[Qemu-devel] [PATCH v5 0/4] Introduce vhost-user-scsi and sample application

[Felipe Franciosi <felipe@nutanix.com>]

Based on various discussions on the 2016 KVM Forum, I'm sending over a
vhost-user-scsi implementation for your consideration.

This patchset introduces a new vhost-user SCSI device. While heavily
based on vhost-scsi, it is implemented using vhost's userspace
counterpart. The device has been coded and tested to work with live
migration.

As part of this work, a new vhost-scsi-common device was created and
the existing vhost-scsi device moved underneath it. The new
vhost-user-scsi device is also placed underneath it.

A sample application based on the newly introduced libvhost-user is
also included. It makes use of libiscsi for simplicity.

For convenience, I'm maintaining an up-to-date version of these
patches (including some necessary fixes for libvhost-user) on:

https://github.com/franciozzy/qemu/tree/vus-upstream-v5

See the individual patches for build and use instructions.

Signed-off-by: Felipe Franciosi <felipe@nutanix.com>

v4 -> v5:
- Add a patch to fix a build issue with libvhost-user.

v3 -> v4:
- Drop configure switches and build vus by default.
- Add sample application to .gitignore.
- Removed a whitespace error.
- Rebase on master.

v2 -> v3:
- Rebase after vhost notifier fixes by Paolo.
- Exposed F_HOTPLUG and F_CHANGE on vhost-user-scsi.

v1 -> v2:
- Introduce new vhost-scsi-common device type.
- Move vhost-scsi device underneath vhost-scsi-common.
- Move sample application from tests/ to contrib/.
- Make sample application use the glib event loop.
- Minor fixes.

Felipe Franciosi (4):
  libvhost-user: replace vasprintf() to fix build
  vhost-scsi: create a vhost-scsi-common abstraction
  vus: Introduce vhost-user-scsi host device
  vus: Introduce a vhost-user-scsi sample application

 .gitignore                                |   1 +
 Makefile                                  |   3 +
 Makefile.objs                             |   4 +
 configure                                 |   1 +
 contrib/libvhost-user/libvhost-user.c     |   2 +-
 contrib/vhost-user-scsi/Makefile.objs     |   1 +
 contrib/vhost-user-scsi/vhost-user-scsi.c | 886 ++++++++++++++++++++++++++++++
 default-configs/pci.mak                   |   1 +
 hw/scsi/Makefile.objs                     |   3 +-
 hw/scsi/vhost-scsi-common.c               | 143 +++++
 hw/scsi/vhost-scsi.c                      | 194 ++-----
 hw/scsi/vhost-user-scsi.c                 | 215 ++++++++
 hw/virtio/virtio-pci.c                    |  54 ++
 hw/virtio/virtio-pci.h                    |  11 +
 include/hw/virtio/vhost-scsi-common.h     |  48 ++
 include/hw/virtio/vhost-scsi.h            |  11 +-
 include/hw/virtio/vhost-user-scsi.h       |  35 ++
 include/hw/virtio/virtio-scsi.h           |   5 +
 18 files changed, 1469 insertions(+), 149 deletions(-)
 create mode 100644 contrib/vhost-user-scsi/Makefile.objs
 create mode 100644 contrib/vhost-user-scsi/vhost-user-scsi.c
 create mode 100644 hw/scsi/vhost-scsi-common.c
 create mode 100644 hw/scsi/vhost-user-scsi.c
 create mode 100644 include/hw/virtio/vhost-scsi-common.h
 create mode 100644 include/hw/virtio/vhost-user-scsi.h

-- 
1.9.4