Hi On Thu, Jan 4, 2018 at 2:53 AM, Changpeng Liu <changpeng....@intel.com> wrote: > Although virtio scsi specification was designed as a replacement for > virtio_blk, > there are still many users using virtio_blk. QEMU 2.9 introduced a new device > vhost user scsi which can process I/O in user space for virtio_scsi, this > commit > introduces a new vhost user block host device, which can support virtio_blk in > Guest OS, and I/O processing in another I/O target. > > Due to the limitation for virtio_blk specification, virtio_blk device cannot > get > block information such as capacity, block size etc via the specification, > several > new vhost user messages were added to deliver virtio config space > information between Qemu and I/O target, > VHOST_USER_GET_CONFIG/VHOST_USER_SET_CONFIG > messages used for get/set config space from/to I/O target, > VHOST_USER_SLAVE_CONFIG_CHANGE_MSG > slave message was added for the event notifier in case the change of virtio > config space. Also, > those messages can be used for vhost device live migration as well. > > CHANGES: > v10: fix the code style error. > v8-v9: Several small optimization and code cleanup according to the comments. > v7-v8: Instead using an event file descriptor for event notifier in case of > virtio > configuration space changed, while here used a new vhost-user slave message > to deliver > such event. Several small optimizations to address the comments from v7. > v6-v7: change the parameter of set configuration function let it only contain > valid data buffer. > v5-v6: add header flags for vhost-user master so that the slave can know the > purpose for > set config, also vhost-user get/set messages' payload doesn't contain invalid > data buffers. > v4-v5: add header offset and size for virtio config space. > v3-v4: refactoring the vhost user block example patch based on new > libvhost-user library. > v2-v3: add new vhost user message to get/set virtio config space. > > Changpeng Liu (4): > vhost-user: add new vhost user messages to support virtio config space > vhost-user-blk: introduce a new vhost-user-blk host device > contrib/libvhost-user: enable virtio config space messages > contrib/vhost-user-blk: introduce a vhost-user-blk sample application
Series: Reviewed-by: Marc-André Lureau <marcandre.lur...@redhat.com> Michael, do you take it? thanks > > .gitignore | 1 + > Makefile | 3 + > Makefile.objs | 1 + > contrib/libvhost-user/libvhost-user.c | 42 +++ > contrib/libvhost-user/libvhost-user.h | 33 ++ > contrib/vhost-user-blk/Makefile.objs | 1 + > contrib/vhost-user-blk/vhost-user-blk.c | 545 > ++++++++++++++++++++++++++++++++ > default-configs/pci.mak | 1 + > docs/interop/vhost-user.txt | 55 ++++ > hw/block/Makefile.objs | 3 + > hw/block/vhost-user-blk.c | 359 +++++++++++++++++++++ > hw/virtio/vhost-user.c | 118 +++++++ > hw/virtio/vhost.c | 32 ++ > hw/virtio/virtio-pci.c | 55 ++++ > hw/virtio/virtio-pci.h | 18 ++ > include/hw/virtio/vhost-backend.h | 12 + > include/hw/virtio/vhost-user-blk.h | 41 +++ > include/hw/virtio/vhost.h | 15 + > 18 files changed, 1335 insertions(+) > create mode 100644 contrib/vhost-user-blk/Makefile.objs > create mode 100644 contrib/vhost-user-blk/vhost-user-blk.c > create mode 100644 hw/block/vhost-user-blk.c > create mode 100644 include/hw/virtio/vhost-user-blk.h > > -- > 1.9.3 > > -- Marc-André Lureau
