https://bugzilla.novell.com/show_bug.cgi?id=829033 https://bugzilla.novell.com/show_bug.cgi?id=829033#c1 Robert Milasan changed: What |Removed |Added ---------------------------------------------------------------------------- Priority|P5 - None |P4 - Low Status|NEW |ASSIGNED CC| |rmilasan@suse.com AssignedTo|rmilasan@suse.com |mt@suse.com --- Comment #1 from Robert Milasan 2013-07-17 08:55:30 UTC --- The rule is part of sysconfig and it's maintained by Marius Tomaschewski, but I will stay in the CC. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=829033 https://bugzilla.novell.com/show_bug.cgi?id=829033#c3 --- Comment #3 from Richard Weinberger 2013-07-17 14:11:11 UTC --- libvirt creates veth devies and sets them up/down. If udevd also starts configuring them we end up in a situation where libvirt thinks that an interface is up, but is in reality down and vice versa. Fell free to read that thread: http://www.redhat.com/archives/libvir-list/2013-July/msg00008.html Gao feng and myself wasted a lot of time with hunting such an issue down. Thanks, //richard -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=829033 https://bugzilla.novell.com/show_bug.cgi?id=829033#c5 Marius Tomaschewski changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEEDINFO |RESOLVED InfoProvider|richard@nod.at | Resolution| |INVALID --- Comment #5 from Marius Tomaschewski 2013-07-17 21:24:11 UTC --- (In reply to comment #3)

libvirt creates veth devies and sets them up/down.

Right.

If udevd also starts configuring them we end up in a situation where libvirt thinks that an interface is up, but is in reality down and vice versa.

No, udev does not create them -- it just handles the event when interface appears in the system (created by libvirt in this case) or is removed from the system/kernel (triggered by libvirt, cleanup call on sysconfig side). There is no ifcfg-file for the veth interfaces, so nothing is done and nothing happens. When there is one, it is there a) by intention or b) libvirt is trying to use a system configured/reserved interface name, that is a misconfiguration. (In reply to comment #4)

BTW: There is *zero* reason why udevd should handle virtual network devices...

e.g. routed vm configuration on the host side, we've used with xen. The user may want to create a ifcfg-file with STARTMODE=hotplug and ifroute-file to apply routes. As there is no issue, resolving as INVALID. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=829033 https://bugzilla.novell.com/show_bug.cgi?id=829033#c7 --- Comment #7 from Marius Tomaschewski 2013-07-18 09:08:11 UTC --- (In reply to comment #6)

So, can you please explain me why udevd is calling "/sbin/ifdown veth5 -o hotplug"? On my system is no ifcfg file for veth5.

To mark it "rename done" (by udev; or rule 77 reached), track the state and _if_ there is ifcfg config, to start the interface. That there is no ifcfg-veth5 file, does not mean there is really no ifcfg config for the interface: it could be an iBFT interface and ifup reads the iBFT NICs as ifcfg config - it even ignores an existing ifcfg file - then. Further, when there is no iBFT but a ifcfg-file, it may have STARTMODE=off, disabling it even ifcfg file exists. A test -f file is not sufficient. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=829033 https://bugzilla.novell.com/show_bug.cgi?id=829033#c9 Marius Tomaschewski changed: What |Removed |Added ---------------------------------------------------------------------------- Status|RESOLVED |REOPENED Resolution|INVALID | AssignedTo|mt@suse.com |jfehlig@suse.com --- Comment #9 from Marius Tomaschewski 2013-07-18 19:47:06 UTC --- IMO libvirt is missing an "udevadm settle" call between "remove foo; add foo" -- the "add" and "link up" calls in libvirt are done before udev finished the "remove" event processing. See also link in comment 8. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.