[libvirt-users] SCM_RIGHTS file error when attaching device?

[Daniel P. Berrange]

On Tue, Jun 15, 2010 at 01:10:28PM -0700, steven765 at yahoo.com wrote:
> So I just upgraded to 0.8.1-1 and virt-manager 8.4 when i try to attach my network card that's been perfectly fine in the past i now get...
> 
> virsh # attach-device gnome /etc/libvirt/qemu/nic.xml
> error: Failed to attach device from /etc/libvirt/qemu/nic.xml
> error: internal error unable to send TAP file handle: No file descriptor supplied via SCM_RIGHTS

This is a flaw in QEMU fixed upstream

commit e53f27b9d9df73461308618151fa6e6392aebd85
Author: Paolo Bonzini <pbonzini at redhat.com>
Date:   Fri Apr 16 17:25:23 2010 +0200

    stash away SCM_RIGHTS fd until a getfd command arrives
    
    If there is already a fd in s->msgfd before recvmsg it is
    closed by parts that this patch does not touch.  So, only
    one descriptor can be "leaked" by attaching it to a command
    other than getfd.
    
    Signed-off-by: Paolo Bonzini <pbonzini at redhat.com>
    Signed-off-by: Luiz Capitulino <lcapitulino at redhat.com>


Regards,
Daniel
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