Re: [Qemu-block] [PATCH 0/2] nbd server: drop old-style negotiation

[Eric Blake]

On 10/3/18 12:02 PM, Vladimir Sementsov-Ogievskiy wrote:
> It's unexpected behavior that without -x option qemu-nbd do old-style
> negotiation. Let's use "" as a default name instead (as it is already
> done if tls is used) and therefore, drop old-style negotiation from
> Qemu NBD server.

Oddly enough, I wrote a similar patch in parallel, and am only now just 
seeing your mail. Yours is a bit stronger than mine (I added 'qemu-nbd 
-O' to allow explicit fallback to oldstyle, while you ripped it out 
altogether).  The client can negotiate either style, so we don't need an 
option on the client side; rather, this is all about what the server 
should do by default.

https://lists.gnu.org/archive/html/qemu-devel/2018-10/msg00568.html

Does anyone have a preference between the two? Here's the last time it 
was discussed:

https://lists.gnu.org/archive/html/qemu-devel/2018-08/msg03252.html

> Vladimir Sementsov-Ogievskiy (2):
>    qemu-nbd: drop old-style negotiation
>    nbd/server: drop old-style negotiation
>
>   include/block/nbd.h |  3 +--
>   blockdev-nbd.c      |  2 +-
>   nbd/server.c        | 53 +++++++++++++--------------------------------
>   qemu-nbd.c          | 25 +++++----------------
>   4 files changed, 23 insertions(+), 60 deletions(-)

--
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org