[Qemu-devel] slirp regression

[Qemu-devel] slirp regression

[Avi Kivity]

Slirp now defaults to direct connection (no gateway) to 10.0.0.0/8, 
compared to 10.0.2.0/24 in the past.  This renders my real 10.0.0.0/8 
network inaccessible.

Also, NetworkManager in F11 isn't able to bind to the network - I have 
to dhclient manually.  I don't know whether this is a regression or an 
F11 bug.

-- 
error compiling committee.c: too many arguments to function

[Qemu-devel] Re: slirp regression

[Jan Kiszka]

Avi Kivity wrote:
> Slirp now defaults to direct connection (no gateway) to 10.0.0.0/8,
> compared to 10.0.2.0/24 in the past.  This renders my real 10.0.0.0/8
> network inaccessible.
> 
> Also, NetworkManager in F11 isn't able to bind to the network - I have
> to dhclient manually.  I don't know whether this is a regression or an
> F11 bug.

Please post the corresponding pcap trace generated by "-net dump".

Thanks,
Jan

-- 
Siemens AG, Corporate Technology, CT SE 2
Corporate Competence Center Embedded Linux

Re: [Qemu-devel] Re: slirp regression

[Avi Kivity]

On 07/02/2009 11:14 AM, Jan Kiszka wrote:
> Avi Kivity wrote:
>    
>> Slirp now defaults to direct connection (no gateway) to 10.0.0.0/8,
>> compared to 10.0.2.0/24 in the past.  This renders my real 10.0.0.0/8
>> network inaccessible.
>>
>> Also, NetworkManager in F11 isn't able to bind to the network - I have
>> to dhclient manually.  I don't know whether this is a regression or an
>> F11 bug.
>>      
>
> Please post the corresponding pcap trace generated by "-net dump".
>
>    
[avi@barcelona1 qemu-kvm (master)]$ q -m 1024 /images/F11.img -cdrom 
/home/avi/iso/linux/Fedora-11-x86_64-DVD.iso -net nic -net user  -drive 
file=/dev/vg0/compile,if=virtio,cache=none -smp 8 -redir tcp:4444::22 
-net dump
kvm_create_vcpu: Bad file descriptor
kvm_create_vcpu: Bad file descriptor
kvm_create_vcpu: Bad file descriptor
kvm_create_vcpu: Bad file descriptor
kvm_create_vcpu: Bad file descriptor
kvm_create_vcpu: Bad file descriptor
kvm_create_vcpu: Bad file descriptor
kvm_create_vcpu: Bad file descriptor
create_userspace_phys_mem: Bad file descriptor
kvm_cpu_register_physical_memory: failed

Looks like something is closing random file descriptors.

-- 
error compiling committee.c: too many arguments to function

Re: [Qemu-devel] Re: slirp regression

[Avi Kivity]

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On 07/02/2009 01:03 PM, Avi Kivity wrote:
> On 07/02/2009 11:14 AM, Jan Kiszka wrote:
>> Avi Kivity wrote:
>>> Slirp now defaults to direct connection (no gateway) to 10.0.0.0/8,
>>> compared to 10.0.2.0/24 in the past.  This renders my real 10.0.0.0/8
>>> network inaccessible.
>>>
>>> Also, NetworkManager in F11 isn't able to bind to the network - I have
>>> to dhclient manually.  I don't know whether this is a regression or an
>>> F11 bug.
>>
>> Please post the corresponding pcap trace generated by "-net dump".
>>
> [avi@barcelona1 qemu-kvm (master)]$ q -m 1024 /images/F11.img -cdrom 
> /home/avi/iso/linux/Fedora-11-x86_64-DVD.iso -net nic -net user  
> -drive file=/dev/vg0/compile,if=virtio,cache=none -smp 8 -redir 
> tcp:4444::22 -net dump
> kvm_create_vcpu: Bad file descriptor
> kvm_create_vcpu: Bad file descriptor
> kvm_create_vcpu: Bad file descriptor
> kvm_create_vcpu: Bad file descriptor
> kvm_create_vcpu: Bad file descriptor
> kvm_create_vcpu: Bad file descriptor
> kvm_create_vcpu: Bad file descriptor
> kvm_create_vcpu: Bad file descriptor
> create_userspace_phys_mem: Bad file descriptor
> kvm_cpu_register_physical_memory: failed
>
> Looks like something is closing random file descriptors.
>

Simplifying the command line I do get a dump, attached.  No dhcp packets 
there.


-- 
error compiling committee.c: too many arguments to function


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Re: [Qemu-devel] Re: slirp regression

[Avi Kivity]

On 07/02/2009 01:03 PM, Avi Kivity wrote:
>
> Looks like something is closing random file descriptors.
>

This fails:

    q -m 1024 /images/F11.img  -net nic -net user -redir tcp:4444::22  
-net dump

But this succeeds:

    q -m 1024 /images/F11.img  -net nic -net user -net dump



-- 
error compiling committee.c: too many arguments to function

Re: [Qemu-devel] Re: slirp regression

[Jan Kiszka]

Avi Kivity wrote:
> On 07/02/2009 01:03 PM, Avi Kivity wrote:
>>
>> Looks like something is closing random file descriptors.
>>
> 
> This fails:
> 
>    q -m 1024 /images/F11.img  -net nic -net user -redir tcp:4444::22 
> -net dump
> 
> But this succeeds:
> 
>    q -m 1024 /images/F11.img  -net nic -net user -net dump
> 

Does -net user,hostfwd=tcp::4444-:22 work for you? I will check the
legacy path later.

Jan

-- 
Siemens AG, Corporate Technology, CT SE 2
Corporate Competence Center Embedded Linux

Re: [Qemu-devel] Re: slirp regression

[Jan Kiszka]

Avi Kivity wrote:
> On 07/02/2009 01:03 PM, Avi Kivity wrote:
>> On 07/02/2009 11:14 AM, Jan Kiszka wrote:
>>> Avi Kivity wrote:
>>>> Slirp now defaults to direct connection (no gateway) to 10.0.0.0/8,
>>>> compared to 10.0.2.0/24 in the past.  This renders my real 10.0.0.0/8
>>>> network inaccessible.
>>>>
>>>> Also, NetworkManager in F11 isn't able to bind to the network - I have
>>>> to dhclient manually.  I don't know whether this is a regression or an
>>>> F11 bug.
>>>
>>> Please post the corresponding pcap trace generated by "-net dump".
>>>
>> [avi@barcelona1 qemu-kvm (master)]$ q -m 1024 /images/F11.img -cdrom
>> /home/avi/iso/linux/Fedora-11-x86_64-DVD.iso -net nic -net user 
>> -drive file=/dev/vg0/compile,if=virtio,cache=none -smp 8 -redir
>> tcp:4444::22 -net dump
>> kvm_create_vcpu: Bad file descriptor
>> kvm_create_vcpu: Bad file descriptor
>> kvm_create_vcpu: Bad file descriptor
>> kvm_create_vcpu: Bad file descriptor
>> kvm_create_vcpu: Bad file descriptor
>> kvm_create_vcpu: Bad file descriptor
>> kvm_create_vcpu: Bad file descriptor
>> kvm_create_vcpu: Bad file descriptor
>> create_userspace_phys_mem: Bad file descriptor
>> kvm_cpu_register_physical_memory: failed
>>
>> Looks like something is closing random file descriptors.
>>
> 
> Simplifying the command line I do get a dump, attached.  No dhcp packets
> there.

Hmm, I'm not sure ATM if the previous netmask was /24, but I will check
again and fix the defaults if required.

Jan

-- 
Siemens AG, Corporate Technology, CT SE 2
Corporate Competence Center Embedded Linux

Re: [Qemu-devel] Re: slirp regression

[Avi Kivity]

On 07/02/2009 01:23 PM, Jan Kiszka wrote:
>> This fails:
>>
>>     q -m 1024 /images/F11.img  -net nic -net user -redir tcp:4444::22
>> -net dump
>>
>> But this succeeds:
>>
>>     q -m 1024 /images/F11.img  -net nic -net user -net dump
>>
>>      
>
> Does -net user,hostfwd=tcp::4444-:22 work for you? I will check the
> legacy path later.
>
>    

It does.

-- 
error compiling committee.c: too many arguments to function

[Qemu-devel] Re: slirp regression

[Jan Kiszka]

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Avi Kivity wrote:
> On 07/02/2009 01:23 PM, Jan Kiszka wrote:
>>> This fails:
>>>
>>>     q -m 1024 /images/F11.img  -net nic -net user -redir tcp:4444::22
>>> -net dump
>>>
>>> But this succeeds:
>>>
>>>     q -m 1024 /images/F11.img  -net nic -net user -net dump
>>>
>>>      
>>
>> Does -net user,hostfwd=tcp::4444-:22 work for you? I will check the
>> legacy path later.
>>
>>    
> 
> It does.
> 

Confirmed and found. That was an interesting bug - a kvm kernel bug!
Patches for the latter and a workaround for userland will follow.

Jan


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