diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 5763503fe4e640a5041788fb360fadd51007a3c3..823bc2fd201ff022f28f08800694fab19ae3c9e8 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -166,6 +166,19 @@ config IPVLAN
To compile this driver as a module, choose M here: the module
will be called ipvlan.
+config IPVTAP
+ tristate "IP-VLAN based tap driver"
+ depends on IPVLAN
+ depends on INET
+ select TAP
+ ---help---
+ This adds a specialized tap character device driver that is based
+ on the IP-VLAN network interface, called ipvtap. An ipvtap device
+ can be added in the same way as a ipvlan device, using 'type
+ ipvtap', and then be accessed through the tap user space interface.
+
+ To compile this driver as a module, choose M here: the module
+ will be called ipvtap.
config VXLAN
tristate "Virtual eXtensible Local Area Network (VXLAN)"
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index 7dd86ca02d0d4c48f53f0e7846bae0a366748f51..98ed4d96987c87fda074a219a234cbf8e48f2b9a 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -7,6 +7,7 @@
#
obj-$(CONFIG_BONDING) += bonding/
obj-$(CONFIG_IPVLAN) += ipvlan/
+obj-$(CONFIG_IPVTAP) += ipvlan/
obj-$(CONFIG_DUMMY) += dummy.o
obj-$(CONFIG_EQUALIZER) += eql.o
obj-$(CONFIG_IFB) += ifb.o
diff --git a/drivers/net/ipvlan/Makefile b/drivers/net/ipvlan/Makefile
index df79910192d6c92b489c6c71f2f5fbdc795a7782..8a2c64dc964105d378b56be5a99477599e011b57 100644
--- a/drivers/net/ipvlan/Makefile
+++ b/drivers/net/ipvlan/Makefile
@@ -3,5 +3,6 @@
#
obj-$(CONFIG_IPVLAN) += ipvlan.o
+obj-$(CONFIG_IPVTAP) += ipvtap.o
ipvlan-objs := ipvlan_core.o ipvlan_main.o
diff --git a/drivers/net/ipvlan/ipvlan.h b/drivers/net/ipvlan/ipvlan.h
index 406ae4ff0ae891aa6bd1522bbb367699f16109b1..800a46c8d26c25f74244ee30872097982ebc775e 100644
--- a/drivers/net/ipvlan/ipvlan.h
+++ b/drivers/net/ipvlan/ipvlan.h
@@ -135,4 +135,11 @@ struct sk_buff *ipvlan_l3_rcv(struct net_device *dev, struct sk_buff *skb,
u16 proto);
unsigned int ipvlan_nf_input(void *priv, struct sk_buff *skb,
const struct nf_hook_state *state);
+void ipvlan_count_rx(const struct ipvl_dev *ipvlan,
+ unsigned int len, bool success, bool mcast);
+int ipvlan_link_new(struct net *src_net, struct net_device *dev,
+ struct nlattr *tb[], struct nlattr *data[]);
+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);
#endif /* __IPVLAN_H */
diff --git a/drivers/net/ipvlan/ipvlan_core.c b/drivers/net/ipvlan/ipvlan_core.c
index 8ae335d73d3886a0f7a91f55a428059120288de6..1f3295e274d0f5fbb36211b71023320327a86f12 100644
--- a/drivers/net/ipvlan/ipvlan_core.c
+++ b/drivers/net/ipvlan/ipvlan_core.c
@@ -16,7 +16,7 @@ void ipvlan_init_secret(void)
net_get_random_once(&ipvlan_jhash_secret, sizeof(ipvlan_jhash_secret));
}
-static void ipvlan_count_rx(const struct ipvl_dev *ipvlan,
+void ipvlan_count_rx(const struct ipvl_dev *ipvlan,
unsigned int len, bool success, bool mcast)
{
if (likely(success)) {
@@ -33,6 +33,7 @@ static void ipvlan_count_rx(const struct ipvl_dev *ipvlan,
this_cpu_inc(ipvlan->pcpu_stats->rx_errs);
}
}
+EXPORT_SYMBOL_GPL(ipvlan_count_rx);
static u8 ipvlan_get_v6_hash(const void *iaddr)
{
diff --git a/drivers/net/ipvlan/ipvlan_main.c b/drivers/net/ipvlan/ipvlan_main.c
index 95b18f4602cf1d9653fd740c56f8644d764189a4..aa8575ccbce392426ab1ceb65ecadee5175dcb1b 100644
--- a/drivers/net/ipvlan/ipvlan_main.c
+++ b/drivers/net/ipvlan/ipvlan_main.c
@@ -496,8 +496,8 @@ static int ipvlan_nl_fillinfo(struct sk_buff *skb,
return ret;
}
-static int ipvlan_link_new(struct net *src_net, struct net_device *dev,
- struct nlattr *tb[], struct nlattr *data[])
+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;
@@ -594,8 +594,9 @@ static int ipvlan_link_new(struct net *src_net, struct net_device *dev,
ipvlan_port_destroy(phy_dev);
return err;
}
+EXPORT_SYMBOL_GPL(ipvlan_link_new);
-static void ipvlan_link_delete(struct net_device *dev, struct list_head *head)
+void ipvlan_link_delete(struct net_device *dev, struct list_head *head)
{
struct ipvl_dev *ipvlan = netdev_priv(dev);
struct ipvl_addr *addr, *next;
@@ -611,8 +612,9 @@ static void ipvlan_link_delete(struct net_device *dev, struct list_head *head)
unregister_netdevice_queue(dev, head);
netdev_upper_dev_unlink(ipvlan->phy_dev, dev);
}
+EXPORT_SYMBOL_GPL(ipvlan_link_delete);
-static void ipvlan_link_setup(struct net_device *dev)
+void ipvlan_link_setup(struct net_device *dev)
{
ether_setup(dev);
@@ -623,6 +625,7 @@ static void ipvlan_link_setup(struct net_device *dev)
dev->header_ops = &ipvlan_header_ops;
dev->ethtool_ops = &ipvlan_ethtool_ops;
}
+EXPORT_SYMBOL_GPL(ipvlan_link_setup);
static const struct nla_policy ipvlan_nl_policy[IFLA_IPVLAN_MAX + 1] =
{
@@ -633,22 +636,22 @@ 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)
+int ipvlan_link_register(struct rtnl_link_ops *ops)
{
+ ops->get_size = ipvlan_nl_getsize;
+ ops->policy = ipvlan_nl_policy;
+ ops->validate = ipvlan_nl_validate;
+ ops->fill_info = ipvlan_nl_fillinfo;
+ ops->changelink = ipvlan_nl_changelink;
+ ops->maxtype = IFLA_IPVLAN_MAX;
return rtnl_link_register(ops);
}
+EXPORT_SYMBOL_GPL(ipvlan_link_register);
static int ipvlan_device_event(struct notifier_block *unused,
unsigned long event, void *ptr)
diff --git a/drivers/net/ipvlan/ipvtap.c b/drivers/net/ipvlan/ipvtap.c
new file mode 100644
index 0000000000000000000000000000000000000000..2b713b63b62c2d3edfce1128ffd417444f566c51
--- /dev/null
+++ b/drivers/net/ipvlan/ipvtap.c
@@ -0,0 +1,241 @@
+#include <linux/etherdevice.h>
+#include "ipvlan.h"
+#include <linux/if_vlan.h>
+#include <linux/if_tap.h>
+#include <linux/interrupt.h>
+#include <linux/nsproxy.h>
+#include <linux/compat.h>
+#include <linux/if_tun.h>
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/cache.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/wait.h>
+#include <linux/cdev.h>
+#include <linux/idr.h>
+#include <linux/fs.h>
+#include <linux/uio.h>
+
+#include <net/net_namespace.h>
+#include <net/rtnetlink.h>
+#include <net/sock.h>
+#include <linux/virtio_net.h>
+
+#define TUN_OFFLOADS (NETIF_F_HW_CSUM | NETIF_F_TSO_ECN | NETIF_F_TSO | \
+ NETIF_F_TSO6 | NETIF_F_UFO)
+
+static dev_t ipvtap_major;
+static struct cdev ipvtap_cdev;
+
+static const void *ipvtap_net_namespace(struct device *d)
+{
+ struct net_device *dev = to_net_dev(d->parent);
+ return dev_net(dev);
+}
+
+static struct class ipvtap_class = {
+ .name = "ipvtap",
+ .owner = THIS_MODULE,
+ .ns_type = &net_ns_type_operations,
+ .namespace = ipvtap_net_namespace,
+};
+
+struct ipvtap_dev {
+ struct ipvl_dev vlan;
+ struct tap_dev tap;
+};
+
+static void ipvtap_count_tx_dropped(struct tap_dev *tap)
+{
+ struct ipvtap_dev *vlantap = container_of(tap, struct ipvtap_dev, tap);
+ struct ipvl_dev *vlan = &vlantap->vlan;
+
+ this_cpu_inc(vlan->pcpu_stats->tx_drps);
+}
+
+static void ipvtap_count_rx_dropped(struct tap_dev *tap)
+{
+ struct ipvtap_dev *vlantap = container_of(tap, struct ipvtap_dev, tap);
+ struct ipvl_dev *vlan = &vlantap->vlan;
+
+ ipvlan_count_rx(vlan, 0, 0, 0);
+}
+
+static void ipvtap_update_features(struct tap_dev *tap,
+ netdev_features_t features)
+{
+ struct ipvtap_dev *vlantap = container_of(tap, struct ipvtap_dev, tap);
+ struct ipvl_dev *vlan = &vlantap->vlan;
+
+ vlan->sfeatures = features;
+ netdev_update_features(vlan->dev);
+}
+
+static int ipvtap_newlink(struct net *src_net,
+ struct net_device *dev,
+ struct nlattr *tb[],
+ struct nlattr *data[])
+{
+ struct ipvtap_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;
+ vlantap->tap.count_tx_dropped = ipvtap_count_tx_dropped;
+ vlantap->tap.update_features = ipvtap_update_features;
+ vlantap->tap.count_rx_dropped = ipvtap_count_rx_dropped;
+
+ 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 = ipvlan_link_new(src_net, dev, tb, data);
+ if (err) {
+ netdev_rx_handler_unregister(dev);
+ return err;
+ }
+
+ vlantap->tap.dev = vlantap->vlan.dev;
+
+ return err;
+}
+
+static void ipvtap_dellink(struct net_device *dev,
+ struct list_head *head)
+{
+ struct ipvtap_dev *vlan = netdev_priv(dev);
+
+ netdev_rx_handler_unregister(dev);
+ tap_del_queues(&vlan->tap);
+ ipvlan_link_delete(dev, head);
+}
+
+static void ipvtap_setup(struct net_device *dev)
+{
+ ipvlan_link_setup(dev);
+ dev->tx_queue_len = TUN_READQ_SIZE;
+ dev->priv_flags &= ~IFF_NO_QUEUE;
+}
+
+static struct rtnl_link_ops ipvtap_link_ops __read_mostly = {
+ .kind = "ipvtap",
+ .setup = ipvtap_setup,
+ .newlink = ipvtap_newlink,
+ .dellink = ipvtap_dellink,
+ .priv_size = sizeof(struct ipvtap_dev),
+};
+
+static int ipvtap_device_event(struct notifier_block *unused,
+ unsigned long event, void *ptr)
+{
+ struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+ struct ipvtap_dev *vlantap;
+ struct device *classdev;
+ dev_t devt;
+ int err;
+ char tap_name[IFNAMSIZ];
+
+ if (dev->rtnl_link_ops != &ipvtap_link_ops)
+ return NOTIFY_DONE;
+
+ snprintf(tap_name, IFNAMSIZ, "tap%d", dev->ifindex);
+ vlantap = netdev_priv(dev);
+
+ switch (event) {
+ case NETDEV_REGISTER:
+ /* Create the device node here after the network device has
+ * been registered but before register_netdevice has
+ * finished running.
+ */
+ err = tap_get_minor(ipvtap_major, &vlantap->tap);
+ if (err)
+ return notifier_from_errno(err);
+
+ devt = MKDEV(MAJOR(ipvtap_major), vlantap->tap.minor);
+ classdev = device_create(&ipvtap_class, &dev->dev, devt,
+ dev, tap_name);
+ if (IS_ERR(classdev)) {
+ tap_free_minor(ipvtap_major, &vlantap->tap);
+ return notifier_from_errno(PTR_ERR(classdev));
+ }
+ err = sysfs_create_link(&dev->dev.kobj, &classdev->kobj,
+ tap_name);
+ if (err)
+ return notifier_from_errno(err);
+ break;
+ case NETDEV_UNREGISTER:
+ /* vlan->minor == 0 if NETDEV_REGISTER above failed */
+ if (vlantap->tap.minor == 0)
+ break;
+ sysfs_remove_link(&dev->dev.kobj, tap_name);
+ devt = MKDEV(MAJOR(ipvtap_major), vlantap->tap.minor);
+ device_destroy(&ipvtap_class, devt);
+ tap_free_minor(ipvtap_major, &vlantap->tap);
+ break;
+ case NETDEV_CHANGE_TX_QUEUE_LEN:
+ if (tap_queue_resize(&vlantap->tap))
+ return NOTIFY_BAD;
+ break;
+ }
+
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block ipvtap_notifier_block __read_mostly = {
+ .notifier_call = ipvtap_device_event,
+};
+
+static int ipvtap_init(void)
+{
+ int err;
+
+ err = tap_create_cdev(&ipvtap_cdev, &ipvtap_major, "ipvtap");
+
+ if (err)
+ goto out1;
+
+ err = class_register(&ipvtap_class);
+ if (err)
+ goto out2;
+
+ err = register_netdevice_notifier(&ipvtap_notifier_block);
+ if (err)
+ goto out3;
+
+ err = ipvlan_link_register(&ipvtap_link_ops);
+ if (err)
+ goto out4;
+
+ return 0;
+
+out4:
+ unregister_netdevice_notifier(&ipvtap_notifier_block);
+out3:
+ class_unregister(&ipvtap_class);
+out2:
+ tap_destroy_cdev(ipvtap_major, &ipvtap_cdev);
+out1:
+ return err;
+}
+module_init(ipvtap_init);
+
+static void ipvtap_exit(void)
+{
+ rtnl_link_unregister(&ipvtap_link_ops);
+ unregister_netdevice_notifier(&ipvtap_notifier_block);
+ class_unregister(&ipvtap_class);
+ tap_destroy_cdev(ipvtap_major, &ipvtap_cdev);
+}
+module_exit(ipvtap_exit);
+MODULE_ALIAS_RTNL_LINK("ipvtap");
+MODULE_AUTHOR("Sainath Grandhi <sainath.grandhi@intel.com>");
+MODULE_LICENSE("GPL");