On Fri, Jul 17, 2015 at 4:09 PM, Michael S. Tsirkin <m...@redhat.com> wrote: > This patchset sets the stage for extending the vhost user > protocol, with full backwards compatibility. > > The approach is to negotiate feature bits queried and > acknowledged during device setup. > > For now, there's no new functionality: two new messages > are added that will allow negotiating new messages > required for functionality such as MQ and migration. > > For now, I used the feature bit 30 to signal support for these new messages, > and we now have 64 more bits to play. > > The patches can be found in my tree, branch vhost-user. > > Only patch 1 is intended for 2.4. > > Posting early so people working on extensions such as > migration can review this - but please note > the protocol is not set in stone yet. > > Michael S. Tsirkin (4): > Revert "vhost-user: add multi queue support" > vhost-user: refactor ioctl translation > vhost-user: add protocol feature negotiation > vhost-user: unit test for new messages > > qapi-schema.json | 6 +- > include/hw/virtio/vhost.h | 1 + > hw/net/vhost_net.c | 5 +- > hw/virtio/vhost-user.c | 150 > ++++++++++++++++++++++++++++++---------------- > net/vhost-user.c | 37 ++++-------- > tests/vhost-user-test.c | 19 ++++++ > docs/specs/vhost-user.txt | 40 +++++++++++-- > qemu-options.hx | 5 +- > 8 files changed, 174 insertions(+), 89 deletions(-) > > -- > MST >
Great job. I will reuse the protocol extension to rewrite my patch for live migration with vhost user and legacy guest that does not support GUEST_ANNOUNCE. I will rebase my work on top of this patch and Marc André one about "add migration log support". I hope to finalize my patch next week and provide a complete live migration with vapp as backend. Thanks. Thibaut.
