stephane.rivi...@regis-dgac.net wrote: > Hi, > > I'm using LXC to run Perl scripts that generate network traffic, using the > Net::RawIP package. > The scripts work perfectly well on a "real" host, but fail inside an LXC > container. > > After a few hours of testing/debuging, the origin of the problem is that > some basic ioctl calls on socket fails. > > Net::RawIP relies on SIOCGIFADDR et SIOCGIFHWADDR to get the IP and MAC > addresses of the network interface. > > My container has 2 interfaces : 1 macvlan (normally used to generate > traffic) and 1 bridged (to dialogue with the host and the other > containers). > > In the container, these ioctl calls fail with an "Invalid argument" on > every interface, including the loopback. > > > I've extracted the failing code from Net::RawIP to have a simple test > program (code at the end of the message). > It just creates a socket and do the 2 ioctl calls on it. > > My LXC configuration is based on the article of Stéphane Graber > (http://www.stgraber.org/category/lxc): > > - host : Ubuntu 9.10 Desktop (2.6.31 kernel) > - containers : Ubuntu 8.04 > > > I really don't know what's wrong, because ifconfig relies on the same > basic call to get interface information... > > If anyone has any idea, I would greatly appreciate it :-) >
Good report, thanks ! I was able to reproduce it. The problem is coming from the kernel, the following lines are still there in the file net/packet/af_packet.c, [ ... ] if (!net_eq(sock_net(sk), &init_net)) return -ENOIOCTLCMD; [ ... ] in the packet_ioctl function. It shouldn't. These lines mean the af_packet is not namespace aware, but I think this is no longer the case still a long time now ... I assume just removing these two lines will fix the problem. Thanks -- Daniel ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Lxc-users mailing list Lxc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lxc-users