On Thu, Mar 30, 2017 at 8:55 AM, Lennart Poettering
<lenn...@poettering.net> wrote:
> On Sat, 11.03.17 08:41, William Tu (u9012...@gmail.com) wrote:
>
>> Hi,
>> I'm not sure if this is caused by systemd-udev, apology if it's not
>> the right place. When doing
>> # brctl addbr default
>> add bridge failed: Invalid argument
>
> If brctl fails with EINVAL, then this suggests that the kernel refuses
> this already, and udev is not involved. Please ping the
> bridging/networking community.
>
> Lennart
>
> --
> Lennart Poettering, Red Hat
Hi Lennart,
Thanks for your reply. I've found out that it is indeed kernel refuses
"default" name of the netdev. By executing "brctl addbr default" and
tracing the kernel source, it shows "default" isn't allowed in one of
the netdev notifier, a call stack is below if anyone is interested:
sysctl_dev_name_is_allowed
devinet_sysctl_register
inetdev_event
notifier_call_chain
raw_notifier_call_chain
call_netdevice_notifiers_info
register_netdevice
register_netdev
br_add_bridge
Regards,
William
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