Re: [libvirt] possible 0.9.8 regression?
xhu wrote:
On 12/16/2011 11:33 AM, Jim Fehlig wrote:
> Hi All,
>
> I've noticed a regression in libvirt 0.9.8 on some of my kvm test machines
>
> # virsh start opensuse12
> error: Failed to start domain opensuse12
> error: Cannot open network interface control socket: Permission denied
For I can't reproduce it on my machine with 0.9.8, can you provide me
the detailed steps?
Nothing special, basic domain config using file-backed disk and
connecting to a bridge.
Also your os, libvirt, qemu-kvm and kernel version?
Yeah, it has something to do with the kernel, glibc, or other such
component. qemu-kvm isn't the problem as the error occurs before it is
invoked.
kernel 3.1.0, glibc 2.14.1 (openSUSE12.1):
With libvirt 0.9.7, starting the domain works. This version of libvirt
opens control socket with 'socket(AF_INET, SOCK_STREAM, 0)'. With
libvirt 0.9.8, the domain does not start. In this version, the control
socket is opened with 'socket(AF_PACKET, SOCK_DGRAM, 0)', which fails
with EACCES.
kernel 3.0.13, glibc 2.11.3 (SLES11 SP2):
Regression between libvirt 0.9.7 and 0.9.8 not observed.
Initially, I assumed the bug was in glibc. But I can open packet(7)
sockets in a test program running as uid=euid=0, just not within
libvirtd running with same privileges.
Regards,
Jim
Thanks!
> Opening a control socket for setting MAC addr, etc. failed with EACCES.
> In 0.9.7, the socket was opened with domain AF_INET, type SOCK_STREAM,
> which of course works on this system. In 0.9.8, the socket is opened
> with AF_PACKET, SOCK_DGRAM. Interestingly, a small test program calling
> 'socket(AF_PACKET, SOCK_DGRAM, 0)' works on this system.
>
> libvirt is built with '--without-capng --without-apparmor
> --without-selinux' and libvirtd is running with uid=euid=0.
>
> I'm really baffled why this fails in libvirtd but works otherwise. Any
> ideas?
>
> Thanks,
> Jim
>
>
>
>
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