Re: [PATCH] cifs: Fix problem with encrypted RDMA data read

[David Howells]

Stefan Metzmacher <metze@xxxxxxxxx> wrote:

> I'm not sure I understand why this would fix anything when encryption is
> enabled.
> 
> Is the payload still be offloaded as plaintext? Otherwise we wouldn't have
> use_rdma_mr...  So this rather looks like a fix for the non encrypted case.

The "inline"[*] PDUs are encrypted, but the direct RDMA data transmission is
not.  I'm not sure if this is a bug in ksmbd.  As I understand it, encrypting
and decrypting the directly transferred data would need to be done by the NIC,
not the cifs driver.

David

[*] I don't know the correct RDMA terminology for these things.