This patch set attempts to align vhost-user-blk with virtio-blk in terms of backward compatibility and flexibility.
In particular it adds the following things: - Ability to disable modern features like discard/write-zeroes. - Dynamic configuration space resizing based on enabled features, by reusing the code, which was already present in virtio-blk. - Makes the VHostUserBlk structure a bit less clunky by using the 'host_features' field to represent enabled features, as opposed to using a separate field per feature. This was already done for virtio-blk a long time ago. Daniil Tatianin (5): virtio-blk: decouple config size determination code from VirtIOBlock virtio-blk: move config space sizing code 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 | 42 +++++++++++++++++++++++++++ hw/block/virtio-blk.c | 25 ++-------------- include/hw/virtio/vhost-user-blk.h | 4 ++- include/hw/virtio/virtio-blk-common.h | 21 ++++++++++++++ 7 files changed, 90 insertions(+), 39 deletions(-) create mode 100644 hw/block/virtio-blk-common.c create mode 100644 include/hw/virtio/virtio-blk-common.h -- 2.25.1
