[RFC v2 0/4] virtio-blk: Add support for FUA write requests

[Alberto Faria <afaria@redhat.com>]

There is a proposal to introduce virtio-blk fua write support to the virtio
spec [1], and a matching kernel RFC [2]. This series implements the proposal by
adding VIRTIO_BLK_{F,T}_OUT_FUA uapi definitions and corresponding virtio-blk,
vhost-user-blk, and vduse-blk support.

[1] https://lore.kernel.org/virtio-comment/20250507152602.3993258-1-afaria@redhat.com/
[2] https://lore.kernel.org/linux-block/20250508001951.421467-1-afaria@redhat.com/

v2:
- Include missing hw/block/virtio-blk.c changes actually implementing
  VIRTIO_BLK_T_OUT_FUA support.

Alberto Faria (4):
  include: Add tentative virtio-blk FUA write definitions
  virtio-blk: Add VIRTIO_BLK_T_OUT_FUA command support
  vhost-user-blk: Add VIRTIO_BLK_T_OUT_FUA command support
  vduse-blk: Add VIRTIO_BLK_T_OUT_FUA command support

 block/export/vduse-blk.c                    |  3 +-
 block/export/vhost-user-blk-server.c        |  1 +
 block/export/virtio-blk-handler.c           |  7 ++-
 contrib/vhost-user-blk/vhost-user-blk.c     | 16 ++++--
 hw/block/vhost-user-blk.c                   |  3 ++
 hw/block/virtio-blk.c                       | 41 +++++++--------
 hw/core/machine.c                           |  5 +-
 hw/virtio/virtio-qmp.c                      |  2 +
 include/hw/virtio/virtio-blk.h              |  1 +
 include/standard-headers/linux/virtio_blk.h |  4 ++
 tests/qtest/vhost-user-blk-test.c           | 56 +++++++++++++++++++++
 tests/qtest/virtio-blk-test.c               | 56 +++++++++++++++++++++
 12 files changed, 168 insertions(+), 27 deletions(-)

-- 
2.49.0