On Mon, Dec 28, 2015 at 08:26:44PM -0500, Doug Ledford wrote: > On 12/28/2015 05:20 PM, Daniel Borkmann wrote: > > On 12/28/2015 10:53 PM, Doug Ledford wrote: > >> The 4.4-rc7 kernel is failing for me. In my case, all of my vlan > >> interfaces are failing to obtain a dhcp address using dhclient. I've > >> tried a hand built 4.4-rc7, and the Fedora rawhide 4.4-rc7 kernel, both > >> failed. I've tried NetworkManager and the old SysV network service, > >> both fail. I tried a working dhclient from rhel7 on the Fedora rawhide > >> install and it failed too. Running tcpdump on the interface shows the > >> dhcp request going out, and a dhcp response coming back in. Running > >> strace on dhclient shows that it writes the dhcp request, but it never > >> recvs a dhcp response. If I manually bring the interface up with a > >> static IP address then I'm able to run typical IP traffic across the > >> link (aka, ping). It would seem that when dhclient registers a packet > >> filter on the socket, that filter is preventing it from ever getting the > >> dhcp response. The same dhclient works on any non-vlan interfaces in > >> the system, so the filter must work for non-vlan interfaces. Aside from > >> the fact that the interface is a vlan, we also use a priority egress map > >> on the interface, and we use PFC flow control. Let me know if you need > >> anymore to debug the issue, or email me off list and I can get you > >> logins to my reproducer machines. > > > > When you say 4.4-rc7 kernel is failing for you, what latest kernel version > > was working, where the socket filter was properly receiving the response on > > your vlan iface? > > v4.3 final works. I haven't bisected where in the 4.4 series it quits > working. I can do that tomorrow.
I've tried to reproduce, but cannot seem to make dnsmasq work properly over vlan, so bisect would be great. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
