Hi all,

Last few months ago, VDUSE (vDPA Device in Userspace) [1] has
been merged into Linux kernel as a framework that make it
possible to emulate a vDPA device in userspace. This series
aimed at implementing a VDUSE block backend based on the
qemu-storage-daemon infrastructure.

To support that, we firstly introduce a VDUSE library as a
subproject (like what libvhost-user does) to help implementing
VDUSE backends in QEMU. Then a VDUSE block export is implemented
based on this library. At last, we add resize and reconnect support
to the VDUSE block export and VDUSE library.

Since we don't support vdpa-blk in QEMU currently, the VM case is
tested with my previous patchset [2].

[1] https://www.kernel.org/doc/html/latest/userspace-api/vduse.html
[2] https://www.mail-archive.com/qemu-devel@nongnu.org/msg797569.html

Please review, thanks!

Xie Yongji (5):
  headers: Add vduse.h
  libvduse: Add VDUSE (vDPA Device in Userspace) library
  vduse-blk: implements vduse-blk export
  vduse-blk: Add vduse-blk resize support
  libvduse: Add support for reconnecting

 block/export/export.c                       |    6 +
 block/export/meson.build                    |    5 +
 block/export/vduse-blk.c                    |  448 +++++++
 block/export/vduse-blk.h                    |   20 +
 include/standard-headers/linux/vduse.h      |  306 +++++
 meson.build                                 |   28 +
 meson_options.txt                           |    4 +
 qapi/block-export.json                      |   24 +-
 scripts/meson-buildoptions.sh               |    7 +
 scripts/update-linux-headers.sh             |    1 +
 subprojects/libvduse/include/atomic.h       |    1 +
 subprojects/libvduse/libvduse.c             | 1267 +++++++++++++++++++
 subprojects/libvduse/libvduse.h             |  195 +++
 subprojects/libvduse/meson.build            |   10 +
 subprojects/libvduse/standard-headers/linux |    1 +
 15 files changed, 2321 insertions(+), 2 deletions(-)
 create mode 100644 block/export/vduse-blk.c
 create mode 100644 block/export/vduse-blk.h
 create mode 100644 include/standard-headers/linux/vduse.h
 create mode 120000 subprojects/libvduse/include/atomic.h
 create mode 100644 subprojects/libvduse/libvduse.c
 create mode 100644 subprojects/libvduse/libvduse.h
 create mode 100644 subprojects/libvduse/meson.build
 create mode 120000 subprojects/libvduse/standard-headers/linux

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2.20.1