From: Andreas Hindborg <[email protected]>
Hi All,
This patch set adds zoned storage support to `ublk`. The first two patches do
some house cleaning in preparation for the last patch. The last patch adds
support for report_zones and the following operations:
- REQ_OP_ZONE_OPEN
- REQ_OP_ZONE_CLOSE
- REQ_OP_ZONE_FINISH
- REQ_OP_ZONE_RESET
- REQ_OP_ZONE_APPEND
A user space component based on ubdsrv is available for testing [1] with the
"loop" target.
Read/write and zone operations are tested with zenfs [2].
The zone append path is tested with fio -> zonefs -> ublk -> null_blk.
The implementation of zone append requires ublk user copy feature, and therefore
the series is based on branch for-next (6afa337a3789) of [3].
Changes for v7
- Style fixes
- Rework error handling for `ublk_ctrl_start_dev()`
- Remove `BLK_DEV_UBLK_ZONED`
- Add check for IO command support on command enqueue
- Remove check from `ublk_report_zones()`
- Hoist check out of `ublk_revalidate_disk_zones()`
- Remove check from `ublk_dev_param_zoned_apply()` when !CONFIG_BLK_DEV_ZONED
- Rename `get_nr_zones()` -> `ublk_get_nr_zones()`
- Open code `set_nr_zones()` in `ublk_param_zoned_apply()`
- Reorder fields of `struct ublk_rq_data` to pack better
- Remove redundant checks for chunk_sectors
- Hoist check for user not setting zoned parameters for zoned ublk device out
of `ublk_param_zoned_validate()`
- Remove helper `ublk_dev_params_zoned()`
[1] https://github.com/metaspace/ubdsrv/tree/1ac32cf841b07259cf8b075a5c0006803eeb3981
[2] https://github.com/westerndigitalcorporation/zenfs
[3] https://git.kernel.dk/linux.git
Andreas Hindborg (3):
ublk: add opcode offsets for DRV_IN/DRV_OUT
ublk: add helper to check if device supports user copy
ublk: enable zoned storage support
drivers/block/ublk_drv.c | 321 ++++++++++++++++++++++++++++++++--
include/uapi/linux/ublk_cmd.h | 49 +++++-
2 files changed, 349 insertions(+), 21 deletions(-)
base-commit: 3261ea42710e9665c9151006049411bd23b5411f
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2.41.0