aravind.ramesh@xxxxxxxxxxxxxxxxxx writes: >> On 29/06/23, 12:37 AM, "Andreas Hindborg" <nmi@xxxxxxxxxxxx >> <mailto:nmi@xxxxxxxxxxxx>> wrote: >> From: Andreas Hindborg <a.hindborg@xxxxxxxxxxx >> <mailto:a.hindborg@xxxxxxxxxxx>> >> Hi All, >> This patch set adds zoned storage support to `ublk`. The first two patches >> does >> some house cleaning in preparation for the last two patches. The third patch >> adds support for report_zones and the following operations: >> > > Just to clarify, we do need you ublk user space patches > to create a ublk device node (with these patches in kernel), right ? I provide an example implementation. I put a link in the cover letter, but I think the sentence referring to the link got lost, thanks for pointing out. https://github.com/metaspace/ubdsrv/commit/7de0d901c329fde7dc5a2e998952dd88bf5e668b This implementation is based on Ming's ubdsrv code. You do not need to use this one, you can write your own. I am also working on an implementation in Rust, but that is still very early. I think Ming is also writing a Rust library for user space ublk devices. But currently my patched ubdsrv is the only user space implementation supporting zoned ublk devices (with the loop and null targets). > >> - REQ_OP_ZONE_OPEN >> - REQ_OP_ZONE_CLOSE >> - REQ_OP_ZONE_FINISH >> - REQ_OP_ZONE_RES > > REQ_OP_ZONE_RESET Thanks! > >> The last patch adds support for REQ_OP_ZONE_APPEND. >> v3 [2] -> v4 changes: >> - Split up v3 patches >> - Add zone append support >> - Change order of variables in `ublk_report_zones` >> Read/write and zone operations are tested with zenfs [3]. >> 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 [4]. >> [1] >> https://github.com/metaspace/ubdsrv/commit/7de0d901c329fde7dc5a2e998952dd88bf5e668b >> <https://github.com/metaspace/ubdsrv/commit/7de0d901c329fde7dc5a2e998952dd88bf5e668b> >> [2] >> https://lore.kernel.org/linux-block/20230316145539.300523-1-nmi@xxxxxxxxxxxx >> <mailto:20230316145539.300523-1-nmi@xxxxxxxxxxxx>/ >> [3] https://github.com/westerndigitalcorporation/zenfs >> <https://github.com/westerndigitalcorporation/zenfs> >> [4] https://git.kernel.dk/linux.git <https://git.kernel.dk/linux.git> >> Andreas Hindborg (4): >> ublk: change ublk IO command defines to enum >> ublk: move types to shared header file >> ublk: enable zoned storage support >> ublk: add zone append >> MAINTAINERS | 2 + >> drivers/block/Kconfig | 4 + >> drivers/block/Makefile | 4 +- >> drivers/block/ublk_drv-zoned.c | 155 +++++++++++++++++++++++++++++++++ >> drivers/block/ublk_drv.c | 150 +++++++++++++++++++------------ >> drivers/block/ublk_drv.h | 71 +++++++++++++++ >> include/uapi/linux/ublk_cmd.h | 38 ++++++-- >> 7 files changed, 363 insertions(+), 61 deletions(-) >> create mode 100644 drivers/block/ublk_drv-zoned.c >> create mode 100644 drivers/block/ublk_drv.h >> base-commit: 3261ea42710e9665c9151006049411bd23b5411f > > Regards, > Aravind
