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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
Fan Du