Re: [Libguestfs] [PATCH v3 07/14] nbd/server: Refactor to pass full request around

Part of NBD's 64-bit headers extension involves passing the client's requested offset back as part of the reply header (one reason for this change: converting absolute offsets stored in NBD_REPLY_TYPE_OFFSET_DATA to relative offsets within the buffer is easier if the absolute offset of the buffer is also available). This is a refactoring patch to pass the full request around the reply stack, rather than just the handle, so that later patches can then access request->from when extended headers are active. But for this patch, there are no semantic changes. Signed-off-by: Eric Blake<eblake(a)redhat.com>