This patch series implements a cached report zones using information from the block layer zone write plugs and a new zone condition tracking. This avoids having to execute slow report zones commands on the device when for instance mounting file systems, which can significantly speed things up, especially in setups with multiple SMR HDDs (e.g. a BTRFS RAID volume).
The first patch improves handling of zone management commands. Patch 2 fixes zone resource updates and the following 3 patches cleanup the zone code in preparation for introducing cached zone report support. >From patch 6 to 13, cached report zones is implemented and made available to users with a new ioctl() command. Finally, patches 14 and 15 introduce the use of cached report zones in the mount operation of XFS and BTRFS. These patches are against Jens' for-next tree. Changes from v1: - Move the patch "block: handle zone management operations completions" at the beginning of the series and added a Fixes tag. - Reworked a little patch 2 as suggested by Bart (error path handling) - Added patch 8 as requested by Bart. - Added patch 12 as suggested by Bart. - Corrected various typos in commit messages and code comments. - Added review tags Damien Le Moal (15): block: handle zone management operations completions block: freeze queue when updating zone resources block: cleanup blkdev_report_zones() block: introduce disk_report_zone() block: reorganize struct blk_zone_wplug block: use zone condition to determine conventional zones block: track zone conditions block: refactor blkdev_report_zones() code block: introduce blkdev_get_zone_info() block: introduce blkdev_report_zones_cached() block: introduce BLKREPORTZONESV2 ioctl block: improve zone_wplugs debugfs attribute output block: add zone write plug condition to debugfs zone_wplugs btrfs: use blkdev_report_zones_cached() xfs: use blkdev_report_zones_cached() block/blk-zoned.c | 788 +++++++++++++++++++++++------- block/blk.h | 14 + block/ioctl.c | 1 + drivers/block/null_blk/null_blk.h | 3 +- drivers/block/null_blk/zoned.c | 4 +- drivers/block/ublk_drv.c | 4 +- drivers/block/virtio_blk.c | 11 +- drivers/block/zloop.c | 4 +- drivers/md/dm-zone.c | 54 +- drivers/md/dm.h | 3 +- drivers/nvme/host/core.c | 5 +- drivers/nvme/host/multipath.c | 4 +- drivers/nvme/host/nvme.h | 2 +- drivers/nvme/host/zns.c | 10 +- drivers/scsi/sd.h | 2 +- drivers/scsi/sd_zbc.c | 17 +- fs/btrfs/zoned.c | 11 +- fs/xfs/xfs_zone_alloc.c | 2 +- include/linux/blkdev.h | 49 +- include/linux/device-mapper.h | 10 +- include/uapi/linux/blkzoned.h | 41 +- include/uapi/linux/fs.h | 2 +- 22 files changed, 767 insertions(+), 274 deletions(-) base-commit: ba6a8208cc205c6545c610b5863ea89466fc486a -- 2.51.0
