Re: [Qemu-devel] [PATCH v4 03/10] tests: Add vm test lib

[Fam Zheng]

On Wed, 08/30 11:29, Fam Zheng wrote:
> On Tue, 08/29 09:15, Philippe Mathieu-Daudé wrote:
> > > +        self._args = [ \
> > > +            "-nodefaults", "-m", "2G",
> > > +            "-cpu", "host",
> > > +            "-netdev", "user,id=vnet,hostfwd=:0.0.0.0:0-:22",
> > 
> > Testing with debian/unstable:
> > 
> > $ make vm-build-netbsd V=1
> > ./tests/vm/netbsd  --debug   --image "tests/vm/netbsd.img" --build-qemu .
> > DEBUG:root:Creating archive /tmp/qemu-vm-PxfXNv/data-3a52c.tar for data dir:
> > .
> > DEBUG:root:QEMU args: -nodefaults -m 2G -cpu host -netdev
> > user,id=vnet,hostfwd=:0.0.0.0:0-:22 -device virtio-net-pci,netdev=vnet -vnc
> > :0,to=20 -serial file:/tmp/qemu-vm-PxfXNv/serial.out -smp 4 -enable-kvm
> > -device VGA -drive
> > file=tests/vm/netbsd.img,snapshot=on,if=none,id=drive0,cache=writeback
> > -device virtio-blk,drive=drive0,bootindex=0 -drive 
> > file=/tmp/qemu-vm-PxfXNv/data-3a52c.tar,if=none,id=data-3a52c,cache=writeback,format=raw
> > -device virtio-blk,drive=data-3a52c,serial=data-3a52c,bootindex=1
> > Failed to prepare guest environment
> 
> Can you please look into the stderr of the QEMU command line to see what
> arguments went wrong? (I hope the qemu.py improvement patches on the list can
> give a better error message in such cases.)

I've tested with Fedora 26's qemu-system-x86-2.9.0-5.fc26.x86_64 and got the
failure due to the hostfwd syntax:

qemu-system-x86_64: -netdev user,id=vnet,hostfwd=:0.0.0.0:0-:22: invalid host 
forwarding rule ':0.0.0.0:0-:22'
qemu-system-x86_64: -netdev user,id=vnet,hostfwd=:0.0.0.0:0-:22: Device 'user' 
could not be initialized

But it makes sense to use dynamic port allocation to avoid collision.

Since it's about developing QEMU, using cutting edge QEMU features is not that
bad. Let's keep this one.

Fam