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.
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)
This series requires the new virtio headers from linux v5.0-rc1
already imported by Paolo:
Based-on: <20190104082731.24967-1-pbonz...@redhat.com>
Thanks,
Stefano
Stefano Garzarella (5):
virtio-blk: add acct_failed param to virtio_blk_handle_rw_error()
virtio-blk: add "discard-wzeroes" boolean property
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 | 185 ++++++++++++++++++++++++++++++++-
hw/core/machine.c | 1 +
include/hw/virtio/virtio-blk.h | 3 +
tests/virtio-blk-test.c | 75 ++++++++++++-
4 files changed, 259 insertions(+), 5 deletions(-)
--
2.20.1
