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[v6,00/10] virtio-blk: add DISCARD and WRITE_ZEROES features

Message ID 20190221103314.58500-1-sgarzare@redhat.com (mailing list archive)
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Series virtio-blk: add DISCARD and WRITE_ZEROES features | expand

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Stefano Garzarella Feb. 21, 2019, 10:33 a.m. UTC
This series adds the support of DISCARD and WRITE_ZEROES commands
and extends the virtio-blk-test to test these new commands.

v6:
- fixed patchew failure on patch 8 (do not initialise globals to 0 or NULL)
- added R-b tags by Stefan

v5:
- rebased on master
- handled the config size for DISCARD and WRITE_ZEROES features as in
  virtio-net (patches 4 and 5) [Michael, Stefan]
- fixed an endianness issues on the WRITE_ZEROES test (patches 8 and 9)
- added a test for DISCARD command to only test the status returned by the
  request (patch 10)
- others patches are unchanged (patches 1, 2, 3, 6, 7)

v4:
- fixed error with mingw compiler in patch 4
  gcc and clang want %lu, but mingw wants %llu for BDRV_REQUEST_MAX_SECTORS.
  Since is less than INT_MAX, I casted it to integer and I used %d in the
  format string of error_setg. (mingw now is happy)

v3:
- rebased on master (I removed Based-on tag since the new virtio headers from
  linux v5.0-rc1 are merged)
- added patch 2 to add host_features field (as in virtio-net) [Michael]
- fixed patch 3 (previously 2/5) using the new host_features field
- fixed patch 4 (previously 3/5) following the Stefan's comments:
                - fixed name of functions and fields
                - used vdev and s pointers
                - removed "wz-may-unmap" property
                - split "dwz-max-sectors" in two properties

v2:
- added patch 1 to use virtio_blk_handle_rw_error() with discard operation
- added patch 2 to make those new features machine-type dependent (thanks David)
- fixed patch 3 (previously patch 1/2) adding more checks, block_acct_start()
                for WRITE_ZEROES requests, and configurable parameters to
                initialize the limits (max_sectors, wzeroes_may_unmap).
                (thanks Stefan)
                I moved in a new function the code to handle a single segment,
                in order to simplify the support of multiple segments in the
                future.
- added patch 4 to change the assert on data_size following the discussion with
                Thomas, Changpeng, Michael, and Stefan (thanks all)
- fixed patch 5 (previously patch 2/2) using local dwz_hdr variable instead of
                dynamic allocation (thanks Thomas)

Thanks,
Stefano

Stefano Garzarella (10):
  virtio-blk: add acct_failed param to virtio_blk_handle_rw_error()
  virtio-blk: add host_features field in VirtIOBlock
  virtio-blk: add "discard" and "write-zeroes" properties
  virtio-net: make VirtIOFeature usable for other virtio devices
  virtio-blk: set config size depending on the features enabled
  virtio-blk: add DISCARD and WRITE_ZEROES features
  tests/virtio-blk: change assert on data_size in virtio_blk_request()
  tests/virtio-blk: add virtio_blk_fix_dwz_hdr() function
  tests/virtio-blk: add test for WRITE_ZEROES command
  tests/virtio-blk: add test for DISCARD command

 hw/block/virtio-blk.c          | 245 ++++++++++++++++++++++++++++++---
 hw/core/machine.c              |   2 +
 hw/net/virtio-net.c            |  31 +----
 hw/virtio/virtio.c             |  15 ++
 include/hw/virtio/virtio-blk.h |   6 +-
 include/hw/virtio/virtio.h     |  15 ++
 tests/virtio-blk-test.c        | 127 ++++++++++++++++-
 7 files changed, 391 insertions(+), 50 deletions(-)

Comments

Stefan Hajnoczi Feb. 22, 2019, 9:49 a.m. UTC | #1
On Thu, Feb 21, 2019 at 11:33:04AM +0100, Stefano Garzarella wrote:
> This series adds the support of DISCARD and WRITE_ZEROES commands
> and extends the virtio-blk-test to test these new commands.
> 
> v6:
> - fixed patchew failure on patch 8 (do not initialise globals to 0 or NULL)
> - added R-b tags by Stefan
> 
> v5:
> - rebased on master
> - handled the config size for DISCARD and WRITE_ZEROES features as in
>   virtio-net (patches 4 and 5) [Michael, Stefan]
> - fixed an endianness issues on the WRITE_ZEROES test (patches 8 and 9)
> - added a test for DISCARD command to only test the status returned by the
>   request (patch 10)
> - others patches are unchanged (patches 1, 2, 3, 6, 7)
> 
> v4:
> - fixed error with mingw compiler in patch 4
>   gcc and clang want %lu, but mingw wants %llu for BDRV_REQUEST_MAX_SECTORS.
>   Since is less than INT_MAX, I casted it to integer and I used %d in the
>   format string of error_setg. (mingw now is happy)
> 
> v3:
> - rebased on master (I removed Based-on tag since the new virtio headers from
>   linux v5.0-rc1 are merged)
> - added patch 2 to add host_features field (as in virtio-net) [Michael]
> - fixed patch 3 (previously 2/5) using the new host_features field
> - fixed patch 4 (previously 3/5) following the Stefan's comments:
>                 - fixed name of functions and fields
>                 - used vdev and s pointers
>                 - removed "wz-may-unmap" property
>                 - split "dwz-max-sectors" in two properties
> 
> v2:
> - added patch 1 to use virtio_blk_handle_rw_error() with discard operation
> - added patch 2 to make those new features machine-type dependent (thanks David)
> - fixed patch 3 (previously patch 1/2) adding more checks, block_acct_start()
>                 for WRITE_ZEROES requests, and configurable parameters to
>                 initialize the limits (max_sectors, wzeroes_may_unmap).
>                 (thanks Stefan)
>                 I moved in a new function the code to handle a single segment,
>                 in order to simplify the support of multiple segments in the
>                 future.
> - added patch 4 to change the assert on data_size following the discussion with
>                 Thomas, Changpeng, Michael, and Stefan (thanks all)
> - fixed patch 5 (previously patch 2/2) using local dwz_hdr variable instead of
>                 dynamic allocation (thanks Thomas)
> 
> Thanks,
> Stefano
> 
> Stefano Garzarella (10):
>   virtio-blk: add acct_failed param to virtio_blk_handle_rw_error()
>   virtio-blk: add host_features field in VirtIOBlock
>   virtio-blk: add "discard" and "write-zeroes" properties
>   virtio-net: make VirtIOFeature usable for other virtio devices
>   virtio-blk: set config size depending on the features enabled
>   virtio-blk: add DISCARD and WRITE_ZEROES features
>   tests/virtio-blk: change assert on data_size in virtio_blk_request()
>   tests/virtio-blk: add virtio_blk_fix_dwz_hdr() function
>   tests/virtio-blk: add test for WRITE_ZEROES command
>   tests/virtio-blk: add test for DISCARD command
> 
>  hw/block/virtio-blk.c          | 245 ++++++++++++++++++++++++++++++---
>  hw/core/machine.c              |   2 +
>  hw/net/virtio-net.c            |  31 +----
>  hw/virtio/virtio.c             |  15 ++
>  include/hw/virtio/virtio-blk.h |   6 +-
>  include/hw/virtio/virtio.h     |  15 ++
>  tests/virtio-blk-test.c        | 127 ++++++++++++++++-
>  7 files changed, 391 insertions(+), 50 deletions(-)
> 
> -- 
> 2.20.1
> 

Thanks, applied to my block tree:
https://github.com/stefanha/qemu/commits/block

Stefan