> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
> boun...@opensolaris.org] On Behalf Of David Dyer-Bennet
> 
> However, if Oracle makes a binary release of BTRFS-derived code, they
> must
> release the source as well; BTRFS is under the GPL.

When a copyright holder releases something under GPL, it only means they've
granted you and the rest of the world permission to use it according to the
terms of GPL.

The copyright holder always retains permission for themselves to
redistribute in any form, under a different license if they want to.

If you (Microsoft) are a developer of a proprietary product, and you want to
link in some GPL library and keep it private and proprietary, you can
attempt negotiations with the copyright holder, to get that code released to
you for your purposes, under terms which are not GPL.

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