This patch set attempts to align vhost-user-blk with virtio-blk in
terms of backward compatibility and flexibility. It also improves
the virtio core by introducing new common code that can be used by
a virtio device to calculate its config space size.
In particular it adds the following things:
- Common virtio code for deducing the required device config size based
on provided host features.
- Ability to disable modern virtio-blk features like
discard/write-zeroes for vhost-user-blk.
- Dynamic configuration space resizing based on enabled features,
by reusing the common code introduced in the earlier commits.
- Cleans up the VHostUserBlk structure by reusing parent fields.
Changes since v1 (mostly addresses Stefan's feedback):
- Introduce VirtIOConfigSizeParams & virtio_get_config_size
- Remove virtio_blk_set_config_size altogether, make virtio-blk-common.c
only hold the virtio-blk config size parameters.
- Reuse parent fields in vhost-user-blk instead of introducing new ones.
Daniil Tatianin (8):
virtio: introduce VirtIOConfigSizeParams & virtio_get_config_size
virtio-blk: utilize VirtIOConfigSizeParams & virtio_get_config_size
virtio-net: utilize VirtIOConfigSizeParams & virtio_get_config_size
virtio: remove the virtio_feature_get_config_size helper
virtio-blk: move config size params to virtio-blk-common
vhost-user-blk: make it possible to disable write-zeroes/discard
vhost-user-blk: make 'config_wce' part of 'host_features'
vhost-user-blk: dynamically resize config space based on features
MAINTAINERS | 4 +++
hw/block/meson.build | 4 +--
hw/block/vhost-user-blk.c | 29 +++-
hw/block/virtio-blk-common.c | 39 +++
hw/block/virtio-blk.c | 28 +++
hw/net/virtio-net.c | 8 --
hw/virtio/virtio.c| 10 ---
include/hw/virtio/vhost-user-blk.h| 1 -
include/hw/virtio/virtio-blk-common.h | 20 ++
include/hw/virtio/virtio.h| 10 +--
10 files changed, 104 insertions(+), 49 deletions(-)
create mode 100644 hw/block/virtio-blk-common.c
create mode 100644 include/hw/virtio/virtio-blk-common.h
--
2.25.1
