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tap: tap as an independent module

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This patch makes tap a separate module for other types of virtual interfaces, for example,
ipvlan to use.

Signed-off-by: Sainath Grandhi <sainath.grandhi@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sainath Grandhi 2017-02-10 16:03:51 -08:00 committed by David S. Miller
parent d9f1f61c08
commit 9a393b5d59
6 changed files with 22 additions and 5 deletions
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7
drivers/net/Kconfig
View File

@ -135,6 +135,7 @@ config MACVTAP
tristate "MAC-VLAN based tap driver"
depends on MACVLAN
depends on INET
select TAP
help
This adds a specialized tap character device driver that is based
on the MAC-VLAN network interface, called macvtap. A macvtap device
@ -287,6 +288,12 @@ config TUN
If you don't know what to use this for, you don't need it.
config TAP
tristate
---help---
This option is selected by any driver implementing tap user space
interface for a virtual interface to re-use core tap functionality.
config TUN_VNET_CROSS_LE
bool "Support for cross-endian vnet headers on little-endian kernels"
default n

3
drivers/net/Makefile
View File

@ -21,6 +21,7 @@ obj-$(CONFIG_PHYLIB) += phy/
obj-$(CONFIG_RIONET) += rionet.o
obj-$(CONFIG_NET_TEAM) += team/
obj-$(CONFIG_TUN) += tun.o
obj-$(CONFIG_TAP) += tap.o
obj-$(CONFIG_VETH) += veth.o
obj-$(CONFIG_VIRTIO_NET) += virtio_net.o
obj-$(CONFIG_VXLAN) += vxlan.o
@ -29,8 +30,6 @@ obj-$(CONFIG_GTP) += gtp.o
obj-$(CONFIG_NLMON) += nlmon.o
obj-$(CONFIG_NET_VRF) += vrf.o
macvtap-objs := macvtap_main.o tap.o
#
# Networking Drivers
#

0
drivers/net/macvtap_main.c → drivers/net/macvtap.c
View File

11
drivers/net/tap.c
View File

@ -312,6 +312,7 @@ void tap_del_queues(struct tap_dev *tap)
/* guarantee that any future tap_set_queue will fail */
tap->numvtaps = MAX_TAP_QUEUES;
}
EXPORT_SYMBOL_GPL(tap_del_queues);
rx_handler_result_t tap_handle_frame(struct sk_buff **pskb)
{
@ -389,6 +390,7 @@ drop:
kfree_skb(skb);
return RX_HANDLER_CONSUMED;
}
EXPORT_SYMBOL_GPL(tap_handle_frame);
static struct major_info *tap_get_major(int major)
{
@ -428,6 +430,7 @@ unlock:
rcu_read_unlock();
return retval < 0 ? retval : 0;
}
EXPORT_SYMBOL_GPL(tap_get_minor);
void tap_free_minor(dev_t major, struct tap_dev *tap)
{
@ -449,6 +452,7 @@ void tap_free_minor(dev_t major, struct tap_dev *tap)
unlock:
rcu_read_unlock();
}
EXPORT_SYMBOL_GPL(tap_free_minor);
static struct tap_dev *dev_get_by_tap_file(int major, int minor)
{
@ -1210,6 +1214,7 @@ int tap_queue_resize(struct tap_dev *tap)
kfree(arrays);
return ret;
}
EXPORT_SYMBOL_GPL(tap_queue_resize);
static int tap_list_add(dev_t major, const char *device_name)
{
@ -1257,6 +1262,7 @@ out2:
out1:
return err;
}
EXPORT_SYMBOL_GPL(tap_create_cdev);
void tap_destroy_cdev(dev_t major, struct cdev *tap_cdev)
{
@ -1272,3 +1278,8 @@ void tap_destroy_cdev(dev_t major, struct cdev *tap_cdev)
}
}
}
EXPORT_SYMBOL_GPL(tap_destroy_cdev);
MODULE_AUTHOR("Arnd Bergmann <arnd@arndb.de>");
MODULE_AUTHOR("Sainath Grandhi <sainath.grandhi@intel.com>");
MODULE_LICENSE("GPL");

2
drivers/vhost/Kconfig
View File

@ -1,6 +1,6 @@
config VHOST_NET
tristate "Host kernel accelerator for virtio net"
depends on NET && EVENTFD && (TUN || !TUN) && (MACVTAP || !MACVTAP)
depends on NET && EVENTFD && (TUN || !TUN) && (TAP || !TAP)
select VHOST
---help---
This kernel module can be loaded in host kernel to accelerate

4
include/linux/if_tap.h
View File

@ -1,7 +1,7 @@
#ifndef _LINUX_IF_TAP_H_
#define _LINUX_IF_TAP_H_
#if IS_ENABLED(CONFIG_MACVTAP)
#if IS_ENABLED(CONFIG_TAP)
struct socket *tap_get_socket(struct file *);
#else
#include <linux/err.h>
@ -12,7 +12,7 @@ static inline struct socket *tap_get_socket(struct file *f)
{
return ERR_PTR(-EINVAL);
}
#endif /* CONFIG_MACVTAP */
#endif /* CONFIG_TAP */
#include <net/sock.h>
#include <linux/skb_array.h>