zfs code - Aug 2007 - adding a new pool property

As part of the ZFS crypto project we are planning on adding a new pool 
level property.  This property will indicate "where" to find the per 
pool wrapping key (the dataset key encryption key, DSKEK).

This property will ideally be a string since we need to store values 
like the following

"passphase" - the string ''p'', ''a'',
''s'', ... not the acutal passphrase
"file:<pathname>"
"pkcs11:[<token>]:[<manuf>]:[<serial>]:<objlabel>"

eg

file:/rmdisk/mykeys/zfs/tank

pkcs11:Sun Softoken:::tankdskek
pkcs11::::tankdskek
I''ve tried to clone what the bootfs property does but that
doesn''t seem
to be the correct thing to do since it doesn''t appear to store the 
string but store the objnum.

Can a pool property be a string ?

If so how should I be making it persist.

-- 
Darren J Moffat

Darren J Moffat wrote:
>Can a pool property be a string ?
>
>  
>
Yes.
>If so how should I be making it persist.
>
>  
>
Adding it to the MOS pool property object (spa_set_props)
makes it persistent.

I am at the final stage to clean up the pool property code
for 6565437 zpool property extensions.  We can discuss it
offline if you like.

Lin