#2057: Udev-122
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Reporter: [EMAIL PROTECTED] | Owner: [email protected]
Type: enhancement | Status: new
Priority: normal | Milestone: 7.0
Component: Book | Version: SVN
Severity: normal | Resolution:
Keywords: |
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Comment (by [EMAIL PROTECTED]):
Replying to [comment:47 Bryan Kadzban]:
> Since you're providing --subsystem on the udevadm command line, might
this work with kernels that don't provide the subsystem symlink on their
own (i.e. older than 2.6.18)? It would be nice if it did (if you still
have any of those kernels around to test). :-)
This does work on older kernels. As for --action=add, it is just the
default and should be dropped to save space. So we have:
{{{
for SYS in /sys/class/net/* ; do \
INTERFACE=${SYS##*/} udevadm test --subsystem=net $SYS ; \
done
}}}
plus a 2.6.18 kernel requirement for correct comments, and just 2.6.8 (or
even below) for correct rules in the simplest case. Tested with the
following kvm line:
{{{
kvm -hda hda.dsk \
-net nic,macaddr=50:54:00:12:34:56,model=ne2k_pci -net user \
-net nic,macaddr=50:54:00:12:34:57,model=rtl8139 \
-net nic,macaddr=50:54:00:12:34:58,model=pcnet \
-net nic,macaddr=50:54:00:12:34:59,model=pcnet
}}}
Since the SUBSYSTEMS keyword doesn't work with kernels below 2.6.18, the
commands above, when applied to old kernels, create incorrect rules for
the following two cases, neither of which are relevant to today's LFS:
* Xen
* S/390
and, of course, in all cases where upstream udev doesn't create sensible
rules with modern kernels.
--
Ticket URL: <http://wiki.linuxfromscratch.org/lfs/ticket/2057#comment:48>
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