IPV6 &&
- ipv6_addr_equal(&addr->ip6addr, iaddr))
- return addr;
- else if (!is_v6 && addr->atype == IPVL_IPV4 &&
- addr->ip4addr.s_addr ==
- ((struct in_addr *)iaddr)->s_addr)
+ hlist_for_each_entry_rcu(addr, &port->hlhead[hash], hlnode)
+ if (addr_equal(is_v6, addr, iaddr))
return addr;
- }
return NULL;
}
@@ -91,29 +109,33 @@ void ipvlan_ht_addr_del(struct ipvl_addr *addr)
struct ipvl_addr *ipvlan_find_addr(const struct ipvl_dev *ipvlan,
const void *iaddr, bool is_v6)
{
- struct ipvl_addr *addr;
+ struct ipvl_addr *addr, *ret = NULL;
- list_for_each_entry(addr, &ipvlan->addrs, anode) {
- if ((is_v6 && addr->atype == IPVL_IPV6 &&
- ipv6_addr_equal(&addr->ip6addr, iaddr)) ||
- (!is_v6 && addr->atype == IPVL_IPV4 &&
- addr->ip4addr.s_addr == ((struct in_addr *)iaddr)->s_addr))
- return addr;
+ rcu_read_lock();
+ list_for_each_entry_rcu(addr, &ipvlan->addrs, anode) {
+ if (addr_equal(is_v6, addr, iaddr)) {
+ ret = addr;
+ break;
+ }
}
- return NULL;
+ rcu_read_unlock();
+ return ret;
}
bool ipvlan_addr_busy(struct ipvl_port *port, void *iaddr, bool is_v6)
{
struct ipvl_dev *ipvlan;
+ bool ret = false;
- ASSERT_RTNL();
-
- list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
- if (ipvlan_find_addr(ipvlan, iaddr, is_v6))
- return true;
+ rcu_read_lock();
+ list_for_each_entry_rcu(ipvlan, &port->ipvlans, pnode) {
+ if (ipvlan_find_addr(ipvlan, iaddr, is_v6)) {
+ ret = true;
+ break;
+ }
}
- return false;
+ rcu_read_unlock();
+ return ret;
}
static void *ipvlan_get_L3_hdr(struct ipvl_port *port, struct sk_buff *skb, int *type)
@@ -150,6 +172,7 @@ static void *ipvlan_get_L3_hdr(struct ipvl_port *port, struct sk_buff *skb, int
lyr3h = ip4h;
break;
}
+#if IS_ENABLED(CONFIG_IPV6)
case htons(ETH_P_IPV6): {
struct ipv6hdr *ip6h;
@@ -188,6 +211,7 @@ static void *ipvlan_get_L3_hdr(struct ipvl_port *port, struct sk_buff *skb, int
}
break;
}
+#endif
default:
return NULL;
}
@@ -337,14 +361,18 @@ static struct ipvl_addr *ipvlan_addr_lookup(struct ipvl_port *port,
{
struct ipvl_addr *addr = NULL;
- if (addr_type == IPVL_IPV6) {
+ switch (addr_type) {
+#if IS_ENABLED(CONFIG_IPV6)
+ case IPVL_IPV6: {
struct ipv6hdr *ip6h;
struct in6_addr *i6addr;
ip6h = (struct ipv6hdr *)lyr3h;
i6addr = use_dest ? &ip6h->daddr : &ip6h->saddr;
addr = ipvlan_ht_addr_lookup(port, i6addr, true);
- } else if (addr_type == IPVL_ICMPV6) {
+ break;
+ }
+ case IPVL_ICMPV6: {
struct nd_msg *ndmh;
struct in6_addr *i6addr;
@@ -356,14 +384,19 @@ static struct ipvl_addr *ipvlan_addr_lookup(struct ipvl_port *port,
i6addr = &ndmh->target;
addr = ipvlan_ht_addr_lookup(port, i6addr, true);
}
- } else if (addr_type == IPVL_IPV4) {
+ break;
+ }
+#endif
+ case IPVL_IPV4: {
struct iphdr *ip4h;
__be32 *i4addr;
ip4h = (struct iphdr *)lyr3h;
i4addr = use_dest ? &ip4h->daddr : &ip4h->saddr;
addr = ipvlan_ht_addr_lookup(port, i4addr, false);
- } else if (addr_type == IPVL_ARP) {
+ break;
+ }
+ case IPVL_ARP: {
struct arphdr *arph;
unsigned char *arp_ptr;
__be32 dip;
@@ -377,6 +410,8 @@ static struct ipvl_addr *ipvlan_addr_lookup(struct ipvl_port *port,
memcpy(&dip, arp_ptr, 4);
addr = ipvlan_ht_addr_lookup(port, &dip, false);
+ break;
+ }
}
return addr;
@@ -420,6 +455,7 @@ out:
return ret;
}
+#if IS_ENABLED(CONFIG_IPV6)
static int ipvlan_process_v6_outbound(struct sk_buff *skb)
{
const struct ipv6hdr *ip6h = ipv6_hdr(skb);
@@ -456,6 +492,12 @@ err:
out:
return ret;
}
+#else
+static int ipvlan_process_v6_outbound(struct sk_buff *skb)
+{
+ return NET_XMIT_DROP;
+}
+#endif
static int ipvlan_process_outbound(struct sk_buff *skb)
{
@@ -464,8 +506,8 @@ static int ipvlan_process_outbound(struct sk_buff *skb)
/* In this mode we dont care about multicast and broadcast traffic */
if (is_multicast_ether_addr(ethh->h_dest)) {
- pr_warn_ratelimited("Dropped {multi|broad}cast of type= [%x]\n",
- ntohs(skb->protocol));
+ pr_debug_ratelimited("Dropped {multi|broad}cast of type=[%x]\n",
+ ntohs(skb->protocol));
kfree_skb(skb);
goto out;
}
@@ -759,6 +801,7 @@ struct sk_buff *ipvlan_l3_rcv(struct net_device *dev, struct sk_buff *skb,
goto out;
break;
}
+#if IS_ENABLED(CONFIG_IPV6)
case AF_INET6:
{
struct dst_entry *dst;
@@ -774,10 +817,12 @@ struct sk_buff *ipvlan_l3_rcv(struct net_device *dev, struct sk_buff *skb,
};
skb_dst_drop(skb);
- dst = ip6_route_input_lookup(dev_net(sdev), sdev, &fl6, flags);
+ dst = ip6_route_input_lookup(dev_net(sdev), sdev, &fl6,
+ skb, flags);
skb_dst_set(skb, dst);
break;
}
+#endif
default:
break;
}
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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