> could we get the SRU template information included in this bug? doh. sorry, been awfully busy lately. added.
** Description changed: + [impact] + + in bug 1573272, the vlan pkg was changed to perform a full ifup inside + its if-pre-up.d/vlan script. This allowed correct ordering of ifup for + a vlan and its raw-device, as previously there was a race condition + between them (see that bug for details). + + However, this causes hangs during ifup with certain specific configs. + The reasons are given starting in comment 13. + + The result is a regression for those using the specific ifupdown + configs; when they try to reboot and/or ifup -a, it will hang trying to + bring up their network, preventing boot from finishing (or hanging + before the network is fully configured). + + [test case] + + upgrade to the latest vlan package and configure the system with an + affected ifupdown config, then reboot. The reboot will hang while + trying to bring the network up. + + see the original description below for an example ifupdown config to + reproduce this, although there are other possible configs that will/may + trigger this regression. + + [regression potential] + + The fix for this moves the creation of the vlan(s) corresponding to a + physical raw-device 'hotplug' event out of the udev processing path for + the raw-device, and into an ifup post script for the raw-device ifup. + If this is not done correctly, then any interfaces that are hotplugged, + and have vlans configured on them, may fail to correctly + create/configure their vlan(s). + + This change does remove the direct call to ifup from the if-pre-up.d (or + if-up.d) scripts, so there should not be any regression potential for + more ifup deadlocks. + + [other info] + + this required both ifupdown and vlan to be patched. vlan was patched to + remove the problematic call to ifup from the vlan pre-up script, and add + a call to create the vlan interface(s) from a new post-up script, as + well as adding a parameter to vlan-network-interface script to handle + the call from udev itself differently than a call from elsewhere (such + as the if-up.d/vlan script). this works for bootup and ifup/ifup -a, + but fails for device hotplug because of a bug in ifupdown that prevents + calling ifquery from an ifup script; that has been patched upstream + already, and is the only ifupdown change needed here. + + + [original description] + When upgrading from version 1.9-3ubuntu10.1, a previously working machine can't successfully reboot completely. ifup is hanging indefinitely, with this process structure (from "pstree -a 1299"): ifup,1299 -a - └─run-parts,1501 /etc/network/if-pre-up.d - └─bridge,1502 /etc/network/if-pre-up.d/bridge - └─bridge,1508 /etc/network/if-pre-up.d/bridge - └─vlan,1511 /etc/network/if-pre-up.d/vlan - └─ifup,1532 eth0 - + └─run-parts,1501 /etc/network/if-pre-up.d + └─bridge,1502 /etc/network/if-pre-up.d/bridge + └─bridge,1508 /etc/network/if-pre-up.d/bridge + └─vlan,1511 /etc/network/if-pre-up.d/vlan + └─ifup,1532 eth0 <begin content of /etc/network/interfaces> auto lo iface lo inet loopback auto eth0 iface eth0 inet static - address 192.168.10.65 - netmask 255.255.255.192 - gateway 192.168.10.66 + address 192.168.10.65 + netmask 255.255.255.192 + gateway 192.168.10.66 auto eth0.11 - address 192.168.11.1 - netmask 255.255.255.0 + address 192.168.11.1 + netmask 255.255.255.0 auto br1134 iface br1134 inet manual - bridge_ports eth0.1134 - bridge_stp off - bridge_fd 0 + bridge_ports eth0.1134 + bridge_stp off + bridge_fd 0 <end content of /etc/network/interfaces> The underlying interface eth0.1134 is not explicitly defined, but was previously auto-created during "ifup -a" execution. This apparently fails now. Reverting back to the 10.1 version re-establishes old behavior. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1701023 Title: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ifupdown/+bug/1701023/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
