Re: [PATCH v5 6/8] vduse-blk: Implement vduse-blk export

[Stefan Hajnoczi]

On Wed, May 04, 2022 at 03:40:49PM +0800, Xie Yongji wrote:
> This implements a VDUSE block backends based on
> the libvduse library. We can use it to export the BDSs
> for both VM and container (host) usage.
> 
> The new command-line syntax is:
> 
> $ qemu-storage-daemon \
>     --blockdev file,node-name=drive0,filename=test.img \
>     --export vduse-blk,node-name=drive0,id=vduse-export0,writable=on
> 
> After the qemu-storage-daemon started, we need to use
> the "vdpa" command to attach the device to vDPA bus:
> 
> $ vdpa dev add name vduse-export0 mgmtdev vduse
> 
> Also the device must be removed via the "vdpa" command
> before we stop the qemu-storage-daemon.
> 
> Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
> ---
>  MAINTAINERS                   |   4 +-
>  block/export/export.c         |   6 +
>  block/export/meson.build      |   5 +
>  block/export/vduse-blk.c      | 312 ++++++++++++++++++++++++++++++++++
>  block/export/vduse-blk.h      |  20 +++
>  meson.build                   |  13 ++
>  meson_options.txt             |   2 +
>  qapi/block-export.json        |  25 ++-
>  scripts/meson-buildoptions.sh |   4 +
>  9 files changed, 388 insertions(+), 3 deletions(-)
>  create mode 100644 block/export/vduse-blk.c
>  create mode 100644 block/export/vduse-blk.h

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>

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