Re: [RFC] Netlink and user-space buffer pointers

[James Smart]

Stephen Hemminger wrote:
> On Wed, 19 Apr 2006 08:57:25 -0400
> James Smart <James.Smart@xxxxxxxxxx> wrote:
>
> > Folks,
> >
> > To take netlink to where we want to use it within the SCSI subsystem (as
> > the mechanism of choice to replace ioctls), we're going to need to pass
> > user-space buffer pointers.
>
> This changes the design of netlink. It is desired that netlink
> can be done remotely over the network as well as queueing.
> The current design is message based, not RPC based. By including a
> user-space pointer, you are making the message dependent on the
> context as it is process.
>
> Please rethink your design.

I assume that the message receiver has some way to determine where the
message originated (via the sk_buff), and thus could reject it if it
didn't meet the right criteria.  True ?  You just have to be cognizant
that it is usable from a remote entity - which is a very good thing.
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