Date: Wed, 2 Feb 2011 17:12:54 +0000 (UTC) From: "Bjoern A. Zeeb" <bz@FreeBSD.org> To: Monthadar Al Jaberi <monthadar@gmail.com> Cc: FreeBSD virtualization mailing list <freebsd-virtualization@freebsd.org> Subject: Re: simulating wireless device (if_alloc panic, VirtualBox, VIMAGE) Message-ID: <20110202164827.I80258@maildrop.int.zabbadoz.net> In-Reply-To: <AANLkTi=mk2vfyXJBaK5mV2sBWEj0-RDZneLs%2BXq_c7sb@mail.gmail.com> References: <AANLkTik8D_bLwcUKZdBT-kpkJdDXtPTLvAqfUe0cLoSz@mail.gmail.com> <4D484213.6050100@freebsd.org> <AANLkTikJKZLQVA5X2PQs0oT4iFsZYBw7K07kjQTc9iGD@mail.gmail.com> <4D486108.5060805@freebsd.org> <AANLkTi=mk2vfyXJBaK5mV2sBWEj0-RDZneLs%2BXq_c7sb@mail.gmail.com>
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On Wed, 2 Feb 2011, Monthadar Al Jaberi wrote: Hi, > Thanx makes more sense, but I have noticed something weired if you can > shade some light on. > > I added printfs one when the module is first loaded (static int > event_handler(module_t module, int event, void *arg)): > curthread=0xc3f95870 > curthread->td_vnet=0xc3170e00 > curthread->td_ucred=0xc3185d00 > TD_TO_VNET=0 > CRED_TO_VNET=0 Try to load it from laoder on boot; I think that should work as we are setting the curvent for the kernel startup. The problem you are seeing is a bug in the current implementation that you cannot add any physical network interface after the kernel started. This applies to cardbus/usb/... as well as any kind of ethernet interface, so a kldload igb should yield it as well. The fix for that is easy and hard at the same time: A) either touch all drivers B) or touch all cloned interfaces and change 3 common lines. or try to make cloners aware of vimages. Solution B) is sitting in perforce with the entire stuff that it depends on and was started with CH=179022,179255 but not limited to that if you want to have a peek. What you certainly can do locally to your driver for now is to make a change like this: +#ifdef VIMAGE + CURVNET_SET(vnet0); +#endif ifp = if_alloc(IFT_ETHER); +#ifdef VIMAGE + CURVNET_RESTORE(); +#endif It's the type A) kind of change from above that will break eventually in the future. /bz -- Bjoern A. Zeeb You have to have visions! <ks> Going to jail sucks -- <bz> All my daemons like it! http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/jails.html
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