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Tracking bug for RFE and all dependant bugs & FREs covering encrypted volume support in LVM2 and key management interface.

>  a) add support of crypto segment into libdevmapper
>
>  b) add support for lvm metadata (keystore, crypt segments)
> 
>  c) define key management interface + lvm internals
> 
>  d) write cyptsetup/LUKS backward compatible key management plugin
> 
>  e) provide low level key management tool (using key management plugins above)
> 
>  f) provide support for encrypted LVs in basic lvm tools
> 
>  g) support more complicated operations (pvmove, online reencryption)

See also patches https://www.redhat.com/archives/lvm-devel/2009-January/msg00082.html

This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux major release.  Product Management has requested further
review of this request by Red Hat Engineering, for potential inclusion in a Red
Hat Enterprise Linux Major release.  This request is not yet committed for
inclusion.

I am closing this and will perhaps create a new tracker for volume encryption related bugs.

Integration with lvm2 will cause more problems than it solves, it would be better to have separate encryption layer and some mechanism how to manipulate better with device stack.

(From the kernel/performance point of view it is exactly the same - stacked device-mapper devices.)