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 v6: - Style fixes - Document __ULK_IO_OP_DRV_* - Remove "depends on BLK_DEV_UBLK && BLK_DEV_ZONED" from kconfig - Rework `get_nr_zones()` - Merge `ublk_disk_set_zoned()` and `ublk_dev_param_zoned_apply()` - Fix an exit condition bug in `ublk_report_zones()` - Only call `ublk_set_nr_zones()` if device is zoned - Change a config gate from BLK_DEV_ZONED to BLK_DEV_UBLK_ZONED - Simplify `ublk_alloc_report_buffer()` - Simplify `ublk_revalidate_disk_zones()` - Remove redundant parameter check from `ublk_dev_param_zoned_apply()` - Remove redundant zone size check from `ublk_set_nr_zones()` - Remove `ublk_zoned_commit_completion()` and open code instead - Do not add an extra translation unit (v5 added an extra C file) [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/Kconfig | 4 + drivers/block/ublk_drv.c | 348 ++++++++++++++++++++++++++++++++-- include/uapi/linux/ublk_cmd.h | 48 ++++- 3 files changed, 383 insertions(+), 17 deletions(-) base-commit: 3261ea42710e9665c9151006049411bd23b5411f -- 2.41.0
