[dm-devel] [PATCH 5/9] block: support diskcipher

[boojin.kim]

On 8/21/19 21:09 AM, Jens Axboe wrote:
> This isn't going to happen. With this, and the inline encryption
> proposed by Google, we'll bloat the bio even more. At least the Google
> approach didn't include bio iter changes as well.

> Please work it out between yourselves so we can have a single, clean
> abstraction that works for both.

I'm looking at inline encryption by Google. 
I will find compatibility with inline encryption to avoid conflicts
in BIO/F2FS.
And changing bio iter has a benefit for diskcipher.
Without changing bio iter, diskcipher should control(alloc/free) a buffer
to hold a 'bi_dun' variable for every bio.
But changing bio iter is difficult to accept for block layer,
I will modify the diskcipher.
And, as you mentioned, inline encryption by Google has this control.
So I might be able to use it.

Thanks.
Boojin Kim.