NFS Root with Raspberry Pi (nfs_diskless: no interface)

[Hans Petter Selasky]

On 09/24/15 18:36, Randy Westlund wrote:
> On Thu, Sep 24, 2015 at 08:37:06AM -0600, Ian Lepore wrote:
>> Try setting boot.netif.name="ue0" in loader.conf.  I've never tried
>> that, but in looking at the code, there's some chance it could work.  :)
>>
>> What I do is put these options into my RPi kernel config:
>>
>> options 	BOOTP
>> options 	BOOTP_NFSROOT
>> options 	BOOTP_NFSV3
>> options 	BOOTP_WIRED_TO=ue0
>>
>> But this requires configuring a bootp or dhcp server to provide the
>> info.  It should be possible to netboot without using BOOTP.
>>
>> -- Ian
>
> No luck with boot.netif.name.
>
> I'm using the kernel that comes in the FreeBSD RPI-B disk image.  Is
> there a way to see what it was built with?  I tried running strings on
> the kernel, but I'm not sure what to look for.  Otherwise I guess I'll
> build one myself.
>
> Randy
>

Hi,

The problem is that the code in:

sys/nfs/bootp_subr.c: SYSINIT(bootp_rootconf, SI_SUB_ROOT_CONF, 
SI_ORDER_FIRST, bootpc_init, NULL);

doesn't wait for the USB ethernet device to be enumerated. Only the 
vfs_mountroot() code which is running from the init-process does so.

Not sure what the best way to solve this is. Try putting:

pause("W", hz * 4);

Into the beginning of the "bootpc_init()" function.

--HPS