From: Andreas Hindborg <a.hindborg@xxxxxxxxxxx> Hi All, This patch set adds zoned storage support to `ublk`. The first patch does 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 v9 - Move setup of IO descriptor for zoned operations into separate function - Fix an issue in `ublk_report_zones()` where zone report size was set to `remaining_zones` instead of `zones_in_request` - Do not truncate bufsize to `queue_max_segments` pages in `ublk_alloc_report_buffer()` - Do not change signature of `ublk_dev_param_basic_apply()` (not needed) [1] https://github.com/metaspace/ubdsrv/tree/acc072e077bceea390bae14b6ccb8087f6d0cf1a [2] https://github.com/westerndigitalcorporation/zenfs [3] https://git.kernel.dk/linux.git Andreas Hindborg (2): ublk: add helper to check if device supports user copy ublk: enable zoned storage support drivers/block/ublk_drv.c | 342 ++++++++++++++++++++++++++++++++-- include/uapi/linux/ublk_cmd.h | 36 +++- 2 files changed, 360 insertions(+), 18 deletions(-) base-commit: 3261ea42710e9665c9151006049411bd23b5411f -- 2.41.0
