[v9,0/5] Add zoned storage emulation to virtio-blk driver

Message

Sam Li March 24, 2023, 10:13 a.m. UTC

This patch adds zoned storage emulation to the virtio-blk driver.

The patch implements the virtio-blk ZBD support standardization that is
recently accepted by virtio-spec. The link to related commit is at

https://github.com/oasis-tcs/virtio-spec/commit/b4e8efa0fa6c8d844328090ad15db65af8d7d981

The Linux zoned device code that implemented by Dmitry Fomichev has been
released at the latest Linux version v6.3-rc1.

Aside: adding zoned=on alike options to virtio-blk device will be
considered in following-up plan.

v9:
- address review comments
  * add docs for zoned emulation use case [Matias]
  * add the zoned feature bit to qmp monitor [Matias]
  * add the version number for newly added configs of accounting [Markus]

v8:
- address Stefan's review comments
  * rm aio_context_acquire/release in handle_req
  * rename function return type
  * rename BLOCK_ACCT_APPEND to BLOCK_ACCT_ZONE_APPEND for clarity

v7:
- update headers to v6.3-rc1

v6:
- address Stefan's review comments
  * add accounting for zone append operation
  * fix in_iov usage in handle_request, error handling and typos

v5:
- address Stefan's review comments
  * restore the way writing zone append result to buffer
  * fix error checking case and other errands

v4:
- change the way writing zone append request result to buffer
- change zone state, zone type value of virtio_blk_zone_descriptor
- add trace events for new zone APIs

v3:
- use qemuio_from_buffer to write status bit [Stefan]
- avoid using req->elem directly [Stefan]
- fix error checkings and memory leak [Stefan]

v2:
- change units of emulated zone op coresponding to block layer APIs
- modify error checking cases [Stefan, Damien]

v1:
- add zoned storage emulation

Sam Li (5):
  include: update virtio_blk headers to v6.3-rc1
  virtio-blk: add zoned storage emulation for zoned devices
  block: add accounting for zone append operation
  virtio-blk: add some trace events for zoned emulation
  docs/zoned-storage:add zoned emulation use case

 block/qapi-sysemu.c                          |  11 +
 block/qapi.c                                 |  18 +
 docs/devel/zoned-storage.rst                 |  17 +
 hw/block/trace-events                        |   7 +
 hw/block/virtio-blk-common.c                 |   2 +
 hw/block/virtio-blk.c                        | 405 +++++++++++++++++++
 hw/virtio/virtio-qmp.c                       |   2 +
 include/block/accounting.h                   |   1 +
 include/standard-headers/drm/drm_fourcc.h    |  12 +
 include/standard-headers/linux/ethtool.h     |  48 ++-
 include/standard-headers/linux/fuse.h        |  45 ++-
 include/standard-headers/linux/pci_regs.h    |   1 +
 include/standard-headers/linux/vhost_types.h |   2 +
 include/standard-headers/linux/virtio_blk.h  | 105 +++++
 linux-headers/asm-arm64/kvm.h                |   1 +
 linux-headers/asm-x86/kvm.h                  |  34 +-
 linux-headers/linux/kvm.h                    |   9 +
 linux-headers/linux/vfio.h                   |  15 +-
 linux-headers/linux/vhost.h                  |   8 +
 qapi/block-core.json                         |  68 +++-
 qapi/block.json                              |   4 +
 21 files changed, 794 insertions(+), 21 deletions(-)