For phase-1 the idea was to make btrfs encryption inline with
fs/crytpo which wasn't available when it started, so certainly there are
things which could straight away filter out after its known what went
into fs/crypto from ext4, especially the cryptography part.
Now, 4.10 kernel based, btrfs encryption using fs/crypto is here [1].
It has under gone limited testing by me and yet to arrive at a
conclusion on the file-name encryption, though its discussions are here
[2], and patches aren't sent out to the BTRFS ML yet.
[1] Phase-1.
Progs: https://github.com/asj/btrfs-progs-fscryptv1
Kernel: https://github.com/asj/linux-btrfs-fscryptv1
[2] File name encryption discussions are here:
(I don't see some of the emails I have in the google search, so
instead I have listed the subject for your search).
On the ext4 ML:
Sub: fs/crypto: file-name encryption, optional ?
Sub: fs/crypto: root read-access without key
Thanks, Anand
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