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3595e2eb0a
The test existing in QEMU for vhost-user feature is good for
testing the management protocol, but does not allow actual
traffic. This patch proposes Vhost-User Bridge application, which
can serve the QEMU community as a comprehensive test by running
real internet traffic by means of vhost-user interface.
Essentially the Vhost-User Bridge is a very basic vhost-user
backend for QEMU. It runs as a standalone user-level process.
For packet processing Vhost-User Bridge uses an additional QEMU
instance with a backend configured by "-net socket" as a shared
VLAN. This way another QEMU virtual machine can effectively
serve as a shared bus by means of UDP communication.
For a more simple setup, the another QEMU instance running the
SLiRP backend can be the same QEMU instance running vhost-user
client.
This Vhost-User Bridge implementation is very preliminary. It is
missing many features. I has been studying vhost-user protocol
internals, so I've written vhost-user-bridge bit by bit as I
progressed through the protocol. Most probably its internal
architecture will change significantly.
To run Vhost-User Bridge application:
1. Build vhost-user-bridge with a regular procedure. This will
create a vhost-user-bridge executable under tests directory:
$ configure; make tests/vhost-user-bridge
2. Ensure the machine has hugepages enabled in kernel with
command line like:
default_hugepagesz=2M hugepagesz=2M hugepages=2048
3. Run Vhost-User Bridge with:
$ tests/vhost-user-bridge
The above will run vhost-user server listening for connections
on UNIX domain socket /tmp/vubr.sock, and will try to connect
by UDP to VLAN bridge to localhost:5555, while listening on
localhost:4444
Run qemu with a virtio-net backed by vhost-user:
$ qemu \
-enable-kvm -m 512 -smp 2 \
-object memory-backend-file,id=mem,size=512M,mem-path=/dev/hugepages,share=on \
-numa node,memdev=mem -mem-prealloc \
-chardev socket,id=char0,path=/tmp/vubr.sock \
-netdev type=vhost-user,id=mynet1,chardev=char0,vhostforce \
-device virtio-net-pci,netdev=mynet1 \
-net none \
-net socket,vlan=0,udp=localhost:4444,localaddr=localhost:5555 \
-net user,vlan=0 \
disk.img
vhost-user-bridge was tested very lightly: it's able to bringup a
linux on client VM with the virtio-net driver, and execute transmits
and receives to the internet. I tested with "wget redhat.com",
"dig redhat.com".
PS. I've consulted DPDK's code for vhost-user during Vhost-User
Bridge implementation.
Signed-off-by: Victor Kaplansky <victork@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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| .. | ||
| acpi-test-data | ||
| image-fuzzer | ||
| libqos | ||
| multiboot | ||
| qapi-schema | ||
| qemu-iotests | ||
| rocker | ||
| tcg | ||
| vmstate-static-checker-data | ||
| .gitignore | ||
| ac97-test.c | ||
| ahci-test.c | ||
| bios-tables-test.c | ||
| boot-order-test.c | ||
| check-block.sh | ||
| check-qdict.c | ||
| check-qfloat.c | ||
| check-qint.c | ||
| check-qjson.c | ||
| check-qlist.c | ||
| check-qom-interface.c | ||
| check-qom-proplist.c | ||
| check-qstring.c | ||
| crypto-tls-x509-helpers.c | ||
| crypto-tls-x509-helpers.h | ||
| device-introspect-test.c | ||
| display-vga-test.c | ||
| drive_del-test.c | ||
| ds1338-test.c | ||
| e1000-test.c | ||
| eepro100-test.c | ||
| endianness-test.c | ||
| es1370-test.c | ||
| fdc-test.c | ||
| fw_cfg-test.c | ||
| hd-geo-test.c | ||
| i440fx-test.c | ||
| i82801b11-test.c | ||
| ide-test.c | ||
| intel-hda-test.c | ||
| ioh3420-test.c | ||
| ipoctal232-test.c | ||
| ivshmem-test.c | ||
| libqtest.c | ||
| libqtest.h | ||
| m48t59-test.c | ||
| Makefile | ||
| ne2000-test.c | ||
| nvme-test.c | ||
| pc-cpu-test.c | ||
| pcnet-test.c | ||
| pkix_asn1_tab.c | ||
| pvpanic-test.c | ||
| q35-test.c | ||
| qemu-iotests-quick.sh | ||
| qom-test.c | ||
| rcutorture.c | ||
| rtc-test.c | ||
| rtl8139-test.c | ||
| spapr-phb-test.c | ||
| tco-test.c | ||
| test-aio.c | ||
| test-bitops.c | ||
| test-coroutine.c | ||
| test-crypto-cipher.c | ||
| test-crypto-hash.c | ||
| test-crypto-tlscredsx509.c | ||
| test-crypto-tlssession.c | ||
| test-cutils.c | ||
| test-hbitmap.c | ||
| test-int128.c | ||
| test-iov.c | ||
| test-mul64.c | ||
| test-netfilter.c | ||
| test-opts-visitor.c | ||
| test-qdev-global-props.c | ||
| test-qemu-opts.c | ||
| test-qga.c | ||
| test-qmp-commands.c | ||
| test-qmp-event.c | ||
| test-qmp-input-strict.c | ||
| test-qmp-input-visitor.c | ||
| test-qmp-output-visitor.c | ||
| test-rcu-list.c | ||
| test-rfifolock.c | ||
| test-string-input-visitor.c | ||
| test-string-output-visitor.c | ||
| test-thread-pool.c | ||
| test-throttle.c | ||
| test-visitor-serialization.c | ||
| test-vmstate.c | ||
| test-write-threshold.c | ||
| test-x86-cpuid.c | ||
| test-xbzrle.c | ||
| tmp105-test.c | ||
| tpci200-test.c | ||
| usb-hcd-ehci-test.c | ||
| usb-hcd-ohci-test.c | ||
| usb-hcd-uhci-test.c | ||
| usb-hcd-xhci-test.c | ||
| vhost-user-bridge.c | ||
| vhost-user-test.c | ||
| virtio-9p-test.c | ||
| virtio-balloon-test.c | ||
| virtio-blk-test.c | ||
| virtio-console-test.c | ||
| virtio-net-test.c | ||
| virtio-rng-test.c | ||
| virtio-scsi-test.c | ||
| virtio-serial-test.c | ||
| vmxnet3-test.c | ||
| wdt_ib700-test.c | ||