This series adds the support of DISCARD and WRITE_ZEROES commands
and extends the virtio-blk-test to test WRITE_ZEROES command when
the feature is enabled.
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 (6):
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-blk: add DISCARD and WRITE_ZEROES features
tests/virtio-blk: change assert on data_size in virtio_blk_request()
tests/virtio-blk: add test for WRITE_ZEROES command
hw/block/virtio-blk.c | 213 +++++++++++++++++++++++++++++++--
hw/core/machine.c | 2 +
include/hw/virtio/virtio-blk.h | 5 +-
tests/virtio-blk-test.c | 75 +++++++++++-
4 files changed, 281 insertions(+), 14 deletions(-)
--
2.20.1
