xhu 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
On 12/16/2011 11:33 AM, Jim Fehlig wrote: 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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