kvmtool: Introduce downscript option for virtio-net

To detach tap device automatically from bridge when exiting,
just like what the reverse of "script" does.

Signed-off-by: Fan Du <fan.du@intel.com

kvmtool: Introduce downscript option for virtio-net

To detach tap device automatically from bridge when exiting,
just like what the reverse of "script" does.

Signed-off-by: Fan Du <fan.du@intel.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

show more ...

kvmtool: allow the TAP interface to be specified on the command line

In order to overcome the fact that a TAP interface can only be created
by root, allow the use of an interface that has already be

kvmtool: allow the TAP interface to be specified on the command line

In order to overcome the fact that a TAP interface can only be created
by root, allow the use of an interface that has already been created,
configured, made persistent and owned by a specific user/group (such
as done with tunctl).

In this case, any kind of configuration can be skipped (IP, up and
running mode), and the TAP is assumed to be ready for use.

This is done by introducing the "tapif" option, as used here:
--network trans=mmio,mode=tap,tapif=blah

where "blah" is a TAP interface.

This allow the creation/configuration of the interface to be controlled
by root, and lkvm to be run as a normal user.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

show more ...

kvm tools: make virtio-net mq max queues configurable

This patch makes the maximum amount of vqs configurable. To use it pass a 'mq'
option to network device configuration. For example:

vm run -n

kvm tools: make virtio-net mq max queues configurable

This patch makes the maximum amount of vqs configurable. To use it pass a 'mq'
option to network device configuration. For example:

vm run -n mode=tap,mq=4

Will allow up to 4 queue pairs for that network device.

Note that not specifiying mq, or setting mq=0 will disable virtio-net
multiqueuing.

Acked-by: Will Deacon <will.deacon@arm.com>
Tested-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

show more ...

kvm tools: virtio-net init/exit

Make the init/exit of virtio-net self-contained, so the global init code
won't need to check if it was selected or not.

This also moves the bulk of the net-specific

kvm tools: virtio-net init/exit

Make the init/exit of virtio-net self-contained, so the global init code
won't need to check if it was selected or not.

This also moves the bulk of the net-specific initialization code, including
the parser, into virtio-net itself.

Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

show more ...

kvm tools: Use enum for NET_MODE_{USER, TAP}

Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

kvm tools: Introduce trans=mmio parameter for virtio-net

To select virtio-mmio instead of virito-pci transport:

lkvm run --network trans=mmio

Signed-off-by: Asias He <asias.hejun@gmail.com>
Sig

kvm tools: Introduce trans=mmio parameter for virtio-net

To select virtio-mmio instead of virito-pci transport:

lkvm run --network trans=mmio

Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

show more ...

kvm tools: Allow the user to pass a FD to use as a TAP device

This allows users to pass a pre-configured fd to use for the network
interface.

For example:
kvm run -n mode=tap,fd=3 3<>/dev/n

kvm tools: Allow the user to pass a FD to use as a TAP device

This allows users to pass a pre-configured fd to use for the network
interface.

For example:
kvm run -n mode=tap,fd=3 3<>/dev/net/tap3

Acked-by: Daniel P. Berrange <berrange@redhat.com>
Cc: Osier Yang <jyang@redhat.com>
Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

show more ...

kvm tools: Add vhost-net support

This patch adds support to using the vhost-net device when using a tap backed
virtio-net device.

Activating vhost-net is done by appending a 'vhost=1' flag to the n

kvm tools: Add vhost-net support

This patch adds support to using the vhost-net device when using a tap backed
virtio-net device.

Activating vhost-net is done by appending a 'vhost=1' flag to the net device
configuration. For example:

'kvm run -n mode=tap,vhost=1'

This improves performance as follows:

Short version
------------------

TCP Throughput: +29%
UDP Throughput: +10%
TCP Latency: -15%
UDP Latency: -12%

Long version
------------------

MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to
192.168.33.4 (192.168.33.4) port 0 AF_INET
Recv Send Send
Socket Socket Message Elapsed
Size Size Size Time Throughput
bytes bytes bytes secs. 10^6bits/sec

87380 16384 16384 10.00 4895.04

MIGRATED UDP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to
192.168.33.4 (192.168.33.4) port 0 AF_INET
Socket Message Elapsed Messages
Size Size Time Okay Errors Throughput
bytes bytes secs # # 10^6bits/sec

229376 65507 10.00 125287 0 6565.60
229376 10.00 106910 5602.57

MIGRATED TCP REQUEST/RESPONSE TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET
to 192.168.33.4 (192.168.33.4) port 0 AF_INET : first burst 0
Local /Remote
Socket Size Request Resp. Elapsed Trans.
Send Recv Size Size Time Rate
bytes Bytes bytes bytes secs. per sec

16384 87380 1 1 10.00 14811.55

MIGRATED UDP REQUEST/RESPONSE TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET
to 192.168.33.4 (192.168.33.4) port 0 AF_INET : first burst 0
Local /Remote
Socket Size Request Resp. Elapsed Trans.
Send Recv Size Size Time Rate
bytes Bytes bytes bytes secs. per sec

229376 229376 1 1 10.00 16000.44
229376 229376

After:

MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to
192.168.33.4 (192.168.33.4) port 0 AF_INET
Recv Send Send
Socket Socket Message Elapsed
Size Size Size Time Throughput
bytes bytes bytes secs. 10^6bits/sec

87380 16384 16384 10.00 6340.74

MIGRATED UDP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to
192.168.33.4 (192.168.33.4) port 0 AF_INET
Socket Message Elapsed Messages
Size Size Time Okay Errors Throughput
bytes bytes secs # # 10^6bits/sec

229376 65507 10.00 131478 0 6890.09
229376 10.00 118136 6190.90

MIGRATED TCP REQUEST/RESPONSE TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET
to 192.168.33.4 (192.168.33.4) port 0 AF_INET : first burst 0
Local /Remote
Socket Size Request Resp. Elapsed Trans.
Send Recv Size Size Time Rate
bytes Bytes bytes bytes secs. per sec

16384 87380 1 1 10.00 17126.10

MIGRATED UDP REQUEST/RESPONSE TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET
to 192.168.33.4 (192.168.33.4) port 0 AF_INET : first burst 0
Local /Remote
Socket Size Request Resp. Elapsed Trans.
Send Recv Size Size Time Rate
bytes Bytes bytes bytes secs. per sec

229376 229376 1 1 10.00 17944.51
Cc: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

show more ...

kvm tools: Support multiple net devices

This patch adds support for multiple network devices. The command line syntax
changes to the following:

--network/-n [mode=tap/user/none][,guest_ip=ip][,hos

kvm tools: Support multiple net devices

This patch adds support for multiple network devices. The command line syntax
changes to the following:

--network/-n [mode=tap/user/none][,guest_ip=ip][,host_ip=
ip][,guest_mac=mac][,script=file]

Each of the parameters is optional, and the config defaults to a TAP based
networking with a sequential MAC.

Acked-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

show more ...

kvm tools: Introduce --host-mac option

The --host-mac option sets up MAC address of host.

Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

kvm tools: Introduce --guest-ip option

The --guest-ip option tells which IP address to give guest through DHCP.

Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@

kvm tools: Introduce --guest-ip option

The --guest-ip option tells which IP address to give guest through DHCP.

Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

show more ...

kvm tools: Add MACRO for user and tap mode for virtio net

This patch prepares the user and tap mode for virtio net.

Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penb

kvm tools: Add MACRO for user and tap mode for virtio net

This patch prepares the user and tap mode for virtio net.

Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

show more ...

kvm tools: Rename 'self' variables

Give proper names to vars named 'self'.

Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

kvm tools: Setup bridged network by a script

Use original hardcode network by default.

#./kvm run ... -n virtio --tapscript=./util/kvm-ifup-vbr0
# brctl show
bridge name bridge id

kvm tools: Setup bridged network by a script

Use original hardcode network by default.

#./kvm run ... -n virtio --tapscript=./util/kvm-ifup-vbr0
# brctl show
bridge name bridge id STP enabled interfaces
vbr0 8000.e272c7c391f4 no tap0
guest)# ifconfig eth6
eth6 Link encap:Ethernet HWaddr 00:11:22:33:44:55
inet addr:192.168.33.192 Bcast:192.168.33.255 Mask:255.255.255.0
inet6 addr: fe80::211:22ff:fe33:4455/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:22 errors:0 dropped:0 overruns:0 frame:0
TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3725 (3.6 KiB) TX bytes:852 (852.0 b)
guest)# ping amosk.info
PING amosk.info (69.175.108.82) 56(84) bytes of data.
64 bytes from nurpulat.uz (69.175.108.82): icmp_seq=1 ttl=43 time=306 ms

Changes from v1:
- rebased to latest tree
- replace system() by execv()

Signed-off-by: Amos Kong <kongjianjun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

show more ...

kvm tools: Add option to specify guest MAC

Add --guest-mac to specify the MAC of the guest.

Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

kvm tools: Organize net parameters into struct

Move network configuration parameters into a struct.
The amount of network parameters will be rather large, so better do it early.

Signed-off-by: Sash

kvm tools: Organize net parameters into struct

Move network configuration parameters into a struct.
The amount of network parameters will be rather large, so better do it early.

Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

show more ...

kvm tools: Make host side IP configurable

Add --host-ip-addr parameter to allow changing the host-side IP address.
Add a networking group to the cmdline menu.

Reviewed-by: Asias He <asias.hejun@gma

kvm tools: Make host side IP configurable

Add --host-ip-addr parameter to allow changing the host-side IP address.
Add a networking group to the cmdline menu.

Reviewed-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

show more ...

kvm tools: Implement virtio network device

This patch implement virtio network device.
Use '-n virtio or --network=virtio' to enable it.

The current implementation uses tap which needs root privile

kvm tools: Implement virtio network device

This patch implement virtio network device.
Use '-n virtio or --network=virtio' to enable it.

The current implementation uses tap which needs root privileges to create a
virtual network device (tap0) on host side. Actually, what we need is
CAP_NET_ADMIN.

The host side tap0 is set to 192.168.33.2/24.
You need to configure the guest side eth0 to any ip address in
192.168.33.0/24.

Here are some scp performance test for differenct implementations:
None of rx and tx as thread:
guest to host 3.2MB/s
host to guest 3.1MB/s

Only rx as thread:
guest to host 14.7MB/s
host to guest 33.4MB/s

Both rx and tx as thread(This patch works this way):
guest to host 19.8MB/s
host to guest 32.5MB/s

Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

show more ...