VIMAGE crashes on 9.x with hotplug net80211 devices

[Adrian Chadd]

ping?

Marko - would you be willing to add the if_free() vnet context setup into -HEAD?

Hans, what do you think about USB device attach? detach will be
covered by the above (I hope!) but we still need to do a
CURVNET_SET(vnet0); during hotplug attach.

Thanks,


Adrian


On 23 October 2012 10:37, Adrian Chadd <adrian at freebsd.org> wrote:
> On 23 October 2012 00:16, Marko Zec <zec at fer.hr> wrote:
>
>> As already mentioned earlier, I don't terribly object if you'd place
>> CURVNET_SET(ifp->if_vnet) inside if_free() and a limited number of similar
>> functions, but I don't quite believe this is will enough to solve the
>> device_detach() issue without having to touch any of the drivers...
>
> That's why I'm asking for more/better ideas.
>
> So far my ideas are:
>
> * for hotplug insert - do the same as what you're doing during the
> kldload and boot device enumeration pass - call CURVNET_SET(vnet0)
> * for device unload (hotplug or otherwise) - if vnet isn't set,
> implicitly set it to vnet0
> * for the net80211 vaps, they get destroyed in a few places (ioctl
> path, device detach path, I'm sure I saw one more) so I have to use
> CURVNET_SET(ifp->if_vnet) on those.
>
> Now, that _should_ fix it for ath(4) and net80211, and it should fix
> it for all the other non-USB wireless devices out there.
>
> Now as for USB - Hans, what do you think? Should we do something
> similar? How does VIMAGE work right now with USB wireless and USB
> ethernet devices?
>
> Marko - thanks for persisting with this. I'd like to try and make this
> work for 10.0.
>
>
>
> Adrian