[RFC 11/12] keys/mktme: Add a new key service type for memory encryption keys

[David Howells]

Alison Schofield <alison.schofield at intel.com> wrote:

> If a preparse routine handles all the above, then if any of the
> above failures occur, the key service has less backing out to do.
> Is that the point?

Yes.  Ideally, ->instantiate() would never fail.

> How do I make the connection between the preparse and the instantiate? 
> Do I just put what I need to remember about this key request in the
> payload.data during preparse, so I can examine it again during
> instantiate?

Have a look at user_preparse().  It attaches the contribution to the supplied
key_preparsed_payload struct, which is then passed to ->instantiate() and
->update() as appropriate.  generic_key_instantiate() is used by the user key
type.

David