Disks certainly used to be kept on a global list... This may have  
changed recently, I guess?

How are disk stats returned to userland now?

-- thorpej@iPhone

On Aug 15, 2007, at 7:17 PM, Oliver Gould <ogould@olix0r.net> wrote:

> Hello-
>
> I see that there is a disk queue(9) (dk_link) stored in struct disk.
> Yet, there is no code that manipulates this structure member in
> sys/kern/subr_disk.c (nor, afaict with grep, anywhere else).  Is this
> TAILQ actually maintained somewhere?
>
> Either way, is there any way to iterate through attached disks (esp.
> from userland)?
>
> If there is not currently a way, I don't think that it would require  
> much
> more than adding TAILQ management into subr_disk.c?  This could be  
> exposed
> to userland through drvctl, unless there is a better place.
>
> This isn't critical yet, but it will be important later.
>
> Thanks,
>  - Oliver