This series implements a few improvements and cleanups to zone block device zone reset operations with the first three patches.
The remaining of the series patches introduce zone open, close and finish support, allowing users of zoned block devices to explicitly control the condition (state) of zones. While these operations are not stricktly necessary for the correct operation of zoned block devices, the open and close operations can improve performance for some device implementations of the ZBC and ZAC standards under write workloads. The finish zone operation, which transition a zone to the full state, can also be useful to protect a zone data by preventing further zone writes. These operations are implemented by introducing the new REQ_OP_ZONE_OPEN, REQ_OP_ZONE_CLOSE and REQ_OP_ZONE_FINISH request codes and the function blkdev_zone_mgmt() to issue these requests. This new function also replaces the former blkdev_reset_zones() function to reset zones write pointer. The new ioctls BLKOPENZONE, BLKCLOSEZONE and BLKFINISHZONE are also defined to allow applications to issue these new requests without resorting to a device passthrough interface (e.g. SG_IO). Support for these operations is added to the SCSI sd driver, to the dm infrastructure (dm-linear and dm-flakey targets) and to the null_blk driver. Ajay Joshi (5): block: add zone open, close and finish operations block: add zone open, close and finish ioctl support scsi: sd_zbc: add zone open, close, and finish support dm: add zone open, close and finish support null_blk: add zone open, close, and finish support Damien Le Moal (3): block: Remove REQ_OP_ZONE_RESET plugging block: Simplify REQ_OP_ZONE_RESET_ALL handling scsi: sd_zbc: Fix sd_zbc_complete() block/blk-core.c | 12 +++-- block/blk-zoned.c | 99 ++++++++++++++++++---------------- block/ioctl.c | 5 +- drivers/block/null_blk_zoned.c | 33 ++++++++++-- drivers/md/dm-flakey.c | 7 ++- drivers/md/dm-linear.c | 2 +- drivers/md/dm-zoned-metadata.c | 6 +-- drivers/md/dm.c | 5 +- drivers/scsi/sd.c | 15 +++++- drivers/scsi/sd.h | 8 +-- drivers/scsi/sd_zbc.c | 43 +++++++-------- fs/f2fs/segment.c | 3 +- include/linux/blk_types.h | 25 +++++++++ include/linux/blkdev.h | 15 +++--- include/uapi/linux/blkzoned.h | 17 ++++-- 15 files changed, 192 insertions(+), 103 deletions(-) -- 2.21.0 -- dm-devel mailing list dm-devel@redhat.com https://www.redhat.com/mailman/listinfo/dm-devel
