[Xen-devel] HVM vif without bridge

[Samuel Thibault <samuel.thibault@xxxxxxxxxxxxx>]

Hello,

When using xen without a bridge but NAT or routing, HVM domains can't
boot, and qemu-dm-n.log contains:

config qemu network with xen bridge for  tap0 xenbr0
bridge xenbr0 does not exist!

That's because the qemu-ifup script always tries to add the vif to
a default-named xenbr0 bridge. On the contrary, PV domains just work
fine with the same configuration file except HVM parameters.

I can see several solutions:

- The attached "patch" just ignores brctl failure. Far from elegant, but
  works fine
- The attached "patch2" drops the default xenbr0 bridge, and then people
  have to set bridge=xenbr0 in their configuration file.
- move qemu-ifup into three bridge, nat and route scripts, and add
  another xend-config parameter, along network-script and vif-script,
  which should point to either of those according to the values of
  network-script and vif-script.

It looks to me like the first solution could be used as a workaround for
now and the last one would be preferable for the long run.

Samuel

Signed-off-by: Samuel Thibault <samuel.thibault@xxxxxxxxxx>

Attachment: patch
Description: Text document

Attachment: patch2
Description: Text document

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