On 12/29/2015 10:43 PM, Alexei Starovoitov wrote: > 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. >
Yeah, I've been working on it. Issues with available machines that
reproduce combined with what hardware they have and whether or not that
hardware works at various steps in the bisection :-/
--
Doug Ledford <dledf...@redhat.com>
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