netfs: Support decryption on ubuffered/DIO read
Support unbuffered and direct I/O reads from an encrypted file. This may
require making a larger read than is required into a bounce buffer and
copying out the required bits. We don't decrypt in-place in the user
buffer lest userspace interfere and muck up the decryption.
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Jeff Layton <jlayton@kernel.org>
cc: linux-cachefs@redhat.com
cc: linux-fsdevel@vger.kernel.org
cc: linux-mm@kvack.org
2 files changed
