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linux/drivers/net/Kconfig
Sridhar Samudrala ba5e4426e8 virtio_net: Extend virtio to use VF datapath when available 
This patch enables virtio_net to switch over to a VF datapath when STANDBY
feature is enabled and a VF netdev is present with the same MAC address.
It allows live migration of a VM with a direct attached VF without the need
to setup a bond/team between a VF and virtio net device in the guest.

It uses the API that is exported by the net_failover driver to create and
and destroy a master failover netdev. When STANDBY feature is enabled, an
additional netdev(failover netdev) is created that acts as a master device
and tracks the state of the 2 lower netdevs. The original virtio_net netdev
is marked as 'standby' netdev and a passthru device with the same MAC is
registered as 'primary' netdev.

The hypervisor needs to unplug the VF device from the guest on the source
host and reset the MAC filter of the VF to initiate failover of datapath
to virtio before starting the migration. After the migration is completed,
the destination hypervisor sets the MAC filter on the VF and plugs it back
to the guest to switch over to VF datapath.

This patch is based on the discussion initiated by Jesse on this thread.
https://marc.info/?l=linux-virtualization&m=151189725224231&w=2

Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-28 22:59:54 -04:00

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#
# Network device configuration
#
menuconfig NETDEVICES
default y if UML
depends on NET
bool "Network device support"
---help---
You can say N here if you don't intend to connect your Linux box to
any other computer at all.
You'll have to say Y if your computer contains a network card that
you want to use under Linux. If you are going to run SLIP or PPP over
telephone line or null modem cable you need say Y here. Connecting
two machines with parallel ports using PLIP needs this, as well as
AX.25/KISS for sending Internet traffic over amateur radio links.
See also "The Linux Network Administrator's Guide" by Olaf Kirch and
Terry Dawson. Available at <http://www.tldp.org/guides.html>.
If unsure, say Y.
# All the following symbols are dependent on NETDEVICES - do not repeat
# that for each of the symbols.
if NETDEVICES
config MII
tristate
config NET_CORE
default y
bool "Network core driver support"
---help---
You can say N here if you do not intend to use any of the
networking core drivers (i.e. VLAN, bridging, bonding, etc.)
if NET_CORE
config BONDING
tristate "Bonding driver support"
depends on INET
depends on IPV6 || IPV6=n
---help---
Say 'Y' or 'M' if you wish to be able to 'bond' multiple Ethernet
Channels together. This is called 'Etherchannel' by Cisco,
'Trunking' by Sun, 802.3ad by the IEEE, and 'Bonding' in Linux.
The driver supports multiple bonding modes to allow for both high
performance and high availability operation.
Refer to <file:Documentation/networking/bonding.txt> for more
information.
To compile this driver as a module, choose M here: the module
will be called bonding.
config DUMMY
tristate "Dummy net driver support"
---help---
This is essentially a bit-bucket device (i.e. traffic you send to
this device is consigned into oblivion) with a configurable IP
address. It is most commonly used in order to make your currently
inactive SLIP address seem like a real address for local programs.
If you use SLIP or PPP, you might want to say Y here. It won't
enlarge your kernel. What a deal. Read about it in the Network
Administrator's Guide, available from
<http://www.tldp.org/docs.html#guide>.
To compile this driver as a module, choose M here: the module
will be called dummy.
config EQUALIZER
tristate "EQL (serial line load balancing) support"
---help---
If you have two serial connections to some other computer (this
usually requires two modems and two telephone lines) and you use
SLIP (the protocol for sending Internet traffic over telephone
lines) or PPP (a better SLIP) on them, you can make them behave like
one double speed connection using this driver. Naturally, this has
to be supported at the other end as well, either with a similar EQL
Linux driver or with a Livingston Portmaster 2e.
Say Y if you want this and read
<file:Documentation/networking/eql.txt>. You may also want to read
section 6.2 of the NET-3-HOWTO, available from
<http://www.tldp.org/docs.html#howto>.
To compile this driver as a module, choose M here: the module
will be called eql. If unsure, say N.
config NET_FC
bool "Fibre Channel driver support"
depends on SCSI && PCI
help
Fibre Channel is a high speed serial protocol mainly used to connect
large storage devices to the computer; it is compatible with and
intended to replace SCSI.
If you intend to use Fibre Channel, you need to have a Fibre channel
adaptor card in your computer; say Y here and to the driver for your
adaptor below. You also should have said Y to "SCSI support" and
"SCSI generic support".
config IFB
tristate "Intermediate Functional Block support"
depends on NET_CLS_ACT
---help---
This is an intermediate driver that allows sharing of
resources.
To compile this driver as a module, choose M here: the module
will be called ifb. If you want to use more than one ifb
device at a time, you need to compile this driver as a module.
Instead of 'ifb', the devices will then be called 'ifb0',
'ifb1' etc.
Look at the iproute2 documentation directory for usage etc
source "drivers/net/team/Kconfig"
config MACVLAN
tristate "MAC-VLAN support"
---help---
This allows one to create virtual interfaces that map packets to
or from specific MAC addresses to a particular interface.
Macvlan devices can be added using the "ip" command from the
iproute2 package starting with the iproute2-2.6.23 release:
"ip link add link <real dev> [ address MAC ] [ NAME ] type macvlan"
To compile this driver as a module, choose M here: the module
will be called macvlan.
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
can be added in the same way as a macvlan device, using 'type
macvtap', 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 macvtap.
config IPVLAN
tristate "IP-VLAN support"
depends on INET
depends on IPV6 || !IPV6
depends on NETFILTER
select NET_L3_MASTER_DEV
---help---
This allows one to create virtual devices off of a main interface
and packets will be delivered based on the dest L3 (IPv6/IPv4 addr)
on packets. All interfaces (including the main interface) share L2
making it transparent to the connected L2 switch.
Ipvlan devices can be added using the "ip" command from the
iproute2 package starting with the iproute2-3.19 release:
"ip link add link <main-dev> [ NAME ] type 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)"
depends on INET
select NET_UDP_TUNNEL
select GRO_CELLS
---help---
This allows one to create vxlan virtual interfaces that provide
Layer 2 Networks over Layer 3 Networks. VXLAN is often used
to tunnel virtual network infrastructure in virtualized environments.
For more information see:
http://tools.ietf.org/html/draft-mahalingam-dutt-dcops-vxlan-02
To compile this driver as a module, choose M here: the module
will be called vxlan.
config GENEVE
tristate "Generic Network Virtualization Encapsulation"
depends on INET && NET_UDP_TUNNEL
depends on IPV6 || !IPV6
select NET_IP_TUNNEL
select GRO_CELLS
---help---
This allows one to create geneve virtual interfaces that provide
Layer 2 Networks over Layer 3 Networks. GENEVE is often used
to tunnel virtual network infrastructure in virtualized environments.
For more information see:
http://tools.ietf.org/html/draft-gross-geneve-02
To compile this driver as a module, choose M here: the module
will be called geneve.
config GTP
tristate "GPRS Tunneling Protocol datapath (GTP-U)"
depends on INET && NET_UDP_TUNNEL
select NET_IP_TUNNEL
---help---
This allows one to create gtp virtual interfaces that provide
the GPRS Tunneling Protocol datapath (GTP-U). This tunneling protocol
is used to prevent subscribers from accessing mobile carrier core
network infrastructure. This driver requires a userspace software that
implements the signaling protocol (GTP-C) to update its PDP context
base, such as OpenGGSN <http://git.osmocom.org/openggsn/). This
tunneling protocol is implemented according to the GSM TS 09.60 and
3GPP TS 29.060 standards.
To compile this drivers as a module, choose M here: the module
wil be called gtp.
config MACSEC
tristate "IEEE 802.1AE MAC-level encryption (MACsec)"
select CRYPTO
select CRYPTO_AES
select CRYPTO_GCM
select GRO_CELLS
---help---
MACsec is an encryption standard for Ethernet.
config NETCONSOLE
tristate "Network console logging support"
---help---
If you want to log kernel messages over the network, enable this.
See <file:Documentation/networking/netconsole.txt> for details.
config NETCONSOLE_DYNAMIC
bool "Dynamic reconfiguration of logging targets"
depends on NETCONSOLE && SYSFS && CONFIGFS_FS && \
!(NETCONSOLE=y && CONFIGFS_FS=m)
help
This option enables the ability to dynamically reconfigure target
parameters (interface, IP addresses, port numbers, MAC addresses)
at runtime through a userspace interface exported using configfs.
See <file:Documentation/networking/netconsole.txt> for details.
config NETPOLL
def_bool NETCONSOLE
select SRCU
config NET_POLL_CONTROLLER
def_bool NETPOLL
config NTB_NETDEV
tristate "Virtual Ethernet over NTB Transport"
depends on NTB_TRANSPORT
config RIONET
tristate "RapidIO Ethernet over messaging driver support"
depends on RAPIDIO
config RIONET_TX_SIZE
int "Number of outbound queue entries"
depends on RIONET
default "128"
config RIONET_RX_SIZE
int "Number of inbound queue entries"
depends on RIONET
default "128"
config TUN
tristate "Universal TUN/TAP device driver support"
depends on INET
select CRC32
---help---
TUN/TAP provides packet reception and transmission for user space
programs. It can be viewed as a simple Point-to-Point or Ethernet
device, which instead of receiving packets from a physical media,
receives them from user space program and instead of sending packets
via physical media writes them to the user space program.
When a program opens /dev/net/tun, driver creates and registers
corresponding net device tunX or tapX. After a program closed above
devices, driver will automatically delete tunXX or tapXX device and
all routes corresponding to it.
Please read <file:Documentation/networking/tuntap.txt> for more
information.
To compile this driver as a module, choose M here: the module
will be called 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
---help---
This option allows TUN/TAP and MACVTAP device drivers in a
little-endian kernel to parse vnet headers that come from a
big-endian legacy virtio device.
Userspace programs can control the feature using the TUNSETVNETBE
and TUNGETVNETBE ioctls.
Unless you have a little-endian system hosting a big-endian virtual
machine with a legacy virtio NIC, you should say N.
config VETH
tristate "Virtual ethernet pair device"
---help---
This device is a local ethernet tunnel. Devices are created in pairs.
When one end receives the packet it appears on its pair and vice
versa.
config VIRTIO_NET
tristate "Virtio network driver"
depends on VIRTIO
select NET_FAILOVER
---help---
This is the virtual network driver for virtio. It can be used with
QEMU based VMMs (like KVM or Xen). Say Y or M.
config NLMON
tristate "Virtual netlink monitoring device"
---help---
This option enables a monitoring net device for netlink skbs. The
purpose of this is to analyze netlink messages with packet sockets.
Thus applications like tcpdump will be able to see local netlink
messages if they tap into the netlink device, record pcaps for further
diagnostics, etc. This is mostly intended for developers or support
to debug netlink issues. If unsure, say N.
config NET_VRF
tristate "Virtual Routing and Forwarding (Lite)"
depends on IP_MULTIPLE_TABLES
depends on NET_L3_MASTER_DEV
depends on IPV6 || IPV6=n
depends on IPV6_MULTIPLE_TABLES || IPV6=n
---help---
This option enables the support for mapping interfaces into VRF's. The
support enables VRF devices.
config VSOCKMON
tristate "Virtual vsock monitoring device"
depends on VHOST_VSOCK
---help---
This option enables a monitoring net device for vsock sockets. It is
mostly intended for developers or support to debug vsock issues. If
unsure, say N.
endif # NET_CORE
config SUNGEM_PHY
tristate
source "drivers/net/arcnet/Kconfig"
source "drivers/atm/Kconfig"
source "drivers/net/caif/Kconfig"
source "drivers/net/dsa/Kconfig"
source "drivers/net/ethernet/Kconfig"
source "drivers/net/fddi/Kconfig"
source "drivers/net/hippi/Kconfig"
config NET_SB1000
tristate "General Instruments Surfboard 1000"
depends on PNP
---help---
This is a driver for the General Instrument (also known as
NextLevel) SURFboard 1000 internal
cable modem. This is an ISA card which is used by a number of cable
TV companies to provide cable modem access. It's a one-way
downstream-only cable modem, meaning that your upstream net link is
provided by your regular phone modem.
At present this driver only compiles as a module, so say M here if
you have this card. The module will be called sb1000. Then read
<file:Documentation/networking/README.sb1000> for information on how
to use this module, as it needs special ppp scripts for establishing
a connection. Further documentation and the necessary scripts can be
found at:
<http://www.jacksonville.net/~fventuri/>
<http://home.adelphia.net/~siglercm/sb1000.html>
<http://linuxpower.cx/~cable/>
If you don't have this card, of course say N.
source "drivers/net/phy/Kconfig"
source "drivers/net/plip/Kconfig"
source "drivers/net/ppp/Kconfig"
source "drivers/net/slip/Kconfig"
source "drivers/s390/net/Kconfig"
source "drivers/net/usb/Kconfig"
source "drivers/net/wireless/Kconfig"
source "drivers/net/wimax/Kconfig"
source "drivers/net/wan/Kconfig"
source "drivers/net/ieee802154/Kconfig"
config XEN_NETDEV_FRONTEND
tristate "Xen network device frontend driver"
depends on XEN
select XEN_XENBUS_FRONTEND
default y
help
This driver provides support for Xen paravirtual network
devices exported by a Xen network driver domain (often
domain 0).
The corresponding Linux backend driver is enabled by the
CONFIG_XEN_NETDEV_BACKEND option.
If you are compiling a kernel for use as Xen guest, you
should say Y here. To compile this driver as a module, chose
M here: the module will be called xen-netfront.
config XEN_NETDEV_BACKEND
tristate "Xen backend network device"
depends on XEN_BACKEND
help
This driver allows the kernel to act as a Xen network driver
domain which exports paravirtual network devices to other
Xen domains. These devices can be accessed by any operating
system that implements a compatible front end.
The corresponding Linux frontend driver is enabled by the
CONFIG_XEN_NETDEV_FRONTEND configuration option.
The backend driver presents a standard network device
endpoint for each paravirtual network device to the driver
domain network stack. These can then be bridged or routed
etc in order to provide full network connectivity.
If you are compiling a kernel to run in a Xen network driver
domain (often this is domain 0) you should say Y here. To
compile this driver as a module, chose M here: the module
will be called xen-netback.
config VMXNET3
tristate "VMware VMXNET3 ethernet driver"
depends on PCI && INET
depends on !(PAGE_SIZE_64KB || ARM64_64K_PAGES || \
IA64_PAGE_SIZE_64KB || MICROBLAZE_64K_PAGES || \
PARISC_PAGE_SIZE_64KB || PPC_64K_PAGES)
help
This driver supports VMware's vmxnet3 virtual ethernet NIC.
To compile this driver as a module, choose M here: the
module will be called vmxnet3.
config FUJITSU_ES
tristate "FUJITSU Extended Socket Network Device driver"
depends on ACPI
help
This driver provides support for Extended Socket network device
on Extended Partitioning of FUJITSU PRIMEQUEST 2000 E2 series.
config THUNDERBOLT_NET
tristate "Networking over Thunderbolt cable"
depends on THUNDERBOLT && INET
help
Select this if you want to create network between two
computers over a Thunderbolt cable. The driver supports Apple
ThunderboltIP protocol and allows communication with any host
supporting the same protocol including Windows and macOS.
To compile this driver a module, choose M here. The module will be
called thunderbolt-net.
source "drivers/net/hyperv/Kconfig"
config NETDEVSIM
tristate "Simulated networking device"
depends on DEBUG_FS
depends on MAY_USE_DEVLINK
help
This driver is a developer testing tool and software model that can
be used to test various control path networking APIs, especially
HW-offload related.
To compile this driver as a module, choose M here: the module
will be called netdevsim.
config NET_FAILOVER
tristate "Failover driver"
select FAILOVER
help
This provides an automated failover mechanism via APIs to create
and destroy a failover master netdev and manages a primary and
standby slave netdevs that get registered via the generic failover
infrastructure. This can be used by paravirtual drivers to enable
an alternate low latency datapath. It alsoenables live migration of
a VM with direct attached VF by failing over to the paravirtual
datapath when the VF is unplugged.
endif # NETDEVICES
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