From: Andreas Hindborg <a.hindborg@xxxxxxxxxxx> 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 -- 2.41.0
