Bug#615600: BOOTIF= kernel commandline option does not work
On Wed, Mar 02, 2011 at 04:44:07PM +0100, Ferenc Wagner wrote:
> Marc Haber <mh+debian-bugs@zugschlus.de> writes:
> > On Wed, Mar 02, 2011 at 01:41:58AM +0100, Ferenc Wagner wrote:
> >
> >> Marc Haber <mh+debian-bugs@zugschlus.de> writes:
> >>
> >>> On Tue, Mar 01, 2011 at 04:28:16PM +0100, Marc Haber wrote:
> >>>
> >>>> I guess the following changes do kind of a job:
> >>>> etc/udev/rules.d/69-bootif.rules (inside the installer's initrd)
> >>>> ACTION=="add", SUBSYSTEM=="net", IMPORT{program}="bootif $attr{address}"
> >>>>
> >>>> Unfortunately, this seems to go a little too far. My test system comes
> >>>> up with the second interface being the bootif, so it's eth1 without
> >>>> these additions.
> >>>
> >>> This seems to be the fault of the additional rule which gives the
> >>> impression that the rule is actually doing something. Even when I
> >>> replace the bootif script with a call to true, I get multiple stanzas
> >>> per interface in 70-persistent-net.rules.
> >>
> >> In my limited testing (with two Qemu interfaces) this didn't happen
> >> after several
> >>
> >> # rm 70-persistent-net.rules
> >> # udevadm trigger --verbose --action=add --subsystem-match=net
> >>
> >> cycles.
> >
> > Did you try with a multiprocessor VM? I guess that this is some
> > threading/multiprocessing issue that multiple interfaces get processed
> > at the same time, causing races.
>
> Maybe, I didn't try it on SMP. write_net_rules has some locking to
> prevent such issues, though.
My rule hasn't, but it shouldn't do anything if the script is silent,
should it?
> >> Actually, your rule worked perfectly well, despite that you don't
> >> reserve the eth0 name, just try to assign it even if it's taken
> >> already. Unless I overlook something, this should be fixed.
> >
> > How do I reserve a name?
>
> By renaming eth0 to something else, unless it isn't the boot interface.
So my script should print INTERFACE_NAME="foo0" to its standard output
if invoked for an interface that is eth0 and not the boot interface?
And who is responsible to rename it back into the ethx namespace?
Greetings
Marc
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