Re: [Embeddedxen-devel] [XenARM] Re:xen-pxa270-qemu

[sreenaath v. <sre...@gm...>]

Hi
I got your point.
I made a mistake by adding the "brctl addbr $BRIDGE" command to the
qemu-ifup script. Initially when I just followed the wiki and had the
original qemu-ifup script given in the wiki, it threw me error as 'br0' was
not added. Hence I added the command in qemu-ifup script, which I should not
have done and rather fired it from command line for the first time alone.
Regarding how I build the image, I ll post my reply in the next post.
Thanks :)

On Fri, Apr 23, 2010 at 9:53 AM, SAMBUC Lionel <lio...@he...>wrote:

> Hello,
>
> > -----Original Message-----
> > From: sreenaath vasudevan [mailto:sre...@gm...]
> > Sent: vendredi 23 avril 2010 04:14
> > To: emb...@li...
> > Subject: Re: [Embeddedxen-devel] [XenARM] Re:xen-pxa270-qemu
> >
> ...
> >
> >       3. Also I changed the /etc/wemu-ifup script as follows (added two
> > more lines to what is givien in the wiki for adding the bridge being
> > linking it with the tap0 interface.)
> >              /etc/qemu-ifup
> >
> >              #!/bin/sh
> >              BRIDGE=br0
> >             #setup in promiscuous mode qemu's device
> >             echo ifconfig $1 0.0.0.0 promisc up
> >             ifconfig $1 0.0.0.0 promisc up
> >             echo brctl addbr $BRIDGE
> >             brctl addbr $BRIDGE
> >             #add it to the bridge
> >             echo brctl addif $BRIDGE $1
> >             brctl addif $BRIDGE $1
> >
>
> While not being a show stopper, your qemu-ifup script seems wrong, please
> take the one from the GettingStarted guide. Based on your email, I also
> updated the guide this morning as some steps where incomplete.
>
> For reference, the complete script:
>
>  #!/bin/sh
>
>  BRIDGE=br0
>
>  #setup in promiscuous mode qemu's device
>  echo ifconfig $1 0.0.0.0 promisc up
>  ifconfig $1 0.0.0.0 promisc up
>  #add it to the bridge
>  echo brctl addif $BRIDGE $1
>  brctl addif $BRIDGE $1
>
> The bridge device is created once (normally in /etc/network/interfaces) and
> then only modified with regards to the linked interfaces (brctl addif and
> brctl delif commands). This is also why we can see complaints about trying
> to create a bridge interface which already exists.
>
> > ---------------------------------------------------------------------
> >       user@ubuntu:~/embeddedxen# sudo qemu-system-arm -localtime -M
> > mainstone -kernel ./xen/arch/arm/boot/uImage.mainstone -s -m 256 -pflash
> > ./flash1 -pflash ./flash2 -net nic -net
> tap,ifname=tap0,script=/etc/qemu-ifup
> >       ifconfig tap0 0.0.0.0 promisc up
> >       brctl addbr br0
> >       device br0 already exists; can't create bridge with the same name
>
> This error comes from your "brctl addbr $BRIDGE" command.
>
> >       brctl addif br0 tap0
> >       map addr 0x82200a0
> ...
> >
> > --
> > regards
> > sreenaath
>
> Have a nice day,
>
> Lionel
>



-- 
regards
sreenaath