On 11/7/22 20:07, Dmitry Fomichev wrote: > This patch adds support for Zoned Block Devices (ZBDs) to the kernel > virtio-blk driver. > > The patch accompanies the virtio-blk ZBD support draft that is now > being proposed for standardization. The latest version of the draft is > linked at > > https://github.com/oasis-tcs/virtio-spec/issues/143 . > > The QEMU zoned device code that implements these protocol extensions > has been developed by Sam Li and it is currently in review at the QEMU > mailing list. > > A number of virtblk request structure changes has been introduced to > accommodate the functionality that is specific to zoned block devices > and, most importantly, make room for carrying the Zoned Append sector > value from the device back to the driver along with the request status. > > The zone-specific code in the patch is heavily influenced by NVMe ZNS > code in drivers/nvme/host/zns.c, but it is simpler because the proposed > virtio ZBD draft only covers the zoned device features that are > relevant to the zoned functionality provided by Linux block layer. > > Co-developed-by: Stefan Hajnoczi <stefanha@xxxxxxxxx> > Signed-off-by: Stefan Hajnoczi <stefanha@xxxxxxxxx> > Signed-off-by: Dmitry Fomichev <dmitry.fomichev@xxxxxxx> > --- > drivers/block/virtio_blk.c | 459 ++++++++++++++++++++++++++++++-- > include/uapi/linux/virtio_blk.h | 105 ++++++++ > 2 files changed, 545 insertions(+), 19 deletions(-) > Reviewed-by: Chaitanya Kulkarni <kch@xxxxxxxxxx> -ck
